Entries |
Document | Title | Date |
20080218147 | VOLTAGE REGULATOR - A voltage regulator having a MOS transistor driver is disclosed. The voltage regulator comprises a p-channel MOS transistor at a voltage input terminal Vin and a p-channel MOS transistor at a voltage output terminal Vout. A drain of the input side p-channel MOS transistor is connected to the voltage input terminal Vin. A threshold voltage or a voltage lower than the threshold voltage is applied to a gate of the input side p-channel MOS transistor. A drain of the output side p-channel MOS transistor is connected to the voltage output terminal Vout. | 09-11-2008 |
20080284404 | Semiconductor device having an integrated, self- regulated PWM current and power limiter and method - A method includes receiving an activation signal at a semiconductor device and generating an output power signal at the semiconductor device in response to receiving the activation signal. The output power signal has a duty cycle. The method also includes providing the output power signal to a load. The output power signal provides power to the load. An amount of power provided to the load is based on the duty cycle of the output power signal. In addition, the method includes adjusting the duty cycle of the output power signal using at least one of a current limiter and a power limiter integrated in the semiconductor device. | 11-20-2008 |
20090009150 | REFERENCE VOLTAGE GENERATOR WITH BOOTSTRAPPING EFFECT - An integrated electronic device for generating a reference voltage. The circuitry has a bias current generator for generating a first bias current, a diode element coupled to the bias current generator and fed by a second bias current derived from the first bias current for converting the second bias current into a reference voltage across the diode element, a supply voltage pre-regulator stage for regulating the supply voltage used for the bias current generator, and an output buffer coupled to the reference voltage for providing a low impedance output, wherein the reference voltage is coupled to the supply pre-regulator stage for biasing the supply pre-regulator stage by the reference voltage. | 01-08-2009 |
20090039860 | LED DRIVE CIRCUIT - An LED driving circuit can improve characteristics. A first current increasing circuit | 02-12-2009 |
20090045793 | Stabilizing methods for current source - A stabilizing current source circuit is provided. The stabilizing current source circuit is used for stabilizing a current provided by a current source, and the current of the current source increases when temperature rises. The stabilizing current source circuit comprises a current source circuit and an adjustment circuit. The current source circuit provides a current that increases when temperature rises. The adjustment circuit is coupled to the current source circuit and provides an input current that increases when temperature rises. The current of the current source is subtracted from the input current to generate a current source current which does not vary with temperature. | 02-19-2009 |
20090237063 | In-Circuit programming of output voltage and output current characteristics of a PSR power supply - A primary-side regulation (PSR) controller integrated circuit includes a PSR CC/CV controller and a non-volatile shift register. An assembled power supply that includes the integrated circuit is in-circuit tested to determine errors in power supply output voltage and/or current. Programming information is determined and shifted into the shift register. During programming, the power supply regulates to a different output voltage, and the different voltage is used for shift register programming. After programming, the power supply operates in a normal mode so that the output voltage and current are within specification. The voltage and current to which the power supply regulates are set by some of the bits of the programming information. Other of the bits set error correction circuits of the PSR CC/CV controller such as a primary inductance variation compensation circuit, a line input voltage variation compensation circuit, an efficiency variation compensation circuit, and a cord resistance compensation circuit. | 09-24-2009 |
20090273331 | REGULATOR CIRCUIT AND CAR PROVIDED WITH THE SAME - An output transistor is provided between an input terminal and an output terminal. An error amplifier adjusts the gate voltage of the output transistor such that the voltage that corresponds to the output voltage approaches a predetermined reference voltage. A fluctuation detection capacitor is provided on a path from the input terminal to a grounded terminal, which sets one terminal thereof to a fixed voltage. A current feedback circuit supplies, to the gate of the output transistor, the current that corresponds to the current that flows through the fluctuation detection capacitor. A clamp circuit clamps the gate voltage of the output transistor. The clamp circuit | 11-05-2009 |
20090273332 | FAST, EFFICIENT REFERENCE NETWORKS FOR PROVIDING LOW-IMPEDANCE REFERENCE SIGNALS TO SIGNAL PROCESSING SYSTEMS - Reference network embodiments are provided for use in pipelined signal converter systems. The network embodiments are fast and power efficient and they generate low-impedance reference signals through the use of a complimentary common-drain output stage, at least one diode-coupled transistor inserted between transistors of the output stage, and a controller. The controller is configured to provide a backgate voltage to the diode-coupled transistor to thereby establish a substantially-constant output current. The controller is further configured to provide gate voltages to the output stage to establish top and bottom reference voltages about the diode-coupled transistor that are spaced from a common-mode voltage. This reference structure maintains a constant output current as the span between the top and bottom reference voltages is selectively altered. In different embodiments, the diode-coupled transistor is replaced with a bipolar junction transistor. | 11-05-2009 |
20090315531 | REFERENCE BUFFER CIRCUITS - A reference buffer circuit provides a reference voltage at an output node and comprises a closed-loop branch comprising an amplifier and first and second MOS transistors and an open-loop branch comprising a third MOS transistor. A positive input terminal of the amplifier receives an input voltage. A gate of the first MOS transistor is coupled to the output terminal of the amplifier, and a source is coupled to a negative input terminal of the amplifier. A gate of the second MOS transistor is coupled to the drain of the first MOS transistor, a source is coupled to a first voltage source, and a drain is coupled to the source of the first MOS transistor. A gate of the third MOS transistor is coupled to the output terminal of the amplifier, and a source is coupled to the output node. | 12-24-2009 |
20090315532 | VERY LOW POWER ANALOG COMPENSATION CIRCUIT - The present invention relates to a compensation circuit for providing compensation over PVT variations within an integrated circuit. Using a low voltage reference current source, the compensation circuit generates directly, from an on-chip reference low voltage supply (V | 12-24-2009 |
20090322304 | SERIES AND PARALLEL HYBRID SWITCHED CAPACITOR NETWORKS FOR IC POWER DELIVERY - Series switches for power delivery. A regulator operated as a current source is arranged in parallel with a switched capacitor divider. A switched capacitor divider is configured in series with a plurality of linear regulators with each regulating one of a plurality of voltage outputs from the switched capacitor divider. In another embodiment, a series switch bridge has a first pair of switches connected in series with a second pair of switches across a voltage input, each switch within a pair of switches is switched in-phase with the other while the first pair of switches is switched out of phase with the second pair of switches. A balancing capacitor is coupled across one switch in both the first and second pair to be in parallel when either of the pair of switches is closed to reduce a charge imbalance between the switches. | 12-31-2009 |
20100007322 | RESISTOR UNIT AND A CIRCUIT INCLUDING THE RESISTOR UNIT - A resistor unit is adapted for use in a constant current source circuit or a temperature compensating circuit for providing temperature compensation to a constant voltage reference circuit. The resistor unit includes at least one first resistor, and at least one second resistor coupled to the first resistor. One of the first and second resistors is a positive temperature coefficient resistor. The other one of the first and second resistors is a negative temperature coefficient resistor. Because a temperature characteristic of the first resistor is opposite to that of the second resistor, an effective resistance of the resistor unit changes in a relatively narrower range with temperature. | 01-14-2010 |
20100007323 | CONTROL APPARATUS OF DC-DC CONVERTER - A control apparatus of a DC-DC converter includes a reactor and a switching element, repeats an accumulation and a discharge of energy of the reactor by a switching operation of the switching element, and converts a direct-current input voltage to acquire a direct-current output voltage. The control apparatus includes: a current value acquiring unit that acquires current values of the reactor in a current rising section and a current descending section of a current waveform of the reactor at a time interval of a half of a switching period of the switching element; and a center value estimating unit that estimates a center value of a current of the reactor based on the current values acquired in the current rising section and the current descending section. | 01-14-2010 |
20100085030 | Semiconductor Device and RFID Tag Using the Semiconductor Device - A semiconductor device monitors a voltage between a reference potential and an input potential and obtains a constant output potential regardless of a value of the voltage, after the voltage exceeds a predetermined threshold voltage in such a manner that the semiconductor device divides a voltage between the reference potential and the input potential using a plurality of first non-linear elements and at least one linear element to constantly generate a first bias voltage regardless of a value of the voltage, divides a voltage between the reference potential and the input potential using a plurality of second non-linear elements with reference to the first bias voltage to constantly generate a second bias voltage regardless of a value of the voltage, and determines the output potential with reference to the second bias voltage. | 04-08-2010 |
20100127688 | CURRENT LOAD DRIVING DEVICE - A current load driving device includes a power supply terminal connected to a power supply line, an earth terminal connected to an earth line, one or more output terminals, a constant voltage source, a control unit, a current output unit, and a command unit. The constant voltage source supplies constant voltage to the control unit. The control unit outputs a control current to the current output unit so that a voltage between the power supply line and the earth line becomes a target voltage and stops the output of the control current if the voltage between the power supply line and the earth line does not reach the target voltage. The command unit provides a signal for switching ON and OFF the control current output to the current output unit. The current output unit increases or decreases a current to output to the output terminal. | 05-27-2010 |
20100134086 | CIRCUIT ARRANGEMENT COMPRISING A LOAD TRANSISTOR AND A MEASURING TRANSISTOR - One aspect is a circuit arrangement having a load current path with a load transistor having a first and a second load path terminal and a control terminal. A first measurement current path includes a measuring transistor having a first and a second load path terminal and a control terminal. The control terminals and first load path terminals of the load transistor and the measuring transistor are coupled. A first regulating circuit has a controllable resistor and is designed to drive the resistor depending on electrical potentials at the second load path terminals of the load transistor and of the measuring transistor. A current mirror circuit is coupled between the first measurement current path and a second measurement current path. A deactivation circuit is designed to deactivate the first regulating circuit depending on a current flowing through the measuring transistor. | 06-03-2010 |
20100156382 | SOFT-START CIRCUIT AND POWER SUPPLY CIRCUIT INCLUDING SAME - A soft-start circuit to generate and output a soft-start voltage having a specified gradient. The soft-start circuit includes a slope voltage generator circuit to generate and output multiple slope voltages having different specified gradients, including a steepest slope voltage whose gradient is steepest among the gradients of the multiple slope voltages and a mildest slope voltage whose gradient is mildest thereamong, at least one voltage conversion circuit to receive the slope voltages and output a voltage whose gradient is milder than the gradient of the steepest slope voltage, and a selection circuit to receive at least one specified reference voltage and the voltage generated by the voltage conversion circuit, compare the voltage by the voltage conversion circuit with the specified reference voltage, and output either the voltage or the specified reference voltage as the soft-start voltage in accordance with a comparison result generated by the selection circuit. | 06-24-2010 |
20100156383 | CURRENT DETECTION CIRCUIT AND VOLTAGE CONVERTER USING THE CURRENT DETECTION CIRCUIT - A first auxiliary switch circuit is connected to one terminal and a first terminal of a main switch circuit and generates a first auxiliary detection current. A second auxiliary switch circuit is connected to the other terminal and a second terminal of the main switch circuit and generates a second auxiliary detection current. A current adjustment detection circuit adjusts the first auxiliary detection current so that the potentials of the other terminal and the first terminal are equal and passes the first auxiliary detection current in a direction of receiving the current from the first auxiliary switch circuit and adjusts the second auxiliary detection current so that the potentials of the one terminal and the second terminal are equal and passes the second auxiliary detection current in a direction of outputting the current to the second auxiliary switch circuit, thereby generating a detection current being proportional to the output current. | 06-24-2010 |
20100201341 | Three-Leg Power Converter Apparatus - A three-leg power converter apparatus including first, second and third input/output ports, a three-leg bridge converter, a filter circuit, a decoupling circuit and a controller is presented. The three-leg bridge converter has three single-leg circuits, two DC terminals connecting to two terminals of the first input/output port, and three mid-terminals with each of them being formed by a middle point of one of the three single-leg circuits. The controller connects to the three-leg bridge converter for controlling an input or output current passing through each DC terminal and mid-terminal. The filter circuit connects between two of the mid-terminals and the second input/output port. The decoupling circuit has two terminals connecting to the second input/output port and another terminal connecting to a terminal of the third input/output port, with the third input/output port having another terminal connecting to the other mid-terminal that dose not connect with the filter circuit. | 08-12-2010 |
20100253312 | COMBINED SEMICONDUCTOR RECTIFYING DEVICE AND THE ELECTRIC POWER CONVERTER USING THE SAME - A combined semiconductor rectifying device includes PN-junction silicon diode and Schottky barrier diode exhibiting a breakdown voltage higher than the breakdown voltage of PN-junction silicon diode, and Schottky barrier diode is made of a semiconductor, the band gap thereof is wider than the band gap of silicon. The combined semiconductor rectifying device exhibits a shortened reverse recovery time, low reverse leakage current characteristics and a high breakdown voltage, and is used advantageously in an electric power converter. | 10-07-2010 |
20100253313 | ELECTRONIC DEVICE AND METHOD FOR DC-DC CONVERSION WITH SLOPE COMPENSATION - An electronic device is provided which comprises circuitry for DC-DC conversion configured to switch an inductor current through an inductor using slope compensation, wherein the circuitry comprises a slope compensation stage configured to generate a slope compensation signal as a function of an switching frequency of the DC-DC conversion and an input voltage of the DC-DC converter. | 10-07-2010 |
20100264898 | GENERATION OF HIGHLY ACCURATE AND HIGHLY DYNAMIC DIRECT CURRENTS FROM A RECTIFIER GROUP AND AN ACTIVE FILTER WHICH IS CONNECTED IN PARALLEL WITH THE LOAD FOR SMOOTHING PURPOSES - A power supply for generating temporally specifiable, open- and closed-loop controlled current paths includes a first controllable rectifier group that includes at least one rectifier having a smoothing inductor at an output. An active filter is connected in parallel to a load, the active filter including a second rectifier group with at least one rectifier and a pulse bridge connected to an output thereof. A second-order low pass filter has a clock inductor, a capacitor, and an RC damping, the clock inductor being connected located at an output of the pulse bridge. A voltage of the at least one rectifier of the first controllable rectifier group and a voltage of the active filter in an open and closed loop is controlled, a first controlled system controlling a current of the at least one rectifier of the first controllable rectifier group of the power supply system in open and closed loop via a first controller by an output-side open- and closed-loop controlled variable, and a second controlled system of a second controller for a load current and a subordinate controller for a load voltage controlling the active filter in open and closed loop using a feedforward control variable. | 10-21-2010 |
20100270998 | CIRCUIT FOR CONTROLLING THE CURRENT IN AN ELECTRICAL CONTROL MEMBER OR THE VOLTAGE ACROSS THE TERMINALS OF SAID ELECTRICAL CONTROL MEMBER - The present invention relates to a circuit ( | 10-28-2010 |
20100295528 | CIRCUIT FOR DIRECT GATE DRIVE CURRENT REFERENCE SOURCE - A direct gate drive current reference source circuit is provided. The direct gate drive current reference source circuit includes a reference voltage generation core outputting a reference voltage of constant magnitude and a transistor directly receiving the reference voltage from the reference voltage generation core, without a resistor between the transistor and a ground. | 11-25-2010 |
20100320993 | CONSTANT VOLTAGE CIRCUIT - A disclosed constant voltage circuit is configured to become active or inactive and convert an input voltage applied to an input terminal into a predetermined constant voltage for output from an output terminal. The circuit includes an output transistor for supplying, from the input terminal to the output terminal, an output current, an error amplifier circuit unit for controlling operations of the output transistor to make a first proportional voltage, which is proportional to the output voltage from the output terminal, equal to a predetermined reference voltage, a ramp voltage generating circuit unit for generating and outputting a ramp voltage whose voltage level increases at a predetermined speed from start-up, and an amplifier circuit unit for amplifying the voltage difference between the ramp voltage and a second proportional voltage, which is proportional to the output voltage, and outputting the amplified voltage difference to a control electrode of the output transistor. | 12-23-2010 |
20100320994 | MULTI-PARALLEL MAGNETIC-FIELD CANCELLATION TYPE TRANSFORMER - A multi-parallel magnetic-filed cancellation type transformer includes a plurality of coils which generate magnetic flux during energization and a core having a plurality of magnetic leg portions on which the coils are wound, and bases for fixing the magnetic leg portions. The plurality of coils are wound on the magnetic leg portions in such a manner that the magnetic flux generated from the coils are formed in the directions opposite to each other. A plurality of closed magnetic circuits of the magnetic flux are formed at the magnetic leg portions and the bases. The magnetic resistance of the closed magnetic circuits is homogeneous. Accordingly, the transformer can reduce the size thereof, and prevent the deterioration of electric power conversion efficiency. | 12-23-2010 |
20110001464 | POWER CONVERSION DEVICE - While the amount of stored electricity is maintained at about 50 percent of a charging capacity using a direct-current power assist device connected to a direct-current circuit of an inverter, a certain period of time is monitored. When electricity is charged or discharged, the amount of peak cut, as a power assist, cannot be controlled. Moreover, it is impossible to carry out charge-and-discharge discrete control unique to a load corresponding to the intended use. In a setting section of a chopper control section of the direct-current power assist device, a charge start voltage, a charge stop voltage, a non-control voltage range, a discharge stop voltage, and a discharge start voltage are set as setting values. Each setting value is selected in accordance with a detection value of a direct-current detection voltage of the inverter, and output to a charge control section and a discharge control section as a charge target value and a discharge target value, respectively. Moreover, a load compensation gain section is provided to calculate a gain compensation section corresponding to a deviation signal between a terminal voltage discharge threshold and a terminal voltage of a capacitor device detected. Using the gain compensation signal, a limiter value of a driving torque limiter provided in a control circuit of the inverter is varied to adjust an instruction of current. | 01-06-2011 |
20110031955 | CONSTANT CURRENT DEVICE - A constant current device in accordance with the present invention is connected to an external voltage source and comprises an input unit, a driving transistor and a voltage control unit. The input unit is connected to the external voltage source. The driving transistor is used to output constant current. The voltage control unit makes the driving output constant current and comprises at least one resistor and a semiconductor load, and has a resistor voltage, the resistor comprising an input and an output. | 02-10-2011 |
20110050196 | REFERENCE CURRENT GENERATING CIRCUIT - A reference current generating circuit includes first and second standard current generating circuits to generate first and second standard currents, respectively and first and second trimming circuits to generate first and second reference circuits by trimming the standard current values outputted from the standard current generating circuits. The second standard current generating circuit operates for a part of an operation period of the first standard current generating circuit. The value of the first reference current is compared with a value of the second reference current, and controlled so as to approach the value of the second reference current by a trimming controller | 03-03-2011 |
20110062936 | AC POWER SWITCHING MODULE - An AC power switching module comprising: AC current input and output means; switching means located between said input and output means for selectively blocking or passing said AC current; a switch controller arranged to provide an output signal to the switching means to control the state of the switching means; a primary control for setting the output of the switch controller; and a secondary control for setting the output of the switch controller, wherein said secondary control comprises a current-dependent circuit dependent on the AC current. | 03-17-2011 |
20110068764 | Semiconductor Circuits Capable of Mitigating Unwanted Effects Caused by Input Signal Variations - Semiconductor circuit capable of mitigating unwanted effects caused by variations in a received input signal are provided, in which a main circuit receives an input signal and comprises a first current source coupled between a first node and a first power voltage to generate a first current according to a first bias voltage. A replica circuit is coupled to the main circuit to duplicate a variation in a voltage at the first node caused by a variation in the input signal and dynamically adjusts the first bias voltage according to the duplicated variation such that the first current is maintained at a constant. | 03-24-2011 |
20110187343 | COMMUNICATION DEVICE AND BATTERY PACK IN WHICH THE COMMUNICATION DEVICE IS PROVIDED - A communication device, includes a CMOS type inverter configured to transfer a signal, the signal being transferred and received between an electronic device and a control part able to communicate with the electronic device whose electric power supply is a rechargeable battery; and a regulator configured to generate a regulated voltage, the regulated voltage being formed by decreasing an electric power supply voltage of the electronic device, wherein the regulator includes a depletion type NMOS transistor where a drain is connected to a high electric potential side of the electric power supply voltage and a gate and a source are mutually connected, and a capacitive element having an electrode connected to the source side and another electrode connected to a low electric potential side of the electric power supply voltage, wherein a voltage of the capacitive element is supplied across both ends of the inverter. | 08-04-2011 |
20110210714 | Circuit for Generating a Control Current - A circuit includes a supply voltage and a control current line including two resistors. A sink current line branches off from the control current line between the resistors. A current sink transistor has an emitter that is connected to the sink current line and a collector that is connected to ground via a first further resistor. At least one reference transistor has an emitter that is connected to its base, to the supply voltage via a second further resistor and to the base of the current sink transistor. The collector of the reference transistor is connected to ground or to an emitter of a further reference transistor, which is switched in a manner similar to the first reference transistor. | 09-01-2011 |
20110241645 | CURRENT SOURCE CIRCUIT - A current source circuit has a voltage application terminal that is applied with a prescribed voltage; an output terminal that outputs the current; a first MOS transistor of which a source is connected to the voltage application terminal; a second MOS transistor of which a source is connected to a drain of the first MOS transistor and a drain is connected to the output terminal; a third MOS transistor of which a source is connected to the voltage application terminal; a fourth MOS transistor of which a source is connected to a drain of the third MOS transistor and a drain is connected to the output terminal. The current source circuit, in a state where the bias voltage is applied to the first input terminal such that the predetermined current flows into the first and fourth MOS transistors, controls turning ON/OFF of the second MOS transistor and the third MOS transistor so as to synchronize according to the switch voltage applied to the second input terminal. | 10-06-2011 |
20110273160 | AC VOLTAGE REGULATOR - A voltage regulator includes a source port configured to be coupled to a power source and a load port configured to be coupled to a load. The voltage regulator also includes a constant current source circuit in electrical communication with the source port and the load port configured to regulate current flowing between the source port and the load port. Current flows in both a positive direction and a negative direction between the source port and the load port, and the constant current source circuit regulates the current that flows in the positive direction and the current that flows in the negative direction. | 11-10-2011 |
20110309817 | DC-DC BOOST CONVERTER CIRCUIT AND METHOD FOR DRIVING THE SAME - Disclosed herein are a DC-DC boost converter circuit, which is capable of preventing power loss and stabilizing switching elements by implementing soft switching and improving efficiency by adding a charge pumping function, and a method for driving the same. The DC-DC boost converter circuit, in which an inductor and an output diode are connected in series and an output capacitor and a load are connected to an output port of the output diode in parallel, includes an output stabilization circuit in which first and second switching elements, a transformer, a plurality of boost capacitors, and a plurality of diodes are connected in series/parallel between the inductor and the output diode. | 12-22-2011 |
20110316514 | Voltage Converter and Voltage Conversion Method - A voltage converter and a voltage conversion method is disclosed. The voltage converter includes input terminals configured to receive an input voltage. Output terminals are configured to provide an output voltage and an output current. At least one first converter stage is connected between the input terminals and the output terminals, comprising at least one unipolar transistor, and configured to provide a first output current. At least one second converter stage is connected between the input terminals and the output terminals, comprising at least one bipolar transistor, and configured to provide a second output current. A control circuit is configured to control the first output current and the second output current such that there is a first output current range in which the first output current is higher than the second output current. | 12-29-2011 |
20120007576 | CURRENT-FED CONVERTER - A converter circuit includes first and second input terminals for receiving an input current from a current source, a first capacitor connected between the first and second input terminals, a second capacitor having a first terminal which is connected to the second input terminal and a second terminal forming a positive voltage node. First and third semiconductor components are connected in series between the first input terminal and the positive voltage node to form a first node. A series connection of a first inductive component, a first diode and a second inductive component is connected between the second input terminal and the first node. A third capacitor and a third inductive component are included, as are first and second output terminals. The first and the third semiconductor components are configured to control the voltage between the first and second input terminals. | 01-12-2012 |
20120019231 | Variable Voltage Converter with Direct Output Voltage Clamping - A power conversion circuit includes a variable voltage converter (VVC) with a stabilizing means for stabilizing its output voltage. The stabilizing means can be in the form of a diode that clamps the VVC output voltage to the VVC input voltage so that the output voltage does not drop below the input voltage when a load imposes a sudden power demand. The stabilizing means also enables a bypass mode in which transient power can be provided from a power source to an inverter without current flow through the VVC inductor or switches. When embodied as a diode, the stabilizing means can increase the maximum power that can be transferred by the power conversion circuit, improve the power response of the circuit, minimize control instability, and reduce power losses. | 01-26-2012 |
20120074922 | CURRENT SENSING CIRCUIT - A current sensing circuit can prevent operation error due to a rush current and/or a shifted sense ratio. The circuit includes a power MOSFET, a series combination of a sense resistor and a sense MOSFET, which are connected in parallel to the power MOSFET Qph, a delay circuit for delaying the edges of drive signal, by first delay time, a delay circuit for delaying the edges of the drive signal by a second delay time, logic for combining signals and a current sensing circuit for sensing an electric current of the sense MOSFET based on an electric current of the sense resistor. | 03-29-2012 |
20120112729 | IN-RUSH LIMITER CIRCUIT FOR A DRIVER MODULE - A limiter circuit includes a voltage rail having an input and an output, the input receiving an applied input voltage, a switching device in electrical communication with the voltage rail to selective control an electric current flowing through the output of the voltage rail, limiter capacitor in electrical communication with the input of the voltage rail and the switching device, wherein the limiter capacitor and the switching device are in parallel electrical communication between the input and an electrical ground, and a first resistor interposed between the limiter capacitor and the electrical ground, wherein an impedance of the resistor and the limiter capacitor define a time constant for the charging the limiter capacitor, and wherein the time constant of the limiter capacitor controls a voltage applied to the switching device and a current flowing through the output of the voltage rail. | 05-10-2012 |
20120161742 | CURRENT GENERATOR AND METHOD OF OPERATING - A current generator includes an op-amp having a negative terminal arranged to be coupled to an input voltage, a resistance selection circuit having at least one tunable resistor connected with each other, and at least one power transistor. A gate of the at least one power transistor is coupled to an output of the op-amp, and a drain of the at least one power transistor is coupled to the at least one tunable resistor or a load. The resistance selection circuit is configured to select a node of the at least one tunable resistor based on the input voltage for coupling from a positive terminal of the op-amp. The at least one tunable resistor is configured to adjust a resistance setting to control a current level of the current generator based on a power supply voltage or a current of a reference resistor. | 06-28-2012 |
20120176116 | OUTPUT CIRCUIT - An output circuit includes a driving transistor, an output transistor, a current limiting element, and a switching transistor. A first terminal of each of the driving transistor and the output transistor is connected to a power line. The current limiting element is connected between a second terminal of the driving transistor and a control terminal of the output transistor. The switching transistor is connected in parallel with the current limiting element. The output transistor and the switching transistor have the same junction type or the same conductivity type. A control terminal of the switching transistor is connected to the control terminal of the output transistor. | 07-12-2012 |
20120176117 | ELECTRONIC CONTROL APPARATUS HAVING SWITCHING ELEMENT AND DRIVE CIRCUIT - An electronic control apparatus includes a switching element; an ON-drive constant-current circuit supplying a constant current to the control terminal of the switching element thereby charging the control terminal of the switching element; an OFF-drive switching element discharging electrical charge from the control terminal of the switching element by being turned ON; and a control circuit adapted to control the ON-drive constant-current circuit and the OFF-drive switching element in response to a drive signal being inputted, thereby controlling the voltage of the control terminal of the switching element so as to drive the switching element. The control circuit controls the current control transistor based on the voltage of the current detection resistor and supplies the constant current to the control terminal of the switching element, and detects an abnormality in the ON-drive constant-current circuit based on the voltage of the current detection resistor. | 07-12-2012 |
20120194164 | Cuk Based Current Source - Disclosed is a Ćuk based current source, a control circuit for a Ćuk based current source, and a method for providing a current. | 08-02-2012 |
20120194165 | METHOD OF LIMITING A CURRENT SUPPLIED BY A DC POWER SUPPLY - The invention relates to a method of limiting a current i | 08-02-2012 |
20120217950 | Method And Circuit For Catching Excess Current - Data may be encoded onto a direct current power line by modulating the current on that direct current power line. One method of modulating the current is by placing an inductor on the power line and then using a controlled transistor that turns on and turns off. The inductor will ensure that current keeps flowing but the transistor will induce changes in the current pattern. The excess current from when transistor is turned off must be diverted. Furthermore, to create symmetrical current changes, the inductor should be reverse biased. Thus, a circuit is created that sinks the excess current from when the transistor is turned off and used to reverse bias the inductor. | 08-30-2012 |
20120223695 | ELECTRONIC DEVICE AND METHOD FOR A LIMITER IN AN AC APPLICATION - An electronic device, including a first limiter including a first transistor configured to be coupled with a first side of a channel to a first output node of a non-ideal voltage source having an inner impedance greater zero in order to limit the voltage at the first output node by drawing a current from the first output node. The second side of the channel of the first transistor is coupled to a capacitor so as to supply a current from the first output node to the capacitor, if the voltage level at the output node reaches or exceeds an upper limit. | 09-06-2012 |
20120249114 | CONSTANT CURRENT GENERATION CIRCUIT AND MICROPROCESSOR INCLUDING THE SAME - A constant current generation circuit of the invention includes: a temperature variable voltage generation unit that generates a first variation voltage whose voltage value fluctuates with temperature; a variation gradient adjustment unit that generates a second variation voltage based on a reference voltage smaller in the amount of variation with temperature than the first variation voltage and the first variation voltage; and a current generation unit that includes a current setting resistor whose resistance value fluctuates with temperature and generates an output current based on the second variation voltage and the current setting resistor. The variation gradient adjustment unit sets the coefficient of variation with temperature of the second variation voltage so that the difference between it and the coefficient of variation with temperature of the resistance value of the current setting resistor is within a preset first stipulated range. | 10-04-2012 |
20120299572 | INPUT CURRENT REGULATOR, DRIVING METHOD THEREOF, AND DISABLE CIRCUIT THEREOF - The present invention relates to a dimmer and an input current regulator provided in a power supply. The input current regulator includes: a bleeding circuit generating a bleeding current from an input current passed through the dimmer; a sensing circuit sensing the input current, and controlling the bleeding circuit according to a sense voltage corresponding to the input current; and a biasing circuit generating a power voltage for operation of the input current regulator during operation of the power supply. The input current includes a bleeding current and a power current supplied to the power supply. | 11-29-2012 |
20120306470 | DOWN-CONVERTING VOLTAGE GENERATING CIRCUIT - A down-converting voltage generating circuit includes a reference voltage providing unit, an initial setting unit, a driving unit, and a driving force control unit. The reference voltage providing unit provides a reference voltage to a first node. The initial setting unit drops a voltage level of the first node to substantially a level of a ground voltage when an initial setting signal is activated. The driving unit drives a down-converted voltage derived from an external voltage in response to the voltage level of the first node. The driving force control unit is connected to the driving unit, and controls a driving force for driving the down-converted voltage of the driving unit in response to the initial setting signal. | 12-06-2012 |
20120313616 | AC DISCHARGE CIRCUIT FOR AN AC-TO-DC SWITCHING POWER CONVERTER - An AC discharge circuit is disclosed to eliminate the need of bleeding resistors for an AC-to-DC switching power converter. The AC-to-DC switching power converter has two AC power input terminals to be connected to an AC power source, and an AC input capacitor connected between the two AC power input terminals. The AC discharge circuit has a rectifier circuit to rectify a first voltage across the AC input capacitor to be a second voltage applied to an input terminal of a JFET, and a power removal detector to monitor a third voltage at an output terminal of the JFET to trigger a power removal signal to discharge the AC input capacitor when the third voltage has been remained larger than a threshold for a de-bounce time. | 12-13-2012 |
20120319673 | Direct Coupled Biasing Circuit for High Frequency Applications - This invention eliminates the need for “capacitor coupling” or “transformer coupling,” and the associated undesirable parasitic capacitance and inductance associated with these coupling techniques when designing high frequency (˜60 GHz) circuits. At this frequency, the distance between two adjacent stages needs to be minimized. A resonant circuit in series with the power or ground leads is used to isolate a biasing signal from a high frequency signal. The introduction of this resonant circuit allows a first stage to be “directly coupled” to a next stage using a metallic trace. The “direct coupling” technique passes both the high frequency signal and the biasing voltage to the next stage. The “direct coupling” approach overcomes the large die area usage when compared to either the “AC coupling” or “transformer coupling” approach since neither capacitors nor transformers are required to transfer the high frequency signals between stages. | 12-20-2012 |
20120326694 | DATA RETENTION SECONDARY VOLTAGE REGULATOR - An integrated circuit device has a primary voltage regulator and an ultra-low power secondary voltage regulator. The ultra-low power secondary voltage regulator supplies voltage to certain circuits used for providing data retention and dynamic operation, e.g., a real time clock and calendar (RTCC) when the integrated circuit device is in a low power sleep mode. The primary voltage regulator provides power to these same certain circuits when the integrated circuit is in an operational mode. | 12-27-2012 |
20130009622 | Device and Module of Triggering and Generating Temperature Coefficient Current - A device of triggering and generating temperature coefficient current for generating a temperature coefficient current includes a positive temperature coefficient current generating unit, for generating a first positive temperature coefficient current, a negative temperature coefficient current generating unit, for generating a first negative temperature coefficient current, and a triggering unit, for triggering to generate the temperature coefficient current according to a triggering temperature and a current difference between the first positive temperature coefficient current and the first negative temperature coefficient current. | 01-10-2013 |
20130057245 | Current Regulator - A current regulator has a current regulating semiconductor device and a microcontroller which outputs a PWM pulse for driving a load to the current regulating semiconductor device and receives outputs of a high-side current detection circuit and a low-side current detection circuit from the current regulating semiconductor device. An output mixer of the current regulating semiconductor device switches, in synchronization with the PWM pulse, between the output of the high-side current detection circuit and the output of the low-side current detection circuit on one signal line to output the output to the microcontroller. | 03-07-2013 |
20130063122 | Device and Method for Protecting a Battery - A battery protection device for protecting a battery ( | 03-14-2013 |
20130099769 | Current source circuit with high order temperature compensation and current source system thereof - A current source circuit with high order temperature compensation, includes a reference voltage terminal, a first power module, a second power module, a control module, a current source output module and a bias current source module. The control module includes a first field-effect tube (FET), a second FET, and a third FET. The bias current source module includes a first bias current source and a second bias current source. The current source output module includes a fourth FET, a fifth FET, and an output terminal. The first power module includes a first comparator, a sixth FET, a first resistor and a second resistor. The second power module includes a second comparator, a seventh FET, a third resistor, and a fourth resistor. A current source system with high order temperature compensation is further provided. | 04-25-2013 |
20130113454 | SIGNAL GENERATING CIRCUIT - A signal generating circuit includes: a first signal amplifying circuit arranged to generate a first amplified signal according to a first supply current, a reference signal, and an output signal of the signal generating circuit; a soft-start circuit arranged to generate a control signal according to a soft-start signal; a current controlled circuit arranged to generate the first supply current according to the soft-start signal; and a pass transistor arranged to generate an output signal according to an error amplified signal and the control signal, wherein the error amplified signal is derived from the first amplified signal. | 05-09-2013 |
20130119963 | BOOTSTRAP CIRCUIT AND ELECTRONIC DEVICE APPLYING THE SAME - A bootstrap circuit includes: a first switch element, coupled a clock signal; a second switch element, coupled to an operating voltage and the first switch element; a third switch element, coupled to the first switch element; a first charge storage unit, coupled to the second and third switch elements; and a voltage converting unit, coupled to the first charge storage unit as well as the first, second and third switch elements. When the clock signal is at a first logic state, the first charge storage unit is charged. When the clock signal is at a second logic state, a cross voltage of the first charge storage ensures that the voltage converting unit converts an input voltage to an output voltage. | 05-16-2013 |
20130119964 | MULTI-MEASUREMENT VORTEX FLOWMETER - Two-wire transmitters are described in which the required voltage that a control room must supply to the transmitter is lower at high current than at low current, thus freeing up more voltage for other uses, and in which a constant set of operating voltages may be maintained. A corrected pressure in a vortex flow meter may be determined that reflects the mass flow rate. Thus, the mass flow rate may be determined based on the corrected pressure reading and a measured volumetric flow rate. Density may be determined from pressure and temperature using a table containing error values based on a standard density determination and a relatively simple approximation. During operation of a flow meter, the stored error values may be linearly interpolated and the approximation may be computed to determine the density from the stored error value. | 05-16-2013 |
20130119965 | REGULATED BOOTSTRAP POWER SUPPLY - An exemplary power supply includes a low side switch and a high side switch. A driver controls operation of the high side switch. A bootstrap capacitor supplies power to the driver. An energy storage portion is in parallel with the bootstrap capacitor to provide control over whether a voltage of the bootstrap capacitor drops below a desired voltage. A voltage regulator is in parallel with the bootstrap capacitor for limiting current provided to the bootstrap capacitor and for regulating a voltage of the bootstrap capacitor. | 05-16-2013 |
20130119966 | TWO-DIRECTIONAL CURRENT DOUBLE-BOOST QUADRATIC DC/DC CONVERTER - A current reversible DC/DC double-boost quadratic converter, capable of performing high transformation ratios. | 05-16-2013 |
20130127437 | CONSTANT INPUT CURRENT FILTER FOR POWER SUPPLIES AND RELATED SYSTEM AND METHOD - A system includes a capacitor and a current source configured to draw a constant input current from a power source and to generate an output current. The current source includes an n-type field effect transistor that is biased to operate as a constant current source. The current source is configured to provide the output current to the capacitor and charge the capacitor during a first time period associated with operation of a load. The current source is also configured to provide the output current to the load and the capacitor is configured to provide an additional current to the load during a second time period associated with operation of the load. The load could represent an electronic device having a time-varying output power characteristic, such as a wireless radio. | 05-23-2013 |
20130154603 | MAINTAIN POWER SIGNATURE (MPS) POWERED DEVICE (PD) - A Maintain Power Signature (MPS) Powered Device (PD) is described. In one or more implementations, the MPS device comprises a current sensor configured to sense current flowing from Power Sourcing Equipment (PSE) to the PD. The current sense based MPS device also comprises a current generator configured to sink electrical current to prevent the PSE from removing power to the PD. Thus, the electrical current comprises a current amplitude characteristic selected based upon MPS requirements of the PSE. In some implementations, the current is sunk to a ground. In other implementations, the current is sunk to a storage device, such as a storage device included with the PD and/or external to the PD. | 06-20-2013 |
20130193948 | LOW POWER CIRCUIT FOR REDUCING LEAKAGE POWER USING NEGATIVE VOLTAGE - A power circuit for reducing a leakage power using a negative voltage is provided. The power circuit includes a current source including a transistor including a gate. The power circuit further includes a current source control circuit connected to the gate of the transistor, and configured to apply a positive voltage to the gate of the transistor if the current source is to operate in an active mode, and apply the negative voltage to the gate of the transistor if the current source is to operate in an inactive mode. | 08-01-2013 |
20130221943 | CONSTANT INPUT CURRENT FILTER USING HIGH-FREQUENCY SWITCHING FOR POWER SUPPLIES AND RELATED SYSTEM AND METHOD - A system includes a constant input current filter configured to draw a constant input current from a power source and to generate a variable output current. The constant input current filter includes a capacitor, a boost converter, and a buck converter. The boost converter is configured to receive at least a portion of the input current and to charge the capacitor using at least the portion of the input current during first time periods associated with operation of a load. The buck converter is configured to discharge the capacitor and to provide an additional current as part of the output current during second time periods associated with operation of the load. The load could represent an electronic device having a time-varying output power characteristic, such as a wireless radio. | 08-29-2013 |
20130229166 | PROGRAMMABLE SLEW RATE POWER SWITCH - An apparatus is configured to provide a voltage rising at the output with a programmable slew rate. The apparatus comprises a ramp-up control circuit module for supplying an increasing output voltage that is output to a load circuit. The ramp-up control circuit comprises an amplifier that receives the output of a plurality of selectable mirrored current sources that build up voltage across a capacitor for programming a selected linear slew rate for the increasing output voltage. The apparatus further comprises a glitch filter circuit for stabilizing the increasing output voltage so as to minimize glitches, including current and voltage stress, in the output voltage. | 09-05-2013 |
20130249524 | ENHANCED ON-TIME GENERATOR - This document discusses, among other things, voltage converters and computed on-time voltage converters. In an example, an on-time generator for a voltage converter can include a timing capacitor configured to provide a timing voltage, a comparator configured to receive the timing voltage and a threshold voltage and to provide the timing signal using a comparison of the timing voltage and the threshold voltage, a current source configured to discharge the timing voltage of the timing capacitor after a start-up delay, and first and second compensation capacitors configured to bias the timing voltage of the timing capacitor to compensate for the start-up delay. | 09-26-2013 |
20130307514 | Output Module for Industrial Control with Sink and Source Capability and Low Heat Dissipation - An I/O circuit for use with an industrial controller provides a photovoltaic optical isolator communicating between a controller and a field-side of the I/O circuit, the photovoltaic optical isolator eliminating the need for high wattage power dropping circuits for powering the field-side of the I/O circuit from high-voltage field signals. The field effect transistor type transistors permit use of the low-power photovoltaic optical isolator while allowing flexible connections to various field circuit types. | 11-21-2013 |
20130307515 | CIRCUIT FOR GENERATING A DUAL-MODE PTAT CURRENT - The present invention discloses a circuit for generating a dual-mode proportional to absolute temperature (PTAT) current. The circuit includes a voltage stabilizing circuit to provide a voltage reference, and a load current control circuit comprising a first transistor to provide a first load current based on the voltage reference, a second transistor to provide a second load current based on the voltage reference, a first switch to control whether to allow the first load current to flow therethrough in response to different predetermined temperatures, and a second switch to control whether to allow the second load current to flow therethrough in response to the different predetermined temperatures. A resultant current resulting from at least one of the first load current or the second load current has different current magnitudes at the different predetermined temperatures. | 11-21-2013 |
20140028280 | SEMICONDUCTOR DEVICE - A device, comprising: first and second signal lines; first and second transistors of first conductivity type coupled in series between first and second signal lines and coupled to each other at first node; third and fourth transistors of second conductivity type coupled in series between first and second lines and coupled to each other at second node; power supply node coupled in common to first and second nodes; fifth transistor of first conductivity type coupled between first and second signal lines; and sixth transistor of second conductivity type coupled between first and second signal lines, wherein each of first, second and fifth transistors is configured to receive first control signal at gate electrode thereof, each of the third and fourth transistors is configured to receive second control signal at gate electrode thereof, and sixth transistor is configured to receive third control signal at gate electrode thereof. | 01-30-2014 |
20140049243 | CURRENT GENERATOR AND METHOD OF OPERATING - A current generator includes an amplifier having a first terminal configured to receive an input voltage, at least one tunable resistor coupled to a second terminal of the amplifier, a resistor calibration circuit coupled to the at least one tunable resistor, and at least one transistor. A gate of the at least one transistor is coupled to an output of the amplifier, and a terminal of the at least one transistor is coupled to the at least one tunable resistor or a load. The resistor calibration circuit is configured to adjust a resistance setting of the at least one tunable resistor to control a current level of the current generator based on a power supply voltage or a current of a reference resistor. | 02-20-2014 |
20140097823 | Artificial Ramp Generating in PWM Modulator for Current Control Mode - Circuits and related methods for artificial ramp generation for pulse-width modulators (PWM) for current control mode switch mode power supplies (SMPS).are disclosed. The artificial ramp generation is separated from a current sensing part and allows easy trimming of both paths. Artificial ramp is generated as a voltage on a capacitor biased by constant current and placed between a voltage sensing node and an input of a PWM comparator. The circuit disclosed reduces circuit complexity and susceptibility to noise and spikes from the input voltage. | 04-10-2014 |
20140111179 | PHASE CURRENT BALANCING FOR MULTIPHASE CONVERTERS - A DC-DC converter includes a first differential voltage sensor to detect a first inductor current by sensing a first differential voltage across a first power stage of the DC-DC converter. A second differential voltage sensor detects a second inductor current by sensing a second differential voltage across a second power stage of the DC-DC converter. An integrator stage combines the first differential voltage from the first power stage and the second differential voltage from the second power stage to generate a compensation signal to adjust current balancing for the DC-DC converter. | 04-24-2014 |
20140111180 | METHOD AND APPARATUS FOR CURRENT SENSING IN POWER OVER ETHERNET (PoE) SYSTEMS - Systems and methods are provided for power control. In some implementations, a power control system includes a first transistor having a drain coupled to a first conductor (e.g., first pair of wires of an Ethernet cable), a second transistor having a drain coupled to a second conductor (e.g., second pair of wires of the Ethernet cable), a current sensor coupled to sources of the first and second transistors, and a current management circuit. The current management circuit may detect drain voltages of the first transistor and the second transistor, and adjust gate voltages of the first transistor and the second transistor to keep the drain voltages of the first transistor and the second transistor approximately equal. The current management circuit may detect a current through the current sensor, and adjust the gate voltages of the first transistor and the second transistor to limit the detected current to a current limit. | 04-24-2014 |
20140125307 | SYNCHRONIZED SELF-REFERENCED HIGH VOLTAGE ALTERNATING CURRENT POWER SAVING REGENERATOR SWITCH SYSTEM - A method and apparatus for self-referenced Alternating Current (AC) voltage chopping using non-linear dual switches configured in series with the Load to regulate voltage according to a positive or negative instantaneous voltage value and a positive going or negative going state is disclosed. Power applied to inductive Loads is conserved by automatically tracking the current demand of the Load and reusing the reactive energy held by the Load. A source AC power signal is converted to a representative digital logic square wave pulse signal referenced to ground, and conditioned for precision timing of power and regeneration switching circuits. Power and regeneration switching circuits are differential circuits referenced only to themselves. These floating circuits are not Direct Current circuits and are never referenced to ground or any specific voltage. The value of the source voltage is irrelevant because the differential voltage is re-routed on to itself. | 05-08-2014 |
20140266137 | CURRENT GENERATOR, METHOD OF OPERATING THE SAME, AND ELECTRONIC SYSTEM INCLUDING THE SAME - A current generator includes a first current generation circuit configured to generate a first current having a first current noise which depends on a change in a supply voltage, a second current generation circuit configured to generate a second current having a second current noise which depends on the change in the supply voltage, and a current subtracting circuit configured to generate a third current with the first current noise and the second current noise removed by subtracting the second current from the first current. | 09-18-2014 |
20150028842 | INTEGRATED LIMITER AND ACTIVE FILTER - An integrated limiter and active filter constituted of: an input node; an output node; a transistor coupled between the input node and the output node; a first control circuit coupled to the control terminal of the transistor and arranged to limit the amount of current flowing through the output node to a predetermined value which is responsive to a signal received at a first reference input; a second control circuit coupled to the control terminal of the transistor and arranged to limit the voltage appearing at the output node to a predetermined value which is responsive to a signal received at a second reference input; and a third control circuit coupled to input node and arranged to provide the second reference input, the third control circuit arranged to set the second reference input responsive to the input voltage and to a predetermined maximum allowed output voltage. | 01-29-2015 |
20150048813 | SEMICONDUCTOR DEVICE AND POWER SOURCE CONTROL METHOD - There is provided a semiconductor device including: a power source section that steps down a power source voltage to generate a step-down voltage, and that stops generation of the step-down voltage when input with a stop signal; a control section that is driven by the step-down voltage generated by the power source section, and that outputs to the power source section a stop signal to stop generation of the step-down voltage; and a power source controller that prohibits input of the stop signal to the power source section until the step-down voltage has become a predetermined value or greater. | 02-19-2015 |
20150097547 | Method and Apparatus for a Floating Current Source - As taught herein, a floating current source outputs a load biasing current from a source terminal into an external load which may have a variable resistance, and sinks the load biasing current from the load into a sink terminal. Advantageously, the floating current source includes a single-transistor current sink having a bias control that sets the magnitude of the load biasing current desired, and further includes a single-transistor current source that self-biases from the float voltage developed on the external load to an operating point at which the single-transistor current source sources the desired magnitude of load biasing current. One or more AC shunts within the self-biasing network prevent any AC fluctuations present or impressed on the source terminal of the floating current source from changing the operating point of the single-transistor current source, thereby imparting a high effective impedance to the single-transistor current source. | 04-09-2015 |
20150102798 | DC-DC CONVERTER WITH MODULAR STAGES - An apparatus for electric power conversion includes a converter having a regulating circuit and switching network. The regulating circuit has magnetic storage elements, and switches connected to the magnetic storage elements and controllable to switch between switching configurations. The regulating circuit maintains an average DC current through a magnetic storage element. The switching network includes charge storage elements connected to switches that are controllable to switch between plural switch configurations. In one configuration, the switches forms an arrangement of charge storage elements in which at least one charge storage element is charged using the magnetic storage element through the network input or output port. In another, the switches form an arrangement of charge storage elements in which an element discharges using the magnetic storage element through one of the input port and output port of the switching network. | 04-16-2015 |
20150108963 | VOLTAGE COMPENSATION CIRCUIT AND CONTROL METHOD THEREOF - A voltage compensation circuit and a control method thereof dynamically compensate a voltage drop caused by supplying power from a first power line to a function circuit. The voltage compensation circuit includes an amplifier, a detection module and a boosting module. The amplifier has an inverse input end coupled to the first power line and the function circuit to be supplied with a load voltage supplying to the function circuit, a non-inverse input end for being supplied with a reference voltage, and an output end coupled to the detection module to output a comparison signal. The boosting module is coupled between the detection module and the inverse input end of the amplifier. The detection module generates compensation voltage information according to the comparison signal. The boosting module outputs the compensation voltage to the inverse input end of the amplifier according to the compensation voltage information. | 04-23-2015 |
20150145499 | INTERRUPT PROTECTION CIRCUITS, SYSTEMS AND METHODS FOR SENSORS AND OTHER DEVICES - Embodiments relate to circuits, systems and methods for providing interruption protection for sensors and other devices. One example embodiment includes an interruption protection circuit comprising at least one charge pump and at least one buffer capacitor configured to maintain and/or provide sufficient voltage for output signals of sensors or other devices during micro-breaks or other interruptions. | 05-28-2015 |
20150355663 | VOLTAGE GENERATING CIRCUIT AND PRE-DRIVING SIGNAL GENERATING MODULE - A voltage generating circuit including a pre-driving unit and a voltage generating unit is provided. The pre-driving unit receives an oscillation signal and enhances a driving capability of the oscillation signal to generate a pre-driving signal. The voltage generating unit receives an input signal and the pre-driving signal, and generates an output signal according to the input signal and the pre-driving signal. The voltage generating unit generates a voltage signal according to the pre-driving signal. One of the pre-driving unit and the voltage generating unit adjusts a slew rate or a ringing component of the voltage signal by using the pre-driving signal. A pre-driving signal generating module for driving a voltage generating circuit is also provided. | 12-10-2015 |
20150363533 | VOLTAGE AND CURRENT LIMITS FOR ELECTRONIC DEVICE BASED ON TEMPERATURE RANGE - A design verification system simulates operation of an electronic device to identify one or more power characteristic vs. temperature (PC-T) curves for the electronic device. Each of the one or more PC-T curves indicates, for a particular reliability characteristic limit, a range of power characteristic values over a corresponding range of temperatures that are not expected to result in the reliability characteristic limit being exceeded. Based on the one or more PC-T curves, the design verification system sets a range of power characteristic limits, over a corresponding range of temperatures, for the electronic device. During operation, the electronic device employs a temperature sensor to measure an ambient or device temperature, and sets its power characteristic (voltage or current) according to the measured temperature and the power characteristic limits. | 12-17-2015 |
20150372593 | AVERAGE CURRENT CONTROL FOR A SWITCHED POWER CONVERTER - A circuit for controlling a switch in a power converter in which peak current is regulated to achieve a specified average current through a load. Control logic is operable to monitor a voltage across a sensing resistor such that when the voltage across the sensing resistor reaches or exceeds a threshold value, the control logic generates a signal that causes a switch to be turned OFF. | 12-24-2015 |
20160006429 | DRIVE DEVICE FOR INSULATED-GATE SEMICONDUCTOR ELEMENT, AND POWER CONVERTER - A driver circuit for turning ON and OFF one of two parallel-connected insulated-gate semiconductor elements includes a voltage control circuit that controls a level of a power supply voltage in response to a detected element temperature of the one semiconductor element, a constant current supply section, responsive to a drive signal, for supplying a constant current to a gate of the one semiconductor element to turn the one semiconductor element ON, the power supply voltage being supplied to the constant current supply section from the voltage control circuit, and a discharge circuit, responsive to the drive signal, for discharging an electric charge accumulated in the gate to turn the one semiconductor element OFF. | 01-07-2016 |
20160013713 | DC TO DC CONVERTERS AND CONTROLLERS THEREOF | 01-14-2016 |
20160041571 | CURRENT GENERATOR CIRCUIT AND METHOD OF CALIBRATION THEREOF - A current generator circuit includes at least one current generation component arranged to generate an output current of the current generator circuit, at least one absolute current calibration component arranged to enable calibration of an absolute current value of the output current, and at least one temperature coefficient calibration component arranged to enable calibration of a temperature coefficient characteristic of the output current. The at least one temperature coefficient calibration component is further arranged to be in a passive state at a reference temperature. | 02-11-2016 |
20160041576 | MULTI-MEASUREMENT VORTEX FLOWMETER - Two-wire transmitters are described in which the required voltage that a control room must supply to the transmitter is lower at high current than at low current, thus freeing up more voltage for other uses, and in which a constant set of operating voltages may be maintained. A corrected pressure in a vortex flow meter may be determined that reflects the mass flow rate. Thus, the mass flow rate may be determined based on the corrected pressure reading and a measured volumetric flow rate. Density may be determined from pressure and temperature using a table containing error values based on a standard density determination and a relatively simple approximation. During operation of a flow meter, the stored error values may be linearly interpolated and the approximation may be computed to determine the density from the stored error value. | 02-11-2016 |
20160048149 | CURRENT LIMITER - A current limiter for selectively limiting a rate of change of current in a DC electrical network may include a first electrical block including an inductive element and a second electrical block including a bidirectional switch. The first electrical block is connected in parallel with the second electrical block between first and second terminals, and the first and second terminals are connectable to the DC electrical network. The bidirectional switch is switchable to: (1) a first mode to permit current flow through the second electrical block in a first current direction and at the same time inhibit current flow through the second electrical block in a second, opposite current direction; and (2) a second mode to permit current flow through the second electrical block in the second current direction and at the same time inhibit current flow through the second electrical block in the first current direction. | 02-18-2016 |
20160065061 | SYNCHRONOUS SENSING OF INDUCTOR CURRENT IN A BUCK CONVERTER CONTROL CIRCUIT - A sense resistor is placed in series with an output capacitor of a buck converter. The buck converter operates in a discontinuous mode such that there is a dead time in each switching cycle. A control circuit senses a voltage across the sense resistor and thereby generates a first signal I | 03-03-2016 |
20160070288 | VOLTAGE GENERATION CIRCUIT - Provided is a voltage generation circuit in which a power supply terminal | 03-10-2016 |
20160079979 | PULSED LEVEL SHIFT AND INVERTER CIRCUITS FOR GAN DEVICES - GaN-based half bridge power conversion circuits employ control, support and logic functions that are monolithically integrated on the same devices as the power transistors. In some embodiments a low side GaN device communicates through one or more level shift circuits with a high side GaN device. Both the high side and the low side devices may have one or more integrated control, support and logic functions. Some devices employ electro-static discharge circuits and features formed within the GaN-based devices to improve the reliability and performance of the half bridge power conversion circuits. | 03-17-2016 |
20160087529 | Bootstrap Circuit - A bootstrap circuit includes an N-channel MOS transistor including: a first N-type semiconductor layer formed on a surface of a P-type semiconductor substrate and electrically connected to a bootstrap capacitor; a P-type semiconductor layer formed on a surface of the first N-type semiconductor layer; a second N-type semiconductor layer formed on a surface of the P-type semiconductor layer; a first electrode electrically connected to the P-type semiconductor layer; a second electrode electrically connected to the second N-type semiconductor layer; and a power-source terminal connected to each of the first electrode and the second electrode for supplying a power-source voltage thereto, the N-channel MOS transistor supplying power to the bootstrap capacitor, and a current limiting element connected between the power-source terminal and the first electrode. | 03-24-2016 |
20160091917 | CONSTANT CURRENT-CONSTANT VOLTAGE CIRCUIT - A constant current-constant voltage circuit includes a first resistor; a first transistor that is an N-channel type; a second transistor; a third transistor that is a P-channel type; a fourth transistor that is a P-channel type; a fifth transistor; a second resistor; and a first constant voltage element. The second resistor is coupled between the intermediate node and a source of the third transistor and the first constant voltage element is coupled between a source of the second transistor and the second power source line. A bias is set up and a source potential of the first transistor is equal to a source potential of the fifth transistor. | 03-31-2016 |
20160094128 | INTERMEDIATE VOLTAGE CIRCUIT CURRENT CONVERTER IN FIVE-POINT TOPOLOGY - An intermediate voltage circuit current converter having two current converter sections arranged in series on the direct voltage side is disclosed. The current converter section has a capacitor connected in parallel with two bridge modules that are connected in series with each other. The output of the current converter section is located on the series connection between the two bridge modules and the outputs of the two current converter sections are connected to a further bridge module. Each bridge modules comprises a series connection of two power semiconductor units. The intermediate potentials on the connection between the two power semiconductor units in each of the bridge modules are electrically connected to one another by a further capacitor, and the intermediate potential of the further bridge module provides the phase connection of the intermediate voltage circuit current converter for a given phase of the intermediate voltage circuit current converter. | 03-31-2016 |
20160126833 | DC BOOSTING CIRCUIT - A DC boosting circuit includes switch connected to a first circuit and a second circuit. The first circuit includes first and second elements, and the second circuit includes the second element and a third element. The first and second elements store energy based on an input voltage when the switch is in a first state. The third element stores energy from the second element when the switch is in the second state. The second circuit outputs a voltage greater than the input voltage, and the first, second, and third elements are reactors or capacitors. | 05-05-2016 |
20160157305 | OFFSET VOLTAGE ELIMINATING CIRCUIT STRUCTURE FOR PROTECTION MECHANISM OF DIMMER | 06-02-2016 |
20160161972 | VOLTAGE SUPPLY FOR SUPPLYING IN ZONES VOLTAGES PROPORTIONAL TO A MASTER SUPPLY VOTLAGE USING VOLTAGE MIRRORING - A scaled voltage supply to supply voltage biases to circuits in voltage zones. The scaled voltage supply includes a master voltage corresponding to a voltage drop across a master-upper rail having a voltage V | 06-09-2016 |
20160179123 | SUPPLY CIRCUIT | 06-23-2016 |
20180026518 | Multi-Stage Multilevel DC-DC Step-Down Converter | 01-25-2018 |
20180026528 | Power Converter and Power Conversion Method | 01-25-2018 |