Entries |
Document | Title | Date |
20080197822 | Variable Gain Amplifier and Ac Power Supply Device Using the Same - A variable gain amplifier includes first and second power supply terminals arranged to be connected to a power supply, a transconductance amplifier, first and second PN junction elements, a voltage drop element, first and second resistors, a current-generating transistor, and a current mirror. The transconductance amplifier outputs a current corresponding to a difference between a potential of a base of the first initial stage transistor and a potential of a base of the second initial stage transistor. An emitter of the second initial stage transistor is connected to the emitter of the first initial stage transistor at a node. Each of the first and second PN junction elements has a first end connected to the base of the first initial stage transistor and a second end. The voltage drop element is connected between the second end of the first PN junction element and the first power supply terminal. The first resistor is connected between the base of the second initial stage transistor and a first signal source which is a voltage source. The current-generating transistor has a collector connected to the base of the first initial stage transistor and a base connected to the first signal source. The second resistor is connected between the emitter of the current-generating transistor and the second power supply terminal. The current mirror is connected to the node, and allows a current to flow to the node, the current being identical to a current flowing from the second signal source which is a current source. This variable gain amplifier generates no non-linear distortion, and has a small size. | 08-21-2008 |
20080218135 | Voltage Supplying Device and an Image Display Device - To provide a voltage supplying device and an image display device, which can bring a voltage on a line to be supplied with voltage (e.g. source line) to a substantially desired voltage. A voltage supplying device comprising a source line (L | 09-11-2008 |
20080238379 | Pulse frequency to voltage conversion - A power supply apparatus and method of regulating is provided. A converter circuit includes a primary switching element and an auxiliary switching element. The auxiliary switching element is for transferring a reflected voltage signal. A transformer includes a primary and a secondary, the primary is coupled with the converter circuit. The primary and secondary each include a single winding. An output rectifier circuit is coupled with the secondary of the transformer. A resonant circuit is included in the converter circuit and is coupled with the primary. The resonant circuit includes one or more resonance capacitors that are configured for providing a transformer resonance. The transformer resonance comprises the reflected voltage signal, the capacitance of the one or more resonance capacitors and a parasitic capacitance of the transformer. The reflected voltage signal is reflected from the secondary to the primary. The resonant circuit converts a pulse train to produce a voltage potential, the voltage potential varying in proportion to an output voltage, the pulse train comprising a duty cycle proportional to a load current. A virtual output voltage feedback loop is provided. The converter circuit is responsive to a virtual output voltage reference signal in regulating an output voltage. | 10-02-2008 |
20080265850 | CURRENT SENSOR DEVICE - A current sensor senses the current at a sense transistor and generates an output current that is an accurate proportional representation of the current at the sense transistor. Furthermore, the sensed current is relatively independent of the resistive load of the feedback path at feedback control module to which it is applied. In one embodiment, the feedback control module uses the sensed current in a DC-DC voltage converter to regulate a voltage. The current sensor employs a pair of operational amplifiers to match a voltage at a current electrode of a transistor that generates the output current to a voltage at a current electrode of the sense transistor, such that an effective resistance of the transistor generating the output current is significantly higher than the resistive load of the feedback control module, thereby ensuring that the output current is relatively independent of the resistive load of the feedback control module. | 10-30-2008 |
20090115380 | Internal voltage generator - An apparatus for generating an internal voltage includes an output-voltage detecting unit for detecting a voltage level of an internal voltage, an oscillating unit for generating a periodic signal in response to a detection signal from the output-voltage level detecting unit, a first driving-voltage level detecting unit for detecting an increase of a voltage level of a driving voltage, a second driving-voltage level detecting unit for detecting a decrease of a voltage level of the driving voltage, a period control unit for controlling a period of the periodic signal in response to output signals of the first and second driving-voltage level detecting units, and a charge pumping unit for generating the internal voltage by charge-pumping the driving voltage in response to an output signal from the period control unit. | 05-07-2009 |
20090184696 | VOLTAGE SOURCE FOR GATE OXIDE PROTECTION - An electronic circuit. The electronic circuit includes a first circuit leg coupled to a first supply voltage node and a second supply voltage node. The first circuit leg includes a first reference current circuit configured to produce a first reference current and a second reference current circuit configured to produce a second reference current. The electronic circuit further includes a second circuit leg coupled in parallel with the first circuit leg. The second circuit leg includes a first transistor coupled to form a current mirror with the first reference current circuit and a second transistor coupled to form a current mirror with the second reference current circuit. The source terminals of each of the first and second transistors are coupled together to form a third supply voltage node | 07-23-2009 |
20090243566 | Converter Arrangement and Method for Preparing a Converted Signal - A converter arrangement includes a converter device ( | 10-01-2009 |
20090273323 | SERIES REGULATOR WITH OVER CURRENT PROTECTION CIRCUIT - A series regulator with an over current protection circuit regulates output current at an output terminal by controlling an output transistor. There is a current sense transistor with a conductivity that is dependent on the conductivity of the output transistor. A current limiting transistor is connected between an input power supply terminal and a differential amplifier output that controls the conductivity of the output transistor. A current supply source provides current to a constant current source and a converter output of a current to voltage converter. The converter output is connected to a control electrode of the current limiting transistor. A first differential transistor couples the current sense transistor to the constant current source and a second differential transistor couples the current supply source to the constant current source. In operation, the current sense transistor controls the conductivity of the second differential transistor thereby varying a control current supplied from the current supply source to the constant current source. When the control current matches a limiting threshold value, a voltage control signal at the converter output controls the current limiting transistor to thereby limit maximum current flow through the output transistor. | 11-05-2009 |
20090278514 | Feedback power control system for an electrical component - A feedback power control system includes: a multiplying unit receiving a work voltage corresponding to a voltage drop of an electrical component, and a feedback voltage corresponding to a work current flowing through the electrical component, and outputting a measuring voltage corresponding to a consumed power of the electrical component and having a value equal to a product of a value of the work voltage and a value of the feedback voltage; a control unit receiving the measuring voltage from the multiplying unit, and a reference voltage, and outputting a control voltage corresponding to a voltage difference between the measuring voltage and the reference voltage; and a regulating unit providing the feedback voltage to the multiplying unit, and including an amplifier that receives the feedback voltage from a series connection of transistor and a resistor coupled to the electrical component, and the control voltage from the control unit and that controls operation of the transistor. | 11-12-2009 |
20090295344 | POWER-REGULATOR CIRCUIT HAVING TWO OPERATING MODES - Embodiments of a power-regulator circuit having two operating modes are described. This power-regulator circuit includes control logic that is configured to select a given operating mode based on a load condition of the power-regulator circuit. During a first operating mode, the control logic provides a first signal that operates the power-regulator circuit as a linear regulator. Moreover, during a second operating mode, the control logic provides a second signal and a third signal that operate the power-regulator circuit as a switch-mode regulator. | 12-03-2009 |
20090295345 | Voltage regulator - Provided is a voltage regulator which can achieve high-speed response and is not susceptible to a ripple. An amplifier ( | 12-03-2009 |
20090309559 | AUTOMATICALLY CONFIGURABLE DUAL REGULATOR TYPE CIRCUITS AND METHODS - Automatically configurable dual regulator type circuits and methods are provided. On embodiment of the invention includes an automatically configurable dual regulator type circuit. The circuit comprises a high-side switching device (HS-SD) coupled to a low-side switching device (LS-SD) at an output node. The circuit further comprises a control logic device that turns on the HS-SD to provide an output current to a user selected circuit configuration through the output node, turns off the HS-SD after a voltage fed back from an output terminal of the user selected circuit configuration exceeds a first threshold and sets a regulator type configuration mode based on the presence or absence of a flyback period at the output node after the HS-SD has been turned off. | 12-17-2009 |
20100109620 | Semiconductor Body and Method for Voltage Regulation - A semiconductor body ( | 05-06-2010 |
20100207591 | VOLTAGE REGULATOR - To provide a voltage regulator having low current consumption. | 08-19-2010 |
20100259233 | Direct Current Converter - A direct current converter includes a first node, a second node, an input voltage terminal, an output voltage terminal, a bootstrap source terminal, a low-voltage terminal, a control module for generating a control signal, a driving-stage circuit coupled to the input voltage terminal, the first node, the second node, the control module, and the low-voltage terminal, an output-stage circuit coupled to the second node and the output voltage terminal, and a bootstrap circuit including a capacitor coupled between the first node and the second node, a fault detector for outputting a switch signal, and a cascade unit coupled to the bootstrap source terminal, the first node, the control module, and the fault detector for controlling connection between the bootstrap source terminal and the first node according to the switch signal and the control signal. | 10-14-2010 |
20110031945 | THRESHOLD VOLTAGE EXTRACTION CIRCUIT - A pair of MOS transistors ( | 02-10-2011 |
20110057633 | Load driving circuit - Provided is a circuit capable of further reducing noise that increases along with an amplitude of a flow-through current flowing through a charge pump circuit. A load driving circuit includes: an output MOS transistor | 03-10-2011 |
20110074369 | SEMICONDUCTOR APPARATUS AND CALIBRATION METHOD THEREOF - A semiconductor apparatus includes a reference voltage generation unit, a comparison voltage generation unit, and a calibration unit. The reference voltage generation unit is disposed in a reference die and configured to generate a reference voltage. The comparison voltage generation unit is disposed in a die stacked on the reference die and configured to generate a comparison voltage in response to a calibration control signal. The calibration unit is configured to compare a level of the reference voltage with a level of the comparison voltage and generate the calibration control signal. | 03-31-2011 |
20110121797 | DELAY COMPENSATION FOR A DC-DC CONVERTER - A method of controlling a DC-DC converter is disclosed, which provides for compensation of the loop-delay caused by, for instance, delays in operation of the comparator. The method is exemplified with reference to, but not limited to, a hysteretic converter. | 05-26-2011 |
20110133706 | DC CONVERTER CIRCUIT AND POWER SUPPLY CIRCUIT - A DC converter circuit having high reliability is provided. The DC converter circuit includes: an inductor configured to generate electromotive force in accordance with a change in flowing current; a transistor including a gate, a source, and a drain, which is configured to control generation of the electromotive force in the inductor by being on or off; a rectifier in a conducting state when the transistor is off; and a control circuit configured to control on and off of the transistor. The transistor includes an oxide semiconductor layer whose hydrogen concentration is less than or equal to 5×10 | 06-09-2011 |
20110133707 | STABLE LOW DROPOUT VOLTAGE REGULATOR - A Low-dropout (LDO) voltage regulator ( | 06-09-2011 |
20110148369 | Device and Method for Converting a Potential - A potential converter device with a first storage capacitor implemented to be supplied with energy from an energy source to acquire a first potential form at the first storage capacitor, and a second storage capacitor implemented to be supplied with energy from the first storage capacitor to acquire a second potential form at the second storage capacitor. The potential converter device further has a converter electrically connected between the first and second storage capacitors and implemented to execute an energy transmission from the first storage capacitor to the second storage capacitor if the first potential form reaches a first potential threshold value and until the first potential form reaches a second potential threshold value, wherein the first potential threshold value is greater regarding its magnitude than the second potential threshold value. | 06-23-2011 |
20110156667 | VOLTAGE REGULATOR WHICH PROVIDES SEQUENTIALLY AND ARBITRARRILY SHAPED REGULATED VOLTAGE AND RELATED METHOD - A voltage regulator includes an amplifier, a power device, a delay signal generator, and a voltage-generating circuit. The amplifier generates a control signal according to a reference voltage and a feedback voltage. The power switch generates the output voltage by regulating the output current according to the switch control signal. The delay signal generator generates a plurality of sequential delay signals each having distinct delay time with respect to an externally applied power-on burst signal. The voltage-generating circuit provides an equivalent resistance for generating the feedback voltage corresponding to the output voltage, and regulates the output voltage by adjusting the equivalent resistance according to the plurality of sequential delay signals. | 06-30-2011 |
20110187334 | POWER SUPPLY CIRCUIT AND ELECTRONIC DEVICE - A power supply circuit | 08-04-2011 |
20120025790 | ELECTRONIC CIRCUIT, CIRCUIT APPARATUS, TEST SYSTEM, CONTROL METHOD OF THE ELECTRONIC CIRCUIT - An electronic circuit includes: a first power line capable of supplying power; a second power line capable of supplying power independently from the first power line; a main circuit connected to the second power line; a detector that detects the supply of power from the first power line or the second power line; and a controller connected to the first power line and the second power line, wherein the controller controls a voltage or a current supplied from the first power line and supplies the voltage or the current to the main circuit when the detector detects supply of power from the first power line. | 02-02-2012 |
20120086416 | POWER SUPPLY DEVICE - Miniaturization of a multiphase type power supply device can be achieved. A power supply control unit in which, for example, a microcontroller unit, a memory unit and an analog controller unit are formed over a single chip, a plurality of PWM-equipped drive units, and a plurality of inductors configure a multiphase power supply. The microcontroller unit outputs clock signals each having a frequency and a phase defined based on a program on the memory unit to the respective PWM-equipped drive units. The analog controller unit detects a difference between a voltage value of a load and a target voltage value acquired via a serial interface and outputs an error amp signal therefrom. Each of the PWM-equipped drive units drives each inductor by a peak current control system using the clock signal and the error amp signal. | 04-12-2012 |
20120098506 | Low Noise Current Buffer Circuit and I-V Converter - A low noise current buffer circuit includes a first transistor, for receiving an input current, a second transistor, for draining a first current from a drain of the second transistor according to the input current received by the first transistor, a third transistor, for outputting first current, a fourth transistor, for outputting a second current to an output resistor, to generate an output voltage, and a feedback capacitor, for eliminating impacts of noise of a system voltage on the output voltage. | 04-26-2012 |
20120105027 | HIGH EFFICIENCY, THERMALLY STABLE REGULATORS AND ADJUSTABLE ZENER DIODES - This document discusses, among other things, apparatus for high-efficiency, thermally-compensated regulators. In an example, a regulator can include a zener diode having a first temperature coefficient, the zener diode configured couple to an output and to provide at least a portion of a reference voltage, a transistor having a second temperature coefficient, the transistor configured to receive the reference voltage, to receive a representation of the output, and to provide feedback information indicative of an error of the output using the representation of the output voltage and the reference voltage, and wherein the first temperature coefficient and the second temperature coefficient are configured to reduce at least a portion of a temperature drift effect of the zener diode and the transistor. | 05-03-2012 |
20120146595 | REGULATOR WITH HIGH PSRR - A regulator for providing a low dropout voltage at an output node of the regulator is provided. An amplifier has a non-inverting input terminal for receiving an input voltage, an inverting input terminal and an output terminal. A first resistor is coupled between a ground and the inverting input terminal of the amplifier. A second resistor is coupled to the inverting input terminal of the amplifier. A first transistor is coupled between a voltage source and the second resistor. A current source coupled between the voltage source and a gate of the first transistor provides a bias current. A second transistor coupled between the first transistor and a current mirror has a gate coupled to the output terminal of the amplifier. The first and second transistors are different type MOS transistors. The replica unit generates the low dropout voltage according to a voltage of the output terminal of the amplifier. | 06-14-2012 |
20120146596 | VOLTAGE CONVERTER - A voltage converter includes a voltage converting circuit, a pulse width modulation (PWM) controller, a feedback circuit, an adjusting circuit, and a measuring circuit. The voltage converting circuit converts an input voltage to a low output voltage for a load. The PWM controller includes a comparator and a triangular-wave oscillator. The comparator is connected to the voltage converting circuit and outputs a PWM voltage to the voltage converting circuit. The triangular-wave oscillator is connected to an inverting terminal of the comparator, and outputs a sawtooth-wave voltage to the comparator. The feedback circuit is connected to a non-inverting terminal of the comparator and outputs a feedback voltage to the comparator. The measuring circuit measures current output from the voltage converting circuit and controls the adjusting circuit to provide a pull-up voltage to the triangular-wave oscillator when the measured current decreases, thereby increasing the duty ratio of the PWM voltage. | 06-14-2012 |
20120146597 | POWER SUPPLY APPARATUS - A load capacitor is connected to a power supply terminal of a DUT. A current detection unit detects an output current output from a power supply apparatus. A nonlinear control unit controls its output amount so as to provide a balance between an amount of charge with which the load capacitor is charged or discharged in a first period, from a first timing at which a change occurs in a load current that flows into the power supply terminal of the DUT until a second timing at which the load current matches the output current, and an amount of charge with which the load capacitor is charged or discharged in a second period, from the second timing until a third timing at which the control operation ends. | 06-14-2012 |
20120169303 | VOLTAGE REGULATOR - A voltage regulator includes a constant voltage power circuit and an overcurrent protection circuit. The constant voltage power circuit generates an output voltage, an output current and a divided voltage. The overcurrent protection circuit includes a current sensing unit, a first mirroring unit, a voltage to current converting unit, a second mirroring unit, and a pull up unit. The current sensing unit generates a sensing current according to the output current. The first mirroring unit generates a first mirroring current. The first mirroring current is proportional to the output current. The voltage to current converting unit is used for converting the divided voltage into a first current. | 07-05-2012 |
20120194147 | VOLTAGE REGULATOR - Provided is a voltage regulator capable of enabling overcurrent protection in a state in which an output current is large even if an input/output voltage difference is small, without waiting until the output voltage decreases. A sense current that a sense transistor flows is detected by a differential amplifier circuit, and hence, in the state in which the input/output voltage difference is small and the output current is large, the overcurrent protection can be enabled even when the output voltage does not decrease. Further, a good fold-back characteristic can be obtained. | 08-02-2012 |
20120200272 | SHUNT REGULATOR FOR HIGH VOLTAGE OUTPUT USING INDIRECT OUTPUT VOLTAGE SENSING - Embodiments disclosed herein provide for a voltage regulator having one or more Zener diodes coupled in series between an output voltage and system ground. The one or more Zener diodes are in a reverse biased configuration. A transistor is coupled in series with the one or more Zener diodes between the one or more Zener diodes and system ground. A control circuit is coupled to the transistor and configured to adjust the transistor to control a voltage level of the output voltage. The control circuit is configured such that transistor is adjusted substantially independent of values of the one or more Zener diodes. | 08-09-2012 |
20120249098 | CIRCUITS AND METHODS FOR CURRENT SENSING - A circuit includes a first resistor, a second resistor, a voltage follower and a current mirror. The first resistor converts a current flowing through the first resistor to a voltage drop between positive and negative sides of the first resistor. The second resistor is coupled to the negative side of the first resistor. The voltage follower is coupled to the positive side of the first resistor via a non-inverting terminal, and coupled to the negative side of the first resistor through the second resistor via an inverting terminal to cause a voltage at the inverting terminal to follow a voltage at the non-inverting terminal. The current mirror is coupled to the voltage follower to provide a sensing current proportional to the current flowing through the first resistor. | 10-04-2012 |
20120256604 | POWER REGULATION CIRCUIT AND ELECTRONIC DEVICE WITH THE SAME - A power regulation circuit is connected to a voltage supply unit for receiving a power-on voltage supplied by the voltage supply unit and to a voltage management unit for enabling an enable port thereof. The power regulation circuit includes a first regulation unit and the second regulation unit. The first regulation unit is used for outputting an enable signal to the enable port when the power-on voltage is lower than a threshold value such that the voltage management unit can output a first working voltage to a load via a first output port thereof. The first regulation unit stops outputting the enable signal after the expiry of a certain period of time following the drop in a power supply to a level which is below a certain threshold value for a predetermined period. | 10-11-2012 |
20120256605 | BAND-GAP VOLTAGE GENERATOR - A generator of a voltage logarithmically variable with temperature may include a differential amplifier having a pair of transistors, each coupled with a respective bias network adapted to bias in a conduction state the transistors first and second respectively with a constant current and with a current proportional to the working absolute temperature. The pair of transistors may generate between their control nodes the voltage logarithmically variable with temperature. The differential amplifier may have a common bias current generator coupled between the common terminal of the differential pair of transistors and a node at a reference potential, and a feedback line to provide a path for the current difference between the sum of currents flowing through the transistors of the differential pair and the common bias current. | 10-11-2012 |
20120293143 | Method and Device for Generating an Adjustable Bandgap Reference Voltage - Generating an adjustable bandgap reference voltage comprises generating a current proportional to absolute temperature comprising an equalization of the voltages across the terminals of a core designed to then be traversed by the said current proportional to absolute temperature, generating a current inversely proportional to absolute temperature, summing these two currents and generating said bandgap reference voltage on the basis of the said sum of currents; the said equalization comprises a connection across the terminals of the core of a first fed-back amplifier possessing at least one first stage arranged as a folded setup and comprising first PMOS transistors arranged according to a common-gate setup, and a biasing of the said first stage on the basis of the said current inversely proportional to absolute temperature, the said summation of the two currents being performed in the feedback stage of the first amplifier. | 11-22-2012 |
20130021007 | SWITCHING POWER SOURCE CIRCUIT - A switching power source circuit includes a first reactor having coils L | 01-24-2013 |
20130027007 | AMPLIFIER WITH MULTIPLE ZERO-POLE PAIRS - An amplifier is disclosed. In accordance with some embodiments of the present disclosure, an amplifier may comprise a differential pair comprising a first transistor and a second transistor, wherein the first transistor comprises a first portion and a second portion, a first compensation circuit comprising a first terminal coupled to the first portion of the first transistor and a second terminal coupled to the second transistor, and a second compensation circuit comprising a first terminal coupled to the second portion of the first transistor and a second terminal coupled to the second transistor and the second terminal of the first compensation circuit. | 01-31-2013 |
20130027008 | START-UP CIRCUIT - The present relates to a start-up circuit, which is used for starting up a variable power supply circuit, which comprises a detection circuit and a transition circuit. The detection circuit is used for detecting an output voltage of the variable power supply and producing a detection signal. The transition circuit is coupled to the detection circuit. It transits the level of the detection signal and produces a control signal for starting up or cutting off the variable power supply. Thereby, the problem of incapability in transition can be avoided as well as achieving the purpose of low power consumption. | 01-31-2013 |
20130033241 | DC-DC CONVERTER CAPABLE OF CONFIGURING TOPOLOGY - Disclosed is a DC-DC converter including: a switch unit controlling a flow of a current based on a buck-boost topology; a short circuit unit short circuited or opened according to an external setting to change a topology of the switch unit; an inductor storing a current induced by the switch unit; a topology selecting unit selecting a topology in response to an external input signal and generating a signal corresponding to the selected topology; a pulse width modulating unit generating a signal for determining an operation time of the switch unit; a reverse flow detecting unit detecting a reverse flow of a current flowing through the switch unit to generate a signal; and a switch control unit controlling the switch unit in response to signals of the topology selecting unit, the pulse width modulating unit and the reverse flow detecting unit. | 02-07-2013 |
20130076319 | CONTROL CIRCUIT EMPLOYING FOLLOWER CIRCUIT TO CONTROL REFERENCE SIGNAL AND RELATED CIRCUIT CONTROL METHOD - A control circuit includes: a first current generating circuit arranged for generating at least one output current according to a reference signal; a second current generating circuit arranged for generating a reference current corresponding to the reference signal according to the reference signal; and a follower circuit coupled to the second current generating circuit for generating a control current according to the reference current, and feeding back the control current to the first current generating circuit from the second current generating circuit in a signal-following manner to control the reference signal. | 03-28-2013 |
20130106372 | Transformer Voltage Regulation | 05-02-2013 |
20130113445 | POWER CONVERSION FEEDBACK CONTROL CIRCUIT - A power conversion circuit of two feedback loops is disclosed that includes a feedback control circuit for ramping up or down a commanded voltage to a load (e.g., LEDs). The second feedback loop feeds into the first feedback loop, and the second feedback loop operates at a slower bandwidth than the first feedback loop. When ramping up or down the commanded voltage, a voltage overshoot results because of delay in the system. The overshoot can be compensated for by a final adjustment to the commanded voltage. | 05-09-2013 |
20130119952 | Methods and Apparatus For Regulating Output Voltage of a Power Supply System - A power supply system includes a first connector, a second connector, a first circuit for detecting a magnitude of a current drawn from an energy source by the power supply system and providing a related output related, and a second circuit for adjusting an output voltage supplied to the second connector based on output of the first circuit. The output voltage supplied to the second connector is at a first value when the output of the first circuit is below a first threshold. Further, the output voltage supplied to the second connector is at a second value, greater than said first value, when the output of the first circuit is above a second threshold. The output voltage supplied to the second connector is at a third value, between said first and second values, when the output of the first circuit is between the first and second thresholds. | 05-16-2013 |
20130176006 | High Bandwidth PSRR Power Supply Regulator - A voltage regulator includes a power device formed by an NMOS transistor having a drain terminal coupled to an input voltage, a source terminal providing an output voltage and a gate terminal receiving a gate drive signal; and an integrated AC/DC control loop configured to access the output voltage and to generate the gate drive signal based on a value of the output voltage in relation to a first reference voltage and a second reference voltage. The AC control portion generates a gate drive control signal which is AC coupled to the gate terminal of the power device as an AC component of the gate drive signal. The DC control portion controls a DC voltage level of the gate drive signal. The AC control portion is powered by the input voltage while the DC control portion is powered by a high supply voltage greater than the input voltage. | 07-11-2013 |
20130181691 | OUTPUT CONTROL APPARATUS OF SOLAR CELL - An output control apparatus of a solar cell for controlling output of the solar cell is an output control apparatus of a solar cell for controlling output of the solar cell, the output control apparatus provided with: a first controlling device for sequentially increasing a load for extracting the output from a load in an increase area in which the output increases with respect to an increase in the load; a detecting device for detecting a decrease in the output with respect to the increase in the load in a process of sequentially increasing the load; and a second controlling device for rapidly reducing the load to an initial load which belongs to the increase area in comparison with the process of sequentially increasing the load in cases where a change in the output is detected, the first controlling device sequentially increasing the load again after the load is reduced to the initial load. | 07-18-2013 |
20130257396 | BANDGAP REFERENCE CIRCUIT FOR PROVIDING REFERENCE VOLTAGE - A bandgap reference circuit includes a first circuit, a second circuit and a third circuit. The first circuit is for generating a first current and a first voltage according to a first reference voltage. The second circuit is coupled to the first circuit, for generating a second voltage according to the first voltage. The third circuit is coupled to the first circuit and the second circuit, for generating a voltage offset according to the first current, and generating a bandgap reference voltage according to the second voltage and the voltage offset. The first circuit and the second circuit complement each other for offsetting variations of the bandgap reference voltage due to temperature changes. | 10-03-2013 |
20130257397 | Current Calibration Method and Associated Circuit - A current calibration method and the associated control circuit are provided. The method includes: providing a predetermined voltage to the differential output for obtaining an accurate current passing through the panel resistor during a calibration procedure and, providing a driving current to the differential output according to the accurate current during a normal operation procedure. | 10-03-2013 |
20140049234 | REGULATOR FOR CONTROLLING OUTPUT VOLTAGE - There is provided a regulator for controlling an output voltage, capable of stabilizing the voltage output from the regulator. The regulator for controlling an output voltage may include an output current generating unit generating an output current according to a reference voltage, an output voltage detecting unit detecting an output voltage using the output current, according to resistors provided therein, and a controlling unit comparing the output voltage with a preset reference output voltage to control the reference voltage. | 02-20-2014 |
20140117950 | VOLTAGE REGULATOR CIRCUIT - A voltage regulator circuit includes a differential amplifier stage. The gate terminal of a first n-channel MOSFET is coupled to an output of the differential amplifier stage. A resistor is coupled between the drain terminal and gate terminal of the first n-channel MOSFET. The drain terminal of the first n-channel MOSFET drives the gate of a second n-channel MOSFET whose drain terminal is at the input of a current mirror circuit. An output of the current mirror circuit forms the regulated voltage output. A feedback circuit is coupled between the regulated voltage output and one input of the voltage regulator circuit. Another input of the voltage regulator circuit is configured to receive a reference voltage. | 05-01-2014 |
20140145690 | INTERNAL VOLTAGE GENERATION CIRCUITS - An internal voltage generation circuit includes a reference voltage generator and an internal voltage generator. The reference voltage generator is configured to adjust resistance values according to test signals and to generate an upper limit reference voltage and a lower limit reference voltage whose levels are determined according to the resistance values. The internal voltage generator is configured to generate an internal voltage which is driven according to the levels of the upper and lower limit reference voltages. | 05-29-2014 |
20140266087 | START-UP CIRCUIT FOR VOLTAGE REGULATION CIRCUIT - Among other things, techniques and systems are provided to pre-charge a node of a primary circuit, such as a voltage regulator or bandgap voltage reference, via a start-up circuit. The node is charged to a specified voltage during a pre-charge operation that occurs while the primary-circuit is powered-off. The pre-charge operation comprises discharging a voltage from the node during a first portion of the pre-charge operation and re-charging the node to the specified voltage during a second portion of the pre-charge operation. In some embodiments, the specified voltage is substantially equivalent to a switching voltage of a drive transistor of the primary circuit. | 09-18-2014 |
20140306671 | HIGH PERFORMANCE CURRENT SOURCE POWER SUPPLY - A system can include a device under test (DUT) having a DUT voltage, a cable connected to the DUT, the cable having a cable inductance, and a power supply configured as a current source to provide a wide bandwidth voltage source to the DUT, wherein the DUT voltage is independent of the cable inductance. | 10-16-2014 |
20140327416 | HIGH BANDWIDTH PSRR POWER SUPPLY REGULATOR - A voltage regulator includes a power device formed by an NMOS transistor having a drain terminal coupled to an input voltage, a source terminal providing an output voltage and a gate terminal receiving a gate drive signal; and an integrated AC/DC control loop configured to access the output voltage and to generate the gate drive signal based on a value of the output voltage in relation to a first reference voltage and a second reference voltage. The AC control portion generates a gate drive control signal which is AC coupled to the gate terminal of the power device as an AC component of the gate drive signal. The DC control portion controls a DC voltage level of the gate drive signal. The AC control portion is powered by the input voltage while the DC control portion is powered by a high supply voltage greater than the input voltage. | 11-06-2014 |
20150077070 | FEEDFORWARD CANCELLATION OF POWER SUPPLY NOISE IN A VOLTAGE REGULATOR - A voltage regulator that provides feedforward cancellation of power supply noise is disclosed. The voltage regulator includes a process tracking circuit that receives a supply voltage and generates a proportional voltage. A tracking capacitor is coupled to the process tracking circuit and generates an injection voltage based on the proportional voltage. An Ahuja compensated regulator generates a regulated voltage. The injection voltage is provided on a feedback path of the Ahuja compensated regulator. | 03-19-2015 |
20150091537 | USE OF A THERMISTOR WITHIN A REFERENCE SIGNAL GENERATOR - Reference signal generators using thermistors are disclosed. An apparatus includes a first device having a first temperature coefficient and a thermistor having a second temperature coefficient having a sign opposite to that of the first temperature coefficient. A circuit maintains equivalence of a first signal and a second signal and offsets a first temperature variation of the first device using a second temperature variation of the thermistor to generate the second signal having a low temperature coefficient. The first device may be a bipolar transistor configured to generate a base-emitter voltage and coupled in series with the thermistor. The first signal may be a first voltage on a first node. The second signal may be a second voltage on a second node. The circuit may be configured to maintain effective equivalence of the first voltage and the second voltage. The apparatus may include a resistor coupled to the second node. | 04-02-2015 |
20150145487 | Method and Device for Generating an Adjustable Bandgap Reference Voltage - According to an embodiment, generating an adjustable bandgap reference voltage includes generating a current proportional to absolute temperature (PTAT). Generating the PTAT current includes equalizing voltages across the terminals of a core that is designed to be traversed by the PTAT current. Generating the adjustable bandgap reference also includes generating a current inversely proportional to absolute temperature (CTAT), summing the PTAT and the CTAT currents and generating the bandgap reference voltage based on the sum of the currents. Equalizing includes connecting-across the terminals of the core a first fed-back amplifier with at least one first stage arranged as a folded setup and including first PMOS transistors arranged according to a common-gate setup. Equalizing also includes biasing the first stage based on the CTAT current. The summation of the PTAT and CTAT currents is performed in the feedback stage of the first amplifier. | 05-28-2015 |
20160033981 | SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE AND METHOD OF REGULATING OUTPUT VOLTAGE THEREOF - Provided is a semiconductor integrated circuit device including a memory element to which a voltage and a current is input via a regulating input terminal to be able to change a threshold voltage thereof. The semiconductor integrated circuit device can change an output voltage depending on the threshold voltage. Also provided is a method of regulating an output voltage of the semiconductor integrated circuit device, including changing an input voltage to the regulating input terminal to change the output voltage, thereby setting an arbitrary output voltage. | 02-04-2016 |
20160061866 | REMOTE DIFFERENTIAL VOLTAGE SENSING - A remote differential voltage sensing circuit having a voltage input (Vin) and a voltage output (Vout), comprises a dual differential input stage including a common-source or common-collector differential input stage in parallel with a common-gate or common-base differential input stage. The common-source or collector differential input stage has differential inputs, one coupled to the voltage input (Vin) and the other coupled to the voltage output (Vout). The common-gate or common-base differential input stage has differential inputs, one coupled to a local ground (Agnd) and the other coupled to a remote ground (Rgnd). An output stage is driven by an output of the dual differential input stage and produces an output voltage at the voltage output (Vout). A compensation network is coupled between the voltage output (Vout) and the output of the dual differential input stage. | 03-03-2016 |
20160077533 | VOLTAGE REGULATION SYSTEM FOR INTEGRATED CIRCUIT - An integrated circuit (IC) includes a power grid having first, second, third, and fourth nodes for receiving first supply, first ground, second supply, and second ground voltage signals, respectively. A feedback circuit is connected to the second and fourth nodes for receiving the second supply and second ground voltage signals and generating a feedback voltage signal based on a difference between the second supply and second ground voltage signals. A resistor-ladder network receives the feedback signal and generates a sense voltage signal. A voltage regulator compares the sense voltage signal with a reference voltage signal and regulates the first supply voltage signal at a first voltage level. | 03-17-2016 |
20190146530 | LOW DROPOUT (LDO) VOLTAGE REGULATOR WITH SOFT-START CIRCUIT | 05-16-2019 |
20190146535 | SEMICONDUCTOR INTEGRATED CIRCUIT FOR REGULATOR | 05-16-2019 |
20220140734 | DC-DC CONVERTER REGULATION CIRCUIT AND METHOD FOR DETERMINING OVERSHOOT DURATION - An embodiment DC to DC conversion circuit comprises a DC to DC converter and a regulation circuit. The regulation circuit comprises a comparator configured to detect, during a discharge phase of the DC to DC converter, an overshoot period during which an output voltage of the DC to DC converter exceeds a target voltage, and a timer configured to measure a duration of the overshoot period. | 05-05-2022 |