| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 323293000 | Using an impedance as the final control device | 59 |
| 20090033306 | Voltage trimming - Embodiments are provided that include a memory die, memory devices, and methods, such as those comprising a voltage generator, including an output voltage and an adjustment circuit configured to cause adjustment of the output voltage based on a latch signal. Further one such method includes applying an input voltage to an input of a voltage generator, adjusting the input voltage to an adjusted voltage, comparing the adjusted voltage to a reference voltage, generating trim data based on the comparison and storing the trim data. | 02-05-2009 |
| 20090033307 | METHOD AND APPARATUS FOR A HIGH VOLTAGE POWER SUPPLY CIRCUIT - A control circuit for use in a power supply is disclosed. An example control circuit according to aspects of the present invention includes a signal generator coupled to generate an output signal to control switching of a power switch to be coupled to the control circuit. A feedback circuit is coupled to receive a feedback signal, which is representative of an output of the power supply during a feedback portion of an off time of the power switch. The signal generator generates the output signal in response to the feedback circuit to control a fraction of the feedback portion of the off time of the power switch that the feedback signal is above a threshold and another fraction of the feedback portion of the off time of the power switch that the feedback signal is below the threshold. | 02-05-2009 |
| 20090102448 | Voltage regulator and method for generating indicator signal in voltage regulator - The present invention discloses a voltage regulator which generates a control signal to convert an input voltage to an output voltage, the voltage regulator comprising: a regulator module for generating the control signal according to comparison between a signal representative of the output voltage and a signal representative of a reference voltage; and an amplifier for generating a first index signal by amplifying a difference between the signal representative of the output voltage and the signal representative of the reference voltage. | 04-23-2009 |
| 20090206816 | CONTROLLER FOR A DOMESTIC APPLIANCE, DOMESTIC APPLIANCE AND ASSOCIATED METHOD - A controller for functionally controlling a domestic appliance, such as a dryer, comprises a monitoring device that monitors the correct functioning of the domestic appliance. The domestic appliance has at least one monitoring connection connected to at least one associated evaluation node within a power circuit of the domestic appliance, and an evaluation device evaluates a signal produced at the at least one monitoring connection, for monitoring the correct functioning of the domestic appliance. | 08-20-2009 |
| 20090219004 | POWER SUPPLY CONTROL DEVICE AND POWER SUPPLY CONTROL METHOD - A power supply control device includes a boost type power supply controller boosting an input voltage, a step down power supply controller reducing an output of the boost type power supply controller to output an output voltage, a first control loop including the boost type power supply controller, and a second control loop including the step down power supply controller, wherein the output voltage is controlled by the second control loop during a predetermined period beginning after the power supply control device enters a power-on state, and wherein the output voltage is controlled by the first control loop after the predetermined period passes. | 09-03-2009 |
| 20090237061 | DC-DC CONVERSION DEVICE WITH DIGITALLY CONTROLLED COMPARATOR - A DC-DC conversion device is provided. The DC-DC conversion device includes a control signal generator, a conversion module and a comparison module. The control signal generator generates a control signal according to a delay signal. The conversion module is coupled to the control signal generator to convert an input voltage to an output voltage according to the control signal. The comparison module is coupled to the control signal generator and conversion module to compare the output voltage with a reference voltage and output the delay signal according to the comparison result, an enable signal and a clock signal. | 09-24-2009 |
| 20090261799 | METHOD AND A DEVICE FOR FEEDING DC POWER TO AN AMPLIFIER MODULE FOR A PULSED LOAD - Various embodiments include a method for feeding DC power to an amplifier module for a pulsed load, comprising: providing current pulses from a DC power supply; charging a capacitor configuration in the amplifier module; providing an output voltage via a voltage regulated power supply; feeding current pulses to said load from said capacitor configuration, determining an output current (I | 10-22-2009 |
| 20100033154 | Current balance in a multi-phase power converter with constant on-time control - A multi-phase power converter with constant on-time control includes a plurality of channels to convert an input voltage into an output voltage, and each of the channels is driven by a control signal. When all channel currents of the channels are balanced, each of the control signals remains a constant on-time. When the channel currents are imbalanced, the on-times of the control signals are modulated according to the difference between each channel current and a target value for current balance between the channels. | 02-11-2010 |
| 20100072970 | ADAPTIVE VOLTAGE POSITION DC-DC REGULATORS AND THE METHOD THEREOF - The present invention discloses an adaptive voltage position DC-DC regulator and the method thereof, the regulator comprising a main circuit and a control circuit which includes a sensing unit, a feedback unit, a comparing unit, a PWM generator and a driver. The regulator realizes the adaptive voltage position control with simple internal circuit and fewer pins. | 03-25-2010 |
| 20100117618 | OVER CURRENT PROTECTION CIRCUIT AND POWER CONVERTER USING THE SAME - An over current protection circuit and a power converter using the same. The over current protection circuit includes a soft start cell and an operational amplifier. The soft start cell outputs a soft start signal according to a direct current (DC) level, and the soft start signal increases progressively to the DC level in a soft start interval. The operational amplifier outputs an over current signal to a feedback control circuit according to the soft start signal and an inductance current of a switching converter so that a duty cycle of a driving signal from the feedback control circuit increases progressively in the soft start interval. | 05-13-2010 |
| 20100156379 | DEVICE FOR MEASURING THE CURRENT FLOWING THROUGH A POWER TRANSISTOR OF A VOLTAGE REGULATOR - A device for measuring the current flowing through a power transistor of a voltage regulator, the voltage regulator having an input voltage and providing a regulated output voltage and the power transistor coupled between the input and output voltages. The measuring device includes a further transistor adapted to mirror a portion of the current flowing through the power transistor, the further transistor and the power transistor have a first non-drivable terminal in common that is coupled to the input voltage. The measuring device also includes a circuit block to connect the second non-drivable terminals of the power and the further transistor and to provide an output current equal to the portion of the current flowing through the first transistor; the measuring device further including a circuit adapted to detect the output current of said circuit block. | 06-24-2010 |
| 20100213916 | FREQUENCY MODULATOR AND FM TRANSMISSION CIRCUIT USING THE SAME - An input signal is input via a first resistor to an inverting input terminal of an operational amplifier. A second resistor is provided on a feedback path between an output terminal and the inverting input terminal of the operational amplifier. A control voltage Vcnt output from the operational amplifier is input to a VCO. A frequency divider frequency-divides an output signal Sout of the VCO. A phase comparator compares an output signal from the frequency divider with a reference clock signal and outputs a voltage according to a phase difference. A loop filter removes a high-frequency component of an output voltage Vcp of the phase comparator and outputs the voltage to a non-inverting input terminal of the operational amplifier. | 08-26-2010 |
| 20100213917 | Frequency Compensation Scheme for Stabilizing the LDO Using External NPN in HV Domain - A voltage regulator may comprise a regulator output configured to provide a regulated voltage, which may be controlled by an error amplifier based on the regulated voltage and a reference voltage. The error amplifier may control a source-follower stage to mirror a multiple of the current flowing in the source-follower stage into an internal pass device. A voltage developed by the mirror current may control an external pass device configured to deliver the load current into the regulator output. A first resistor may be configured to decouple a load capacitor coupled between the regulator output and reference ground, when the load current is below a specified value. A second resistor may be configured to create a bias current in the internal pass device even when the external pass device is close to cut-off region. A third resistor may be configured to counter the effects of negative impedance at the control terminal of the external pass device caused by the current-gain of the external pass device. A compensation capacitor and resistor may be coupled in series between the output of the error amplifier and the output of the voltage regulator to provide frequency compensation for the Miller-Effect. | 08-26-2010 |
| 20100264896 | Voltage regulator circuit - It is desired for semiconductor devices to reduce an inrush current and an overshoot. According to the voltage regulator circuit of the present invention, when a power supply is turned on, a switch SW | 10-21-2010 |
| 20100277153 | ADAPTIVE CONSTANT-VOLTAGE CONTROL CIRCUIT AND ADAPTIVE POWER CONVERTER CONTROLLER - An adaptive power converter controller coupled to a load and a power converter circuit is provided. The adaptive power converter controller has an adaptive voltage sensing unit and a converting control circuit. The adaptive voltage sensing unit is coupled to the load and output a voltage sensing signal according to a load current and a load voltage from the load. The converting control circuit is utilized for receiving the voltage sensing signal and comparing the voltage level of the voltage sensing signal with a current sensing signal, which is corresponding solely to the load current, so as to decide whether the power converter circuit is controlled according to the voltage sensing signal or the current sensing signal. | 11-04-2010 |
| 20100283444 | REGULATED VOLTAGE SYSTEM AND METHOD OF PROTECTION THEREFOR - A system comprises a voltage regulator operably coupled to an external component, a voltage regulator reset circuit and at least one functional element supplied with a voltage by the voltage regulator. The voltage regulator reset circuit is arranged to repetitively reset the voltage regulator upon disconnection of the external component. | 11-11-2010 |
| 20110089926 | Power consumption control method and apparatus for a portable terminal - A method and apparatus control power consumption in a portable terminal by cutting the direct current (DC) bias voltage. The power consumption control apparatus of a portable terminal is connected to the processors. The apparatus includes an oscillator, an inverter, and a DC bias voltage cutting unit. The oscillator creates signals to control the portable terminal to be operated in a sleep mode or a standby mode. The inverter receives the signals from the oscillator and outputs inverted signals to the processors. The DC bias voltage cutting unit cuts a DC bias voltage that is derived on a feedback line between an input port and an output port of the inverter, from the signals created by the oscillator. The apparatus and method can allow the portable terminal to reduce the power consumption when the processors are driven. | 04-21-2011 |
| 20110169472 | DC-DC CONVERTERS HAVING IMPROVED CURRENT SENSING AND RELATED METHODS - A DC-DC converter includes a chip including an error amplifier and a pulse width modulator (PWM) having an input connected to an output of the error amplifier, and an inductor driven by said PWM in series with an output node (V | 07-14-2011 |
| 20110241643 | POWER CONTROL DEVICE - A power control device for the load element includes a variable capacitance element connected in parallel with the load element, and a control unit controlling a capacitance of the variable capacitance element and maintaining a degree of a voltage fluctuation due to a parasitic inductance of the line such that the degree of the voltage fluctuation is not more than a certain degree. | 10-06-2011 |
| 20120032662 | REDUCTION OF INRUSH CURRENT DUE TO VOLTAGE SAGS WITH INPUT POWER VOLTAGE RECONNECTION AT ZERO CROSSING - Various systems and methods are provided for minimizing an inrush current to a load after a voltage sag in a power voltage. In one embodiment, a method is provided comprising the steps of applying a power voltage to a load, and detecting a sag in the power voltage during steady-state operation of the load. The method includes the steps of adding an impedance to the load upon detection of the sag in the power voltage, and removing the impedance from the load when the power voltage has reached a predefined point in the power voltage cycle after the power voltage has returned to a nominal voltage. | 02-09-2012 |
| 20120032663 | REDUCTION OF INRUSH CURRENT DUE TO VOLTAGE SAGS WITH TIMING FOR INPUT POWER VOLTAGE RECONNECTION - Various systems and methods are provided for minimizing an inrush current to a load after a voltage sag in a power voltage. In one embodiment, a method is provided comprising the steps of applying a power voltage to a load, and detecting a sag in the power voltage during steady-state operation of the load. The method includes the steps of adding an impedance to the load upon detection of the sag in the power voltage, and removing the impedance from the load when the power voltage has reached a predefined point in the power voltage cycle after the power voltage has returned to a nominal voltage. | 02-09-2012 |
| 20120038342 | VOLTAGE REGULATOR FOR MERCHANDISE DISPLAY SECURITY DEVICE - A voltage regulator for a merchandise display security device provides an appropriate operating voltage through a power cable electrically connected between an alarm sensor and an item of merchandise. The voltage regulator utilizes a feedback signal from a power conversion chip and data from a microprocessor look-up table to adjust the input power to the merchandise. The look-up table stores appropriate operating voltage requirements for each power cable used for different types and brands of merchandise. The type and brand of merchandise is identified by the resistance of the power cable and the feedback signal is modified continuously to maintain power to the merchandise at an appropriate operating voltage. | 02-16-2012 |
| 20120056607 | Power Regulator, Power Control System and Method Thereof - A power regulator, power control system and the method thereof are provided. A detecting device receives a feedback signal from a resistive load device, and outputs a control signal, which could be a voltage or a current. While receiving the control signal, the power regulator outputs a drive voltage in a proportional way. In the proportional way, full power drive voltage is outputted in a continuous output time period and is stopped outputting in a continuous non-output time period. The resistive load device receives the drive voltage and then outputs the feedback signal to the detecting device. Similarly, in the proportional way, the full power drive voltage is outputted in the continuous output time period and is stopped outputting in the continuous non-output time period. Thus, it is able to decrease the amount of harmonic waves. | 03-08-2012 |
| 20120112722 | POWER SUPPLY CIRCUIT - A power supply circuit includes a first-stage circuit and a second-stage circuit. The first-stage circuit is used for converting an input voltage into a DC voltage. The second-stage circuit includes a main power conversion circuit for converting the DC voltage into a first output voltage, a first standby power conversion circuit for converting the DC voltage into a second output voltage, a feedback circuit for generating a feedback signal, a second standby power conversion circuit and a power distribution circuit. The magnitude of the second output voltage is adjusted by the first standby power conversion circuit according to the feedback signal. The second standby power conversion circuit is used for converting the first output voltage or the second output voltage into a standby voltage. The power distribution circuit is used for selectively delivering the first output voltage or the second output voltage to the second standby power conversion circuit. | 05-10-2012 |
| 20120112723 | Loosely Regulated Feedback Control for High Efficiency Isolated DC-DC Converters - The improved DC-DC converter apparatus includes a primary side circuit and a secondary side circuit that is galvanically isolated from the primary. The primary side induces a voltage in the secondary side that provides an output voltage for driving POLs. A controller in the primary senses a reflected output voltage signal that is coupled from the secondary and is proportional to the secondary output voltage with respect to a voltage regulation point determined by either a voltage divider circuit or the zener voltage in the secondary. The voltage regulation point is established by wide-tolerance electrical components, such as a zener diode, a resistor, or a combination, connected in the coupling device circuit. | 05-10-2012 |
| 20120112724 | CHARGE PUMP CIRCUIT AND OPERATION CONTROL METHOD THEREOF - A charge pump circuit which steps down an input voltage inputted from an input terminal and outputs it as a step-down output voltage from a step-down output terminal, and steps up the input voltage and outputs it as a step-up output voltage from a step-up output terminal, includes: a voltage conversion circuit having a flying capacitor, a step-down output capacitor, a step-up output capacitor, and a plurality of switches, wherein the flying capacitor, the step-down output capacitor, the step-up output capacitor, and the switches are connected, and the voltage conversion circuit is capable of switching connection states by switching each on/off state of the switches; an output voltage detection circuit unit which makes a comparison of a voltage between the step-down output voltage and a first predetermined voltage, and makes a comparison of a voltage between the step-up output voltage and a second predetermined voltage, and produces and outputs each signal indicating each result of the comparisons; and a control circuit unit which performs a switching control depending on each signal outputted from the output voltage detection circuit unit. | 05-10-2012 |
| 20120126775 | SWITCHING POWER CONVERTER - A switching power converter including an upper-bridge switch, a lower-bridge switch, an impedance circuit, a first control circuit, a second control circuit and a logic circuit is provided. The impedance circuit generates an output voltage and a sensing current according to a conductive state of the upper-bridge switch and the lower-bridge switch. The first control circuit generates a first pulse signal according to the output voltage. The second control circuit has a first mode and a second mode for generating a second pulse signal and a third pulse signal individually. Furthermore, the second control circuit uses different threshold values in different modes to determine whether to switch the mode thereof, so as to form a hysteretic effect in mode switching. The logic circuit controls the upper-bridge switch by the first pulse signal, and controls the lower-bridge switch by the second pulse signal or the third pulse signal. | 05-24-2012 |
| 20120146611 | Circuit to improve stability of boost-mode converters - Systems and methods for providing a boost converter with an improved stability are disclosed. A sample and hold circuit is connected to the output of the boost converter. That sample and hold circuit holds the output voltage before the main switch of the boost converter turns ON and holds the voltage while the main switch is ON. Thus a high frequency oscillation can be eliminated, an increased control bandwidth without stability problems can be achieved, and no complicated additional circuit is required. | 06-14-2012 |
| 20130141071 | SYSTEM AND METHOD FOR CAPACITIVE DC-DC CONVERTER WITH VARIABLE INPUT AND OUTPUT VOLTAGES - A capacitive voltage converter comprising a switched capacitor array having a voltage input and a voltage output. A skip gating control coupled to the switched capacitor array and configured to control a switching activity of the switched capacitor array. A resistance look-up table coupled to the switched capacitor array and configured to control a resistance value of the switched capacitor array. | 06-06-2013 |
| 20130176012 | METHODS AND APPARATUS FOR SUPPLY VOLTAGE TRANSIENT PROTECTION - Methods and apparatus for an integrated circuit that includes a supply voltage transient detection module to activate a hold signal that causes the output to remain in its present state. In one embodiment, the output remains in that state until the supply voltage returns to a normal operating range and the hold signal transitions to an inactive state. | 07-11-2013 |
| 20130257404 | ANALOG COMPENSATOR CIRCUIT TO COMPENSATE FOR CABLE LOSS - Apparatus, systems and methods for correcting data received from a power cable is presented. A method receives communication data from a near end of a cable that has near and far ends. The data is compared using hysteresis to a high threshold and/or a low threshold. The data is reset to produce corrected data by resetting the data to either a high value or a low value based on the comparing. For example, when the corrected data is high, the data is reset to a low value when the communication data crosses the low threshold and when the corrected data is low, the data is reset to a high value when the communication data crosses the high threshold. The corrected data can provide a power supply data needed so that it can more accurately provide a power through the cable to the far end of the cable. | 10-03-2013 |
| 20130265026 | TRANSMITTING AND RECEIVING ELECTRODE SYSTEM AND POWER TRANSMISSION METHOD USING THE SAME - A transmitting and receiving electrode system, and power transmission method using the same are provided. The transmitting and receiving electrode system includes: a voltage/current detection unit measuring a voltage and a current in real time while power is being transmitted between first and second electrodes; a controller calculating a variable element value based on the voltage and current values transferred from the voltage/current detection unit; and a variable element unit converting a variable element under the control of the controller to adjust an impedance of a power source. | 10-10-2013 |
| 20140009136 | CHARGE PUMP REGULATOR CIRCUIT - A charge pump regulator circuit includes an oscillator and one or more charge pumps. One or more oscillating signals are generated by the oscillator. Each oscillating signal has a frequency or amplitude or both that are variable dependent on a variable drive signal. For some embodiments having multiple oscillating signals, each oscillating signal is phase shifted from a preceding oscillating signal. For some embodiments having multiple charge pumps, each charge pump is connected to receive a corresponding one of the oscillating signals. Each charge pump outputs a voltage and current. For some embodiments having multiple charge pumps, the output of each charge pump is phase shifted from the outputs of other charge pumps. A combination of the currents thus produced is provided at about a voltage level to a load. | 01-09-2014 |
| 20140097821 | CONTROL DEVICE FOR DC-DC CONVERTER AND CONTROL METHOD CONTROLLING THE SAME - A control device for a DC-DC converter, which receives an input power and generates an output voltage, includes a first error amplifier for comparing a reference voltage signal and the output voltage to generate a feedback signal, a sampling and holding control circuit coupled to the first error amplifier for generating a reference current signal according to the feedback signal and an input current associated with the input power, a filter for receiving the input current associated with the input power and generating an average current value according to the input current, a second error amplifier coupled to the sampling and holding and the filter for comparing the reference current signal and the average current value before generating a control signal, and a switching control circuit coupled to the second error amplifier for generating a switching signal according to the control signal from the second error amplifier. | 04-10-2014 |
| 20140111178 | TRANSITIONING FROM ENVELOPE TRACKING TO AVERAGE POWER TRACKING - An envelope tracking power supply and an offset capacitive element are disclosed. The offset capacitive element is coupled between a switching output and an analog output of the envelope tracking power supply, which operates in one of an envelope tracking mode, a transition mode, and an average power tracking mode. During the envelope tracking mode, the envelope tracking power supply provides an envelope power supply signal using both the switching output and the analog output. During the transition mode, the envelope tracking power supply drives a voltage across the offset capacitive element from a first voltage to a second voltage, such that during a transition from the envelope tracking mode to the transition mode, the offset capacitive element has the first voltage, and during a transition from the transition mode to the average power tracking mode, the offset capacitive element has the second voltage. | 04-24-2014 |
| 20140218002 | POWER SYSTEM AND CONTROL METHOD THEREOF - The present invention provides a power system and controlling method thereof. The power system includes: pulse width modulation (PWM) power source, voltage detection unit, current detection unit and feedback signal generation unit. PWM power source receives external DC input, performs PWM on received external DC input, and supplies PWM output obtained through PWM from the DC output terminal to a device expecting power supply. Voltage detection unit detects voltage amplitude of PWM output. Current detection unit detects current amplitude of PWM output. Feedback signal generation unit generates feedback signal and supplies generated feedback signal to PWM power source. PWM power source adjusts the voltage amplitude and current amplitude of the PWM output based on the received feedback signal. | 08-07-2014 |
| 20140253084 | POWER CONVERTER CONTROL CIRCUIT - A power converter control circuit includes a feedback circuit and a pulse width modulation signal generating circuit for configuring a power stage circuit to provide power to a load. The feedback circuit generates a first gain signal and a second gain signal according to an output voltage sensing signal coupled with the load. The feedback circuit further generates a feedback signal according to the first gain signal and the second gain signal. The pulse width modulation signal generating circuit configures the operation of the power stage circuit according to the feedback signal and a reference signal. Moreover, the feedback circuit and the pulse width modulation signal generating circuit are configured on the same integrated circuit package. | 09-11-2014 |
| 20140375293 | Capacitive Regulation of Charge Pumps Without Refresh Operation Interruption - In a charge pump system using a capacitive voltage divider, or other feedback circuit requiring periodic refreshing, in order to refresh the circuit, system operations would typically need to be suspended in order to refresh the capacitors if charge leakage begins to affect the output level. This can lead to delay and power inefficiencies. To overcome this, two feedback circuits are used so that while one is active, the other can have its capacitors' state refreshed. By alternating the two networks, delay can be avoided and power use reduced. | 12-25-2014 |
| 20150054483 | LOAD BANK PROVIDING CONSTANT POWER - An adjustable load bank provides a load to a power source that is able to maintain a constant power and constant current as well as power factor control. The load bank utilizes various resistive and inductive elements that may be connected or disconnected as required. In operation, the load bank continuously monitors the voltage and current across the resistive and inductive elements and applies or subtracts elements as necessary via control signals in order to maintain the desired fixed total power dissipated by the load bank. | 02-26-2015 |
| 20150097545 | ADAPTIVE POWER ADJUSTMENT FOR CURRENT OUTPUT CIRCUIT - A circuit includes an output current circuit that employs a regulated voltage to provide an output voltage to drive a load current through an output load resistor. A load resistance sensor (LRS) senses the resistance of the output load resistor based on the output voltage and the load current. A controller provides a sense voltage control command to set the regulated voltage to an initial sense voltage during a sense mode. The initial sense voltage adjusts the output voltage of the output current circuit and enables the LRS to sense the resistance of the output load resistor at a given setting of the load current. The controller provides a clamp control command based on the sensed resistance of the output load resistor to set the regulated voltage to a fixed regulated voltage during an operation mode. The fixed regulated voltage enables the output current circuit to supply a predetermined maximum load current to the output load resistor at a predetermined minimum setting of the output voltage. | 04-09-2015 |
| 20150123638 | STARTUP CLAMP CIRCUIT FOR NON-COMPLIMENTARY DIFFERENTIAL PAIR IN DCDC CONVERTER SYSTEM - A DCDC converter includes a transconductance amplifier, a comparator, a current driving component, an output impedance, a switch, a clamp resistor and a p-channel FET. The transconductance amplifier outputs a transconductance current and a switch control signal. The comparator has a two n-channel FET inputs forming a differential pair and outputs a compared signal. The current driving component generates an output current based on the compared signal. The output impedance component generates an output DC voltage based on the output current. The switch is between the two n-channel FETs and can open and close based on the switch control signal. The clamp resistor is arranged in series with the switch. The p-channel FET is in series with the clamp resistor and is controlled by the output DC voltage. | 05-07-2015 |
| 20160056713 | ELECTRICAL POWER SUPPLY - A method supplies power from a power source to a load. The method includes, in a first mode, electrically coupling a step-down converter node of a step-down converter alternately to the power source via a conductive bypass path that bypasses a step-up converter and to ground. The step-up converter has an input electrically coupled to the power source and the step-down converter has an output electrically coupled to the load. The method further includes, in a second mode, coupling the step-down converter node alternately to the power source via the bypass path and to an output of the step-up converter. | 02-25-2016 |
| 20220139607 | FABRICATION OF AN INTEGRATED TRANSFORMER - An integrated transformer is disclosed. The integrated transformer includes a magnetic core situated in a first layer from among multiple layers of a semiconductor layer stack, a first conductor and a second conductor from among multiple conductors, and a via. The first conductor is situated within a second layer, above the first layer, from among the multiple layers of the semiconductor layer stack. The second conductor is situated within a third layer, below the first layer, from among the multiple layers of the semiconductor layer stack. The via physically and electrically connects the first conductor and the second conductor. The via, the first conductor, and the second conductor form a primary winding of the integrated transformer. The integrated transformer additionally includes a secondary winding, wrapped around the magnetic core, situated in the first layer, the second layer, and the third layer. | 05-05-2022 |
| 323294000 | Hall effect device, magnetoresistor or thermistor | 1 |
| 20120161741 | CURRENT GENERATOR FOR TEMPERATURE COMPENSATION - A current generator includes a thermistor configured to receive an input current, a reference resistor of a value substantially corresponding to a resistance of said thermistor at a reference temperature, a current mirror configured to generate a mirrored current proportional to said input current, a feedback circuit configured to generate an output compensation current proportional to a difference between voltages on said reference resistor and on said thermistor, and a first adder configured to force through said reference resistor a difference current between said mirrored replica current and said output compensation current. | 06-28-2012 |
| 323297000 | Plural selective resistors | 5 |
| 20090079411 | VOLTAGE DIVIDING CIRCUIT AND MAGNETIC SENSOR CIRCUIT - To provide a variable voltage dividing circuit capable of changing voltage values of a detection point and a release point along with a change in power supply voltage without changing a hysteresis width. The variable voltage dividing circuit according to the present invention includes: a voltage dividing unit which includes a resistor string formed of a plurality of resistors connected in series, and outputs divided voltages divided at connection points of the plurality of resistors, one end of the resistor string being applied with a first voltage, another end thereof being applied with a second voltage; a first constant current source connected to a first connection point of the resistor string; and a second constant current source connected to a second connection point located symmetrically to the first connection point with respect to a center of the resistor string in the resistor string, in which, in accordance with a voltage difference between the first voltage and the second voltage, any one of the first constant current source and the second constant current source subtracts a first adjustment current from a current flowing through the resistor string, and another thereof feeds a second adjustment current to the resistor string. | 03-26-2009 |
| 20100060253 | Pre-Biased Circuit for Synchronous Rectified Power Converters - The present invention relates to voltage converters and especially to a control circuit with an input from the voltage converter output and arranged to control the voltage level on the voltage converter output. The problem addressed relates to the situation when there is a pre-bias voltage on the converter output at the moment it is switched on. The object of the control circuit is to increase the voltage on the converter output fast and avoiding any drain of voltage or current from the output at the start up sequence. This is performed by a comparator in the control circuit that is arranged to compare the reference voltage with a division of the output voltage and if the reference voltage is lower that the divided output voltage the reference voltage is increased at the comparator output. The comparator circuit includes an OP-amplifier. | 03-11-2010 |
| 20120112725 | Circuit and Method for Voltage Regulator Output Voltage Trimming - The present disclosure discloses a voltage regulator comprising a trimming circuit. The present disclosure also discloses a method for trimming an output voltage of a voltage regulator. In one embodiment the voltage regulator may comprise a power conversion module, a feedback and trimming module and a control module. The voltage regulator may be able to provide an output voltage that could be regulated to a plurality of output values, the feedback and trimming module may be able to trim the plurality of output values to their desired values successively and independently. | 05-10-2012 |
| 20120153923 | METHOD AND APPARATUS FOR SUPPLYING POWER TO 300 PIN MSA 40GB TRANSPONDER - A method and an apparatus for supplying power to a 300 PIN MSA 40 Gb TRANSPONDER ( | 06-21-2012 |
| 20160116930 | CURRENT GENERATOR AND METHOD OF OPERATING - A current generator includes an amplifier having a first terminal configured to receive a first voltage, a tunable resistance circuit coupled to an output terminal of the amplifier through a first transistor, a calibration circuit coupled to the tunable resistance circuit, and a second transistor. The second transistor includes a gate terminal coupled to the output terminal of the amplifier and a drain terminal coupled to a load. The calibration circuit is configured to adjust a resistance setting of the tunable resistance circuit. | 04-28-2016 |
| 323298000 | Variable resistor | 10 |
| 20080297129 | HIGH-VOLTAGE POWER SUPPLY APPARATUS AND IMAGE FORMING APPARATUS EMPLOYING SAME - The voltage at a spurious frequency is decreased while maintaining as much as possible the voltage at a resonance frequency of a piezoelectric transformer, thus controlling a wide voltage range with a comparatively low cost configuration. A high-voltage power supply apparatus includes a piezoelectric transformer that outputs a highest voltage at a predetermined resonance frequency, and a generating unit that generates a signal that oscillates at a drive frequency that drives the piezoelectric transformer, throughout a frequency range that includes the resonance frequency. Furthermore, the high-voltage power supply apparatus includes an output terminal connected to the piezoelectric transformer, and a constant-voltage element inserted in a path that couples the piezoelectric transformer and the output terminal. | 12-04-2008 |
| 20100026269 | Output voltage compensation device - An output voltage compensation device has a Bark converter, a current detection resistance, a sense resistance, a voltage feedback circuit and a Pulse Width Modulation (PWM) controller. The current detection resistance is series connected with an output end of the Bark converter. Voltage at a front end of the current detection resistance is detected by the sense resistance, and compares with actual output voltage. Based on the compared result, the PWM controller adjusts work cycle of the Bark converter for voltage compensation. | 02-04-2010 |
| 20100127686 | POWER AUTO-DETECTION APPARATUS - A power auto-detection apparatus is applied to a power supply of a personal computer or applied to an adapter of a notebook computer. The power auto-detection apparatus has a voltage stabilizing unit, an over-current protective unit, a voltage regulating unit, a signal processing unit, and a regulating resistor. The over-current protective unit provides an over-current protection for the power auto-detection apparatus. The voltage regulating unit electrically connects to a non-ground terminal of the regulating resistor and outputs a first regulating voltage and a second regulating voltage. The signal processing unit electrically connects the voltage regulating unit and receives the second regulating voltage to output a power detection signal to the computer system to automatically detect the output power of the power supply or the adapter. | 05-27-2010 |
| 20100164463 | VOLTAGE GENERATOR WITH CURRENT LIMITING AND SEMICONDUCTOR TESTING DEVICE - A voltage generator with current limiting generates a voltage to be fed to a load of which load current is limited. The voltage generator includes an operational amplifier; an output resistance connected between an output terminal of the operational amplifier and a load connecting terminal; a feedback resistor connected between the load connecting terminal and an inverting input terminal of the operational amplifier; a first clamper connected between the output terminal of the operational amplifier and the inverting input terminal of the operational amplifier; and a second clamper connected between the load connecting terminal and a non-inverting input terminal of the operational amplifier and configured with diodes. The first clamper generates a predetermined constant voltage, limits a current flowing into the output resistance, and varies the generated constant voltage. The first clamper has a predetermined abrupt current-voltage characteristic. | 07-01-2010 |
| 20110169473 | MIX MODE WIDE RANGE DIVIDER AND METHOD THEREOF - A mix mode wide range divider is provided for dividing a first signal by a second signal to generate an output signal. A third signal is generated depending on the resistance of a first adjustable resistor, and a fourth signal is generated according to the third signal and a target value determined by the second signal, to adjust the resistance of the first adjustable resistor and the resistance of a second adjustable resistor. The resistance of the first adjustable resistor is so adjusted to make the third signal equal to the target value, and the resistance of the second adjustable resistor is so adjusted to maintain a ratio of the resistance of the second adjustable resistor to the resistance of the first adjustable resistor. The output signal is generated depending on the first signal and the resistance of the second adjustable resistor. | 07-14-2011 |
| 20110316512 | VOLTAGE TRIMMING - Embodiments are provided that include a memory die, memory devices, and methods, such as those comprising a voltage generator, including an output voltage and an adjustment circuit configured to cause adjustment of the output voltage based on a latch signal. Further one such method includes applying an input voltage to an input of a voltage generator, adjusting the input voltage to an adjusted voltage, comparing the adjusted voltage to a reference voltage, generating trim data based on the comparison and storing the trim data. | 12-29-2011 |
| 20120212206 | ELECTRONIC DEVICE FOR OPTIMIZING THE OUTPUT POWER OF A SOLAR CELL AND METHOD FOR OPERATING THE ELECTRONIC DEVICE - An electronic device for optimizing the output power of a solar cell, the electronic device having: a variable resistor coupled in series between the solar cell and a load, a control unit that is configured to control the variable resistor, a sensor for measuring an output voltage and a sensor for measuring the output current of the solar cell, wherein the control unit is configured to vary the resistance of the series resistor over time such that the first order derivative of the output voltage over time has a constant value, to monitor the second order derivative of the output current over time simultaneously, to detect whether the second order derivative of the output current over time exceeds a predetermined threshold value and to identify the corresponding values of the output voltage and current as a maximum power point (MPP) of the solar cell. | 08-23-2012 |
| 20130193944 | VOLTAGE GENERATOR - According to one embodiment, a voltage generator includes a step-up circuit and a limiter circuit. The step-up circuit outputs a first voltage to a first node. The limiter circuit includes first and second resistive elements, first and second capacitive elements, a switch element, and a comparator. The first resistive element is between the first node and a second node. The second resistive element is connected to the second node. The first capacitive element is between the first and second nodes. The switch element connects the second capacitive element to the second node at the same time that the first node is connected to a load. The comparator compares the potential at the second node with a reference potential. | 08-01-2013 |
| 20140043006 | POWER SUPPLY SYSTEMS AND METHODS - Aspects include power supply systems. An error amplifier can generate an error voltage based on feedback associated with an output voltage to a reference voltage. A PWM generator can generate a PWM signal based on the error voltage. A power stage can generate the output voltage based on the PWM signal. The power stage can include a transconductance amplifier that generates a temperature-compensated sense current associated with a magnitude of an output current. An output voltage tuning circuit sets a desired magnitude of the output voltage based on at least one digital signal to adjust the reference voltage and the feedback voltage. An oscillator system generates a clock signal based on repeatedly charging and discharging a capacitor based on the clock signal and a comparator that compares the capacitor voltage and a second voltage having a magnitude that changes based on the state of the clock signal. | 02-13-2014 |
| 20150077084 | HIGH CURRENT EVENT MITIGATION CIRCUIT - A protection circuit includes a first resistive element configured for coupling to a protected circuit. The first resistive element has a particular resistance value. The protection circuit also includes a voltage regulator coupled to the first resistive element. The particular resistance value is selected to enable a magnitude of a bias current provided to the protected circuit to remain within a first operating current range associated with the protected circuit and to remain below a latchup holding current value associated with the protected circuit. | 03-19-2015 |
