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323 - Electricity: power supply or regulation systems


323265000 - Using a three or more terminal semiconductive device as the final control device

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Class / Patent application numberDescriptionNumber of patent applications / Date published
323280000 With a specific feedback amplifier (e.g., integrator, summer) 75
323275000 With plural condition sensing 47
323274000 With threshold detection 23
323281000 With reference voltage circuitry 23
20080303496Low Pass Filter Low Drop-out Voltage Regulator - A low dropout voltage regulator is described having a pass device, differential amplifiers, and a feedback loop including a low pass filter. Two differential amplifiers arranged in parallel coupled to the low pass filter in the feedback loop provide a specified and stable DC voltage whose input-to-output voltage difference is low. Improved stability, reduced die area, improved power supply rejection ratio, increased bandwidth, decreased power consumption, and better electrostatic discharge (ESD) protection may result.12-11-2008
20090121693Constant Voltage Circuit - A voltage change detecting circuit part amplifies an output signal of a differential amplifying circuit so that a slew rate thereof may be larger than that of a control signal output from a first error amplifying circuit to an output transistor, responding to change of an output voltage output from an output terminal quicker than a control signal output from the first error amplifying circuit to a first transistor, and causing a discharging circuit part to carry out discharging operation.05-14-2009
20100117609LOW DROPOUT (LDO) VOLTAGE REGULATOR AND METHOD THEREFOR - A low dropout voltage regulator includes an error amplifier, a voltage divider, and a voltage reference/amplifier circuit. The error amplifier has first and second input terminals, a power supply terminal for receiving an input voltage, and an output terminal for providing a regulated output voltage. The voltage divider provides a feedback voltage as a predetermined fraction of said regulated output voltage. The voltage reference/amplifier circuit provides a first voltage to said first input terminal of said error amplifier that varies inversely with variations of said feedback voltage, and provides a second voltage to said second input terminal of said error amplifier that varies by substantially the same amount over temperature as variations in said first voltage.05-13-2010
20100045247PARALLEL ARRANGED LINEAR AMPLIFIER AND DC-DC CONVERTER - A power supply system comprises a parallel arrangement of a linear amplifier (LA) and a DC-DC converter (CO). The linear amplifier (LA) has an amplifier output to supply a first current (II) to the load (LO). The DC-DC converter (CO) comprises: a converter output for supplying a second current (02-25-2010
20100109623CIRCUIT, INTEGRATED CIRCUIT AND METHOD FOR DISSIPATING HEAT FROM AN INDUCTIVE LOAD - A circuit comprises an inductive load. The circuit further comprises an energy-absorbing component operably coupled to the inductive load and arranged to absorb energy generated by the inductive load.05-06-2010
20130069608VOLTAGE REGULATOR STABILIZATION FOR OPERATION WITH A WIDE RANGE OF OUTPUT CAPACITANCES - A voltage regulator includes a measurement circuit for obtaining a value representing a magnitude of an output capacitance connected at an output node of the voltage regulator. A correction circuit in the voltage regulator modifies a compensation circuit internal to the voltage regulator based on the value. The modification of the compensation circuit is done to ensure that sufficient stability margins to accommodate the output capacitance are ensured for the main feedback loop in the voltage regulator. In an embodiment, a voltage proportional to the output capacitance is detected at start-up of the voltage regulator, and a corresponding binary signal is generated. The logic value of the binary signal is used to add or remove components and/or circuit portions in the compensation circuit to ensure stability. The voltage regulator is thus designed to support a wide range of output capacitance values.03-21-2013
20090091307POWER SUPPLY CIRCUIT AND METHOD FOR ADJUSTING OUTPUT VOLTAGE THEREIN - A power supply circuit and a method for adjusting an output voltage therein are provided. The power supply circuit includes a regulator having an input terminal receiving an input voltage, an output terminal outputting an output voltage and a regulating terminal, a voltage divider coupled between the output terminal and a ground, generating a dividing voltage, and a gain circuit coupled between the regulating terminal and the voltage divider, receiving the dividing voltage and generating a gain for adjusting the output voltage according to a reference voltage.04-09-2009
20090091305LINEAR REGULATOR - A regulator comprising a linear regulator. The linear regulator may comprise a preamplifier, a first radio frequency (RF) transistor and a second radio frequency (RF) transistor. An output of the preamplifier stage may be provided to a biasing terminal of the first RF transistor and a biasing terminal of the second RF transistor. Also, the first and second RF transistors may be electrically connected in series between a positive supply voltage and a negative supply voltage.04-09-2009
20090267579VOLTAGE REGULATOR - A voltage regulator with an adaptive bandwidth, including a first buffer chain, a voltage generating unit, a trimming capacitor unit, a second buffer chain, and a control unit. The first buffer chain delays a clock signal using an external voltage as a supply voltage. The voltage generating unit generates a regulated voltage on the basis a reference voltage. The trimming capacitor unit controls a load capacitance of the voltage generating unit. The second buffer chain delays the clock signal using the regulated voltage as a supply voltage. The control unit adjusts the load capacitance by detecting a delay difference of clocks output from the first and second buffer chains.10-29-2009
20090237046APPARATUS OF DYNAMIC FEEDBACK CONTROL CHARGE PUMP - An apparatus of dynamic feedback control charge pump is provided. The apparatus of dynamic feedback control charge pump receives an input voltage through a voltage regulator. The voltage regulator regulates the input voltage to a base voltage according to a control signal. The charge pump receives the base voltage and provides multiple of the base voltage to an output voltage. A feedback unit provides the control signal to the voltage regulator according to the output voltage. Therefore, the apparatus of dynamic feedback control charge pump can reduce the output voltage ripple and improve the output efficiency of the charge pump.09-24-2009
20090189577Linear regulator and voltage regulation method - The present invention discloses a linear regulator and a voltage regulation method. The method comprises: providing a power transistor for converting a supply voltage to an output voltage to a load according to the conduction condition of the power transistor; controlling the conduction condition of the power transistor according to a comparison between a feedback signal relating to the output voltage and a reference voltage; obtaining a signal relating to a load condition; and controlling the conduction capability of the power transistor according to the signal relating to the load condition.07-30-2009
20100156362Load transient response time of LDOs with NMOS outputs with a voltage controlled current source - A voltage controlled current source circuit is utilized to clamp the internal compensation node of a low dropout (LDO) regulator with an NMOS output during load transients. The circuit senses a voltage drop of the internal node and mirrors its current to the internal node to hold the internal node voltage when the voltage starts to drop low enough to turn off the output transistor.06-24-2010
20100327828MOSFET CURRENT LIMITING CIRCUIT, LINEAR VOLTAGE REGULATOR AND VOLTAGE CONVERTING CIRCUIT - A MOSFET current limiting circuit, a linear voltage regulator, and a voltage converting circuit are provided. A current limiting value of the MOSFET is adjusted with the temperature or the voltage drop across the drain and the source of the MOSFET. Accordingly, it is ensured that the MOSFET operates in the safe operating area in any situation. Therefore, the MOSFET is prevented from being burnt out, and the reliability thereof is also increased.12-30-2010
20090045788High Voltage SEPIC Converter - A SEPIC converter with over-voltage protection includes a high-side inductor that connects a node V02-19-2009
20090091306Semiconductor Integrated Circuit Device and Regulator Using It - A semiconductor integrated circuit device (IC04-09-2009
20120187930VOLTAGE REGULATOR HAVING CURRENT AND VOLTAGE FOLDBACK BASED UPON LOAD IMPEDANCE - The regulated output voltage of a voltage regulator is maintained up to a current limit, I07-26-2012
20080303497Semiconductor integrated circuit device for providing series regulator - A semiconductor integrated circuit device for controlling an external output transistor is provided. The semiconductor integrated circuit device comprises: a first power supply circuit including an output circuit and providing a first series regulator in cooperation with the output external transistor; and a plurality of terminals. The plurality of terminals includes a control signal output terminal and high and low electric potential side power supply terminals for supplying electric power to the first power supply circuit. At least one of the high and low electric potential side power supply terminals is arranged adjacent to the control signal output terminal and defined as a first terminal. Short-circuiting between the control signal output terminal and the first terminal causes the external output transistor to switch into an off state.12-11-2008
20110062921VOLTAGE REGULATOR - Provided is a voltage regulator capable of securely preventing a reverse current from an output terminal (03-17-2011
20090206806VOLTAGE COMPARISON CIRCUIT, AND SEMICONDUCTOR INTEGRATED CIRCUIT AND ELECTRONIC DEVICE HAVING THE SAME - A disclosed voltage comparison circuit for detecting a voltage difference of two input signals includes one or more differential amplifier circuits, each of which has a differential pair of first and second input transistors each having an electrode to which a corresponding one of the input signals is input, a constant current circuit configured to generate constant current according to a control signal and supply the constant current to the first and second input transistors, and a first resistor connected between the constant current circuit and the first input transistor; and a current control circuit configured to control a value of the first constant current. The current control circuit controls the value so that a voltage difference between both ends of the first resistor becomes equal to a predetermined value.08-20-2009
20090224735FILTER CIRCUIT AND METHOD OF CONTROLLING SAME - Disclosed is a filter circuit that includes means for monitoring currents flowing through positive and negative windings of a common-mode noise filter, and means for performing an adjustment based on the result of monitoring so as to equalize the current flowing positive and negative windings.09-10-2009
20080211469STEP-DOWN CIRCUIT - A step-down circuit generates a second power supply lower than a first power supply. The step-down circuit includes an output terminal connected to a load circuit, an output transistor connected between the first power supply and the output terminal, and having a gate terminal connected to a first node, a monitor transistor connected between the first power supply and a second node, and having a gate terminal connected to the first node, and a feedback circuit which sets a gate voltage of the output transistor in accordance with a difference between a voltage obtained by dividing a voltage of the second node and a reference voltage. A size of the monitor transistor is changed in accordance with an operation mode of the load circuit.09-04-2008
20100052633MODIFIED CURRENT SOURCE (MCS) WITH SEAMLESS RANGE SWITCHING - A current source is provided with two resistor banks, and digital potentiometers are used to control how much each resistor bank affects the resulting output current. Furthermore, when the digital potentiometers are at a particular setting such that a particular resistor bank does not affect the resulting output current (i.e., the resistor bank is “inactive”), the resistance of that resistor bank can be switched without affecting the output current, thus minimizing or eliminating discontinuities in the output current during a current sweep operation. Thus, for example, when a resistor bank meets its threshold and becomes inactive, the resistance of the inactive resistor bank may be switched, and then the digital potentiometer setting may be changed to facilitate smoothly reactivating that resistor bank, with the new resistance.03-04-2010
20090045789POWER SUPPLY CIRCUIT - A power supply circuit includes a standard voltage generator; a regulator to control an output voltage, and to be capable of being switched ON/OFF; a capacitor in parallel between the standard voltage generator and the regulator; a discharging circuit including a first switch and a second switch configured to discharge electrical charges from the capacitor via the second switch while the regulator is in an OFF state; and a starting controller configured to transmit a signal for controlling the first switch and the second switch. The first switch is connected in series between the standard voltage generator and the regulator. The second switch has one end connected to a connection node between the first switch and the regulator, and has another end connected to a ground. When the first switch is in OFF state, the second switch is turned to ON state while the regulator is in OFF state.02-19-2009
20090128104FULLY INTEGRATED ON-CHIP LOW DROPOUT VOLTAGE REGULATOR - A low dropout voltage regulator (LDO) includes a bias voltage generator, a differential error amplifier, an output driver, a controlled active load, a Double Ended Cascode Miller compensation block. The bias voltage generator produces a plurality of bias voltages. The differential error amplifier produces a differential output voltage based on the difference between a reference voltage and a function of the output voltage. The input terminal of the output driver is coupled to one output of the differential error amplifier. The substrate terminal of the output driver is capacitively coupled to the output node and resistively coupled to the input supply node. The controlled active load is coupled to the output of the output driver, and its control terminal is coupled to a function of the second output of the differential error amplifier. The inputs of the Double Ended Cascode Miller compensation block are capacitively coupled to the output node and its output is coupled to the input terminal of the output driver.05-21-2009
20090001950FLASH MEMORY AND RELATED VOLTAGE REGULATOR - A voltage regulator includes a voltage regulator unit configured to output a step voltage and a damping resistance switching unit coupled between a load and an output node of the voltage regulator and configured to select an optimal damping resistance value based on a required load capacity.01-01-2009
20090085537Power supply apparatus - A first booster circuit and a second booster circuit include input capacitors, reactors, diodes, switch elements, and output capacitors, and are arranged to be symmetric to each other on a positive side and a negative side. The reactors are magnetically coupled to each other. With such configuration, the switch elements are on/off controlled simultaneously based on terminal voltages of the input capacitors and the output capacitors.04-02-2009
20090085538Power Supply Device, Electronic Device, and A/D Converter Used for Them - In the power supply apparatus which performs voltage conversion of an input voltage (Vbat), with a predetermined set voltage as a target value, and outputs the converted voltage, a boost ratio setting unit sets a boost ratio (XCP) of the charge pump circuit based on the input voltage (Vbat) and a predetermined set voltage. A voltage adjustment unit is a regulator circuit, and adjusts voltage (Vx) so that output voltage (Vout) of the charge pump circuit approaches the set voltage. An output voltage setting unit generates a predetermined set voltage as a digital value (Dset). An A/D converter performs analog-digital conversion of the input voltage (Vbat). The boost ratio setting unit sets the boost ratio based on a result of comparing an input voltage (Ddet) that has undergone analog-digital conversion, and the set voltage (Dset).04-02-2009
20090096434NMOSFET-base linear charger - In an NMOSFET-base linear charger, a pair of common gate charging NMOSFET and sensing NMOSFET have their sources coupled together or virtually shorted to each other, so that these two NMOSFETs have a same gate-source voltage and thereby the sensing NMOSFET reflects the drain-source current of the charging NMOSFET on its drain-source current. From the drain-source current of the sensing NMOSFET, a current sensing signal is generated to control the gate voltage of the charging NMOSFET. By implementing the current source with NMOSFETs, the linear charger has smaller die area and less power loss.04-16-2009
20090243567VOLTAGE CONTROL CIRCUIT - Provided is a voltage control circuit which suppresses a calorific value that generates when short-circuit fault occurs even if a voltage value of an input voltage is large. At the time of short-circuit fault, an additional control voltage Va whose voltage value becomes larger when the voltage value of the input voltage Vin is larger is input to the voltage control p-channel MOS transistor (10-01-2009
20090315524Constant current control circuit - A constant current control circuit is disclosed. Pads are connected with a common power supply terminal. Shunt resistors are located outward of a region containing Pch type MOS transistors. A temperature increase of the shunt resistors due to a temperature increase of the MOS transistors can be suppressed by the above structure. In particular, when the MOS transistor of one circuit system is driven, the shunt resistor of another circuit system is distant from the driving MOS transistor, and thus, it is possible to further suppress the temperature increase of the distant shunt resistor. Moreover, a power supply terminal can be provided as a single common terminal, and the number of terminals can be reduced.12-24-2009
20090045787Semiconductor Device and Power Supply Device - At the time of voltage adjustment, a selector (02-19-2009
20100237839HYBRID LOW DROPOUT VOLTAGE REGULATOR CIRCUIT - A voltage regulator circuit includes a digital control block, an amplifier and a transistor. The digital control block receives a first reference voltage and a feedback voltage, converts the received voltages from analog to digital signals, performs an integration operation on the converted signals, and converts the result of the integration operation to an analog signal. The amplifier is responsive to the output of the digital control block and to a regulated output voltage of the regulator circuit. The transistor has a first terminal responsive to the output of the amplifier, a second terminal that receives the input voltage being regulated, and a third terminal that supplies the regulated output voltage. The transistor may be an NMOS or a bipolar NPN transistor. The feedback voltage may be generated by dividing the regulated output voltage. The digital control block optionally generates a biasing signal to bias the amplifier.09-23-2010
20100127674POWER SUPPLY DEVICE OF CONTROLLING FEEDBACK SYNCHRONIZATION - A power supply device of controlling feedback synchronization is connected to an electric power source for obtaining an input power and includes first and second converters for modulating the input power. The first and second converters include first and second output terminals for providing first and second output power respectively. The power supply device further includes a feedback synchronization unit electrically coupled to the first and second output terminals of the first and second converters for obtaining first and second feedback signals, and producing and transmitting a synchronous feedback signal to the second converter according to a voltage difference of the first and second feedback signals to synchronizing output voltage level of the second converter with the first converter. The aforementioned circuit can control the synchronization of a voltage boost time and output time of the first and second converters.05-27-2010
20090039845METHOD AND APPARATUS FOR POWER MANAGEMENT OF A LOW DROPOUT REGULATOR - A method of switching a low dropout regulator includes determining an actual active time of a power request from an electronic device; enabling the low dropout regulator in response to said power request at a time corresponding to a start of the actual active time of the power request for an active enabled time having a duration at least the same as the actual active time and long enough to sufficiently settle the output voltage of the low dropout regulator; and disabling the low dropout regulator. In embodiments, the active enabled time is prolonged beyond the actual active time of the power request for all or at least some power requests. An electronic device includes circuits for controlling the switching of a low dropout in the described manner.02-12-2009
20090039844POWER SUPPLY UNIT AND PORTABLE DEVICE - A power supply unit, adapted to provide a predetermined output voltage from its output circuit, compares a feedback voltage associated with the output voltage of the output circuit with a reference voltage so as to control the output circuit. The power supply unit is enabled and disabled in response to an externally supplied operation command signal. The reference voltage is generated by a reference voltage generation circuit, which is operable on the voltage of the operation command signal, and is controllably enabled when the voltage of the operation command signal exceeds a predetermined level, but otherwise disabled. Thus, the reference voltage is stabilized to improve the ripple rejection characteristic of the power supply unit without increasing its current consumption.02-12-2009
20090072801VOLTAGE GENERATING CIRCUIT - A voltage generating circuit according to the present invention comprises a voltage converter which voltage-converts a reference voltage, and an output unit which impedance-converts the voltage outputted from the voltage converter. The voltage converter and the output unit each comprise a low-voltage-side power supply and a high-voltage-side power supply. A voltage level of the high-voltage-side power supply in the output unit is set to be higher than a voltage level of the high-voltage-side power supply in the voltage converter.03-19-2009
20090115382LINEAR REGULATOR CIRCUIT, LINEAR REGULATION METHOD AND SEMICONDUCTOR DEVICE - According to one aspect of the embodiment, a linear regulator circuit includes an output transistor outputting an output current based on a input voltage, an error amplifier outputting a control signal based on an electric potential difference between an output voltage based on the output current and a reference voltage, a buffer circuit coupled between the error amplifier and the output transistor, and a drive capability adjustment circuit adjusting a load drive capability of the buffer circuit in synchronization with the output current.05-07-2009
20130134951Adaptive Analog Compensator for a Power Supply - The present application is directed at methods of controlling power supplies. In particular the present application employs an analog compensator to control the power stage of the power supply with a digital tuner employed to adaptively tune the operation of the analog compensator.05-30-2013
20110115452OUTPUT DRIVER CIRCUITS FOR VOLTAGE REGULATORS - An output driver circuit having an input stage and an output stage, wherein the output stage and the input stage are configured to function as (1) a low-frequency voltage follower and (2) a high-frequency feedback loop for the output driver circuit. In operation, the low-frequency follower and the high-frequency feedback loop may precisely regulate the output voltage of the output driver circuit when large load transients occur. A compact charge pump may be used to supply additional voltage required to operate a current mirror of the output driver circuit.05-19-2011
20090218997POWER SUPPLY CIRCUIT - In one embodiment, a current limiter is configured to limit current drawn from a main power supply to a maximum value. A load device is coupled with an output of the current limiter. The load device is configured to periodically draw a first current during operation. The maximum value is below a value of the first current. A charge storage device is coupled with the load device. The charge storage device is configured to supply additional current to the load device to satisfy the first current value. A linear voltage regulator is coupled between the charge storage device and the load device.09-03-2009
20120242306DRIVING CIRCUIT - A driving circuit includes a switching circuit, an acquiring circuit, an amplifying circuit, and an adjusting circuit. The switching circuit includes a driving chip and a switching unit. The switching unit is connected between a power source and a load, the driving chip is configured for controlling the connection and disconnection of the switching unit. The acquiring circuit is connected between the switching unit and the load, and is configured for providing a feedback to the amplifying circuit. The amplifying circuit includes two amplifying input terminals connected to two terminals of the acquiring circuit and an amplifying output terminal outputting an amplified voltage. The adjusting circuit is connected to the amplifying output terminal and is configured for outputting different control voltages to the driving chip according to the amplified voltage. The driving chip outputs different driving voltages to the switching unit according to the control voltages.09-27-2012
20120242307POWER SUPPLY CIRCUIT - A power supply circuit includes: an N-type FET outputting electricity of an external power supply to a load; a drive line supplying the electricity from the external power supply to the FET; an output line outputting the electricity from the FET to the load; a charge device charging the electricity according to a potential difference between the drive line and the output line; a drive device in the drive line and applying a voltage to a gate of the FET higher than a source of FET so that the FET switches to be the on-state; a step-down device connected to the output line and reducing a voltage across the output line when the FET is in the off-state; and a current regulation device in the output line and regulating a flow of current from the load toward the step-down device.09-27-2012
20100066320Integrated LDO with Variable Resistive Load - To provide adequate compensation for a wide range of output loads, a low dropout (LDO) regulator has an amplifier, a pass transistor, a voltage divider, a compensation network, and a control circuit. The amplifier outputs a comparison result according to a reference signal and a feedback signal. The pass transistor generates an output current based on the comparison result of the amplifier. The voltage divider generates the feedback signal according to the output current. The compensation network couples the output of the pass transistor to a low-impedance node of the amplifier, and has a compensation capacitor and a variable resistor coupled to the compensation capacitor. The control circuit is coupled to the input of the pass transistor and to the variable resistor for controlling resistance of the variable resistor according to the output current of the pass transistor.03-18-2010
20080231242Multi-Mode Voltage Supply Circuit - A supply voltage is provided in an integrated circuit by retrieving an indicator from a storage device and generating a supply voltage for use by the integrated circuit, the supply voltage being regulated responsive to the indicator being in a first state and unregulated responsive to the indicator being in a second state. Alternatively or additionally, an external voltage provided to the integrated circuit is compared with a threshold. The supply voltage is regulated responsive to the external voltage exceeding the threshold level and unregulated responsive to the external voltage falling below the threshold level.09-25-2008
20120146601VOLTAGE DIVIDER CIRCUIT AND VOLTAGE REGULATOR - The invention provides a voltage regulator including a voltage divider and a power supply. The voltage divider circuit includes a first, second, third PMOS transistors, a first NMOS transistor, a pull down circuit, and a switching capacitor circuit. The pull down circuit includes a plurality of switches controlled by a pull down control signal. The switching capacitor circuit controlled by a first control pulse includes a capacitor and provides the capacitor connected to the dividing voltage for a short period while the power supply starts up to provide the input voltage. The power supply includes a comparator and a power voltage switch. The comparator compares the dividing voltage and a reference voltage and outputs a comparison result correspondingly. The power voltage switch is controlled by the comparison result to provide the input voltage from a power voltage.06-14-2012
20100213907Low Drop Out Linear Regulator - A low drop out linear regulator is provided. The low drop out linear regulator comprises an output PMOS, a load, a discharging circuit and an operational amplifier. The output PMOS comprises a source connected to a power supply and a drain having an output voltage and an output current. The drain is connected to a load circuit having a heavy and a light load period. The load is connected to the drain to generate a divided output voltage. The discharging circuit is connected to the drain to discharge the output current from the drain. The operational amplifier is to generate a control voltage according to the divided output voltage and a reference voltage; when the load circuit switches from the heavy to the light load period to make the divided output voltage higher than the reference voltage, the control voltage turns off the output PMOS and activates the discharging circuit.08-26-2010
20080218137TECHNIQUE FOR IMPROVING EFFICIENCY OF A LINEAR VOLTAGE REGULATOR - A linear voltage regulator includes a first transistor, a feedback circuit, and a control circuit. The first transistor includes a first terminal coupled to an input terminal of the regulator, a second terminal coupled to an output terminal of the regulator, and a control terminal. The first transistor is configured to provide a load current to the output terminal at a desired voltage level based on a control signal on the control terminal. The feedback circuit is coupled to the output terminal and is configured to generate a feedback signal based on an actual voltage level at the output terminal. The control circuit is configured to provide, based on the feedback signal, the control signal at a level to substantially maintain an output voltage at the output terminal at the desired voltage level. An operating current of the control circuit is configured to increase, by a limited amount, responsive to a transient increase in the load current.09-11-2008
20100194360METHOD AND SYSTEM OF REGULATING VOLTAGES - Regulating voltages. At least some of the illustrative embodiments are systems including a switching circuit configured to produce an intermediate voltage signal from an input voltage signal, and a first voltage regulator coupled the switching circuit and configured to produce a first regulated voltage signal from the intermediate voltage signal. The switching circuit is configured to create the intermediate voltage signal based on a switching signal having a duty cycle, and wherein the duty cycle of the switching signal is open-loop with respect the intermediate voltage signal and the first regulated voltage signal.08-05-2010
20100026251VOLTAGE REGULATOR WITH RIPPLE COMPENSATION - Embodiments of the present invention provide a voltage regulator. The voltage regulator includes a driving mechanism coupled to an output node (VREG), wherein the driving mechanism is configured to provide current to the output node to sustain a predetermined voltage on the output node. In addition, the voltage regulator includes a boost circuit coupled to the output node, wherein the boost circuit is configured to drive an additional current onto the output node to reduce fluctuations in the output node voltage when a load coupled to the output node requires a transient switching current that is faster than the loop response time of the driving mechanism. Furthermore, the boost circuit is biased using a self-tracking mechanism to provide accurate duration and level of the current to the output node in a transient switching event.02-04-2010
20110316504Power Supply Noise Injection - A method for reducing noise in an output of a voltage regulator at frequencies above a closed loop bandwidth, by providing a noise injection path for injecting external noise into the voltage regulator, where the noise injection path becomes active at the frequencies above the closed loop bandwidth, where the noise injection path reduces the noise in the output of the voltage regulator.12-29-2011
20080231243LOAD INDEPENDENT VOLTAGE REGULATOR - An integrated circuit package (09-25-2008
20110156670PASSIVE BOOTSTRAPPED CHARGE PUMP FOR NMOS POWER DEVICE BASED REGULATORS - A charge pump in a low dropout (LDO) regulator includes a first capacitor coupled to an output of an amplifier and to a gate of a pass transistor. A first plurality of switches is operable to couple a second capacitor between an output of the LDO regulator and to a ground in a first clock phase, such that the second capacitor charges to an output voltage. A second plurality of switches is operable to couple the second capacitor in parallel to the first capacitor in a second clock phase such that the second capacitor charges the first capacitor.06-30-2011
20120001604VOLTAGE REGULATION CIRCUIT - A voltage regulation circuit includes: a first voltage divider that divides a regulation voltage with a predetermined division ratio to generate a division voltage; a first current driving force control unit configured to compare a reference voltage with the division voltage and generate a first control signal; a current driving unit configured to generate a driving current with a variable driving force based on the first control signal and a second control signal, and generate the regulation voltage; and a second current driving force control unit configured to generate the second control signal in accordance with a level variation of the regulation voltage.01-05-2012
20120161731VOLTAGE REGULATOR AND ASSOCIATED APPARATUS AND METHODS - In one or more embodiments described herein, there is provided an apparatus comprising an input, an output, one or more voltage regulator circuit components, and one or more graphene capacitors. The voltage regulator circuit components are configured to provide for a change in the voltage level of signalling between the input and the output. The one or more graphene capacitors are configured to provide for smoothing of the signalling provided to the output.06-28-2012
20110121800Method for providing and operating an LDO - The LDO has at least three stages supplied by a supply voltage. A first stage has a differential amplifier and a folded cascode device with a regulated current mirror. The LDO has two nodes that are configured to couple the differential amplifier and the regulated current mirror and to receive a differential signal, respectively. The regulated current mirror is configured to convert and amplify the differential signals to a single ended signal. Said LDO has a first capacitor configured for frequency compensation, said first capacitor coupled between said first stage and a second stage. The LDO has a second capacitor for balancing capacitive loading of a first cascode circuit, said second capacitor coupled between said first stage and said supply voltage. Said first cascode circuit is configured to suppress different voltages between input and output of the capacitors caused of a modulation of said supply voltage. The LDO has a second cascode circuit configured to suppress supply modulations of the differential amplifier.05-26-2011
20090174378Hybrid Filter for High Slew Rate Output Current Application - An active linear regulator circuit in parallel with a filter capacitor of a switching voltage regulator injects current to a load only when the switching regulator and capacitor cannot supply adequate current to follow high frequency load transients in a manner which is compatible with adaptive voltage positioning (AVP) requirements. control of current injection and determination of the insufficiency of current from the switching regulator and capacitors is achieved by impedance matching of the linear regulator to the switching regulator. The linear regulator thus operates at relatively low current and duty cycle to limit power dissipation therein. By matching impedances and increasing the bandwidth of the switching regulator, filter capacitor requirements can be reduced to the point of being met entirely by packaging and/or on-die capacitors which may be placed close to or at the point of load to reduce parasitic inductance, as can the linear regulator.07-09-2009
20120319665FAST RESPONSE CURRENT SOURCE - A fast response current source capable of providing an output current is disclosed. The fast response current source includes a constant current generating block, a first feedback capacitor, a first current buffer and a first output current generating block. The constant current generating block provides a first constant current. The first current buffer generates a first buffering current to flow through the first feedback terminal, and changes a current value of the first buffering current in response to the current variation at the first feedback terminal when the voltage at the output terminal is varied. The first output current generating block generates a first output current to flow through the output terminal, and changes a current value of the first output current in response to the variation of the first buffering current when the voltage at the output terminal is varied.12-20-2012
20120081086POWER SUPPLY CIRCUIT AND A METHOD FOR OPERATING A POWER SUPPLY CIRCUIT - A power supply circuit and a method for operating a power supply circuit involves selecting a normal operational mode or a pass-through operational mode for a switched mode power supply, in the normal operational mode, converting an input voltage of a power supply circuit to an intermediate voltage using a switching regulator of the switched mode power supply, in the pass-through operational mode, disabling the switching regulator such that the input voltage of the power supply circuit is unchanged by the switching regulator and an electric current consumption of the switching regulator approaches zero, and converting the intermediate voltage or the input voltage of the power supply circuit to an output voltage using a linear voltage regulator.04-05-2012
20120280667Flexible load current dependent feedback compensation for linear regulators utilizing ultra-low bypass capacitances - The present document relates to low-dropout (LDO) regulators having low output capacitance. The regulator comprises a differential amplification stage configured to amplify a differential voltage between a reference voltage and a measure of the output voltage, thereby yielding a drive current at an output of the amplification stage; a subsequent output amplification stage configured to provide the regulated output voltage and a output current at an output of the output amplification stage, based on a drive voltage at an input of the output amplification stage; and a first output current feedback loop configured to sense the output current; and feed back a first coupling current derived from the sensed output current to a first intermediate point between the output of the differential amplification stage and the input of the output amplification stage; wherein the drive voltage is dependent on the drive current and the first coupling current.11-08-2012
20130009620SYSTEM INCLUDING AN OFFSET VOLTAGE ADJUSTED TO COMPENSATE FOR VARIATIONS IN A TRANSISTOR - A system including a first transistor, a first capacitor and a circuit. The first transistor has a first control input and is configured to regulate an output voltage. The first capacitor is coupled at one end to the first control input and at another end to a circuit reference. The circuit is configured to provide a first voltage to the first control input, where the first voltage includes an offset voltage that is referenced to the output voltage and adjusted to compensate for variations in the first transistor.01-10-2013
20130176007LOW-DROPOUT REGULATOR OVERSHOOT CONTROL - Representative implementations of devices and techniques control regulator output overshoot. An offset signal is provided to a component of the regulator during at least a portion of the regulator start-up.07-11-2013
20130093404APPARATUS AND METHOD FOR PROTECTING SUPPLY MODULATOR - An apparatus and a method for recognizing an electric over-stress of a hybrid supply modulator including a linear regulator and an Switching Mode Power Supplier (SMPS), and protecting a network from the electric over-stress are provided. The hybrid supply modulator includes at least one sensing unit and at least one actuator unit. The at least one sensing unit senses at least one of a current and a voltage at one or more points defined in advance within a supply modulator network. The at least one actuator unit performs a protection action corresponding to at least one electric over-stress situation represented by the sensing result.04-18-2013
20130099764SYSTEM AND METHOD TO REGULATE VOLTAGE - A system and method to regulate voltage is disclosed. In a particular embodiment, a voltage regulator includes an error amplifier, a voltage buffer responsive to the error amplifier, and a first transistor responsive to the voltage buffer and coupled to a voltage supply source. A second transistor is coupled to the voltage supply source and further coupled to an output node. A third transistor is coupled to the first transistor and has a gate coupled to a capacitor. The capacitor is coupled to a node between the error amplifier and the voltage buffer.04-25-2013
20130141065Circuit for Regulating and Monitoring a Signal Current and Measurement Transducer with such a Circuit - A circuit for regulating and monitoring a signal current, comprising a regulating circuit; and a monitoring circuit. The regulating circuit comprises: a first controlled voltage source for outputting a target value dependent controlled voltage; a current adjust circuit for adjusting the signal current in dependence on the controlled voltage and a first feedback voltage by means of a potentiometer; and a first feedback path, with at least one first resistance element across which the signal current flows. The voltage drop across the resistance element or one of the voltages of the current adjust circuit dependent thereon is supplied as a first feedback voltage. The monitoring circuit comprises: a second controlled voltage source for outputting a second target value dependent controlled voltage; an analog monitoring circuit for determining the deviation between the second controlled voltage and a second feedback voltage; and a second feedback path with a resistance element across which the signal current flows, wherein the voltage drop across the resistance element or a voltage of the monitoring circuit dependent thereon is supplied as a second feedback voltage.06-06-2013
20080211470Auto discharge linear regulator and method for the same - The present invention discloses an auto discharge linear regulator comprising: a basic linear regulator for converting an input voltage to an output voltage at an output node; a load detector circuit for detecting the load condition at the output node; and an discharge control circuit under control by the load detector circuit for discharging the voltage at the output node.09-04-2008
20130147447High-Speed LDO Driver Circuit using Adaptive Impedance Control - The present document relates to linear regulators or linear voltage regulators configured to provide a constant output voltage. In particular, the present document relates to driver circuits of low-dropout (LDO) regulators. A driver circuit (06-13-2013
20130147446INTEGRATED CIRCUIT DEVICE WITH TWO VOLTAGE REGULATORS - An integrated circuit device has a digital device operating at an internal core voltage; a linear voltage regulator; and an internal switched mode voltage regulator controlled by the digital device and receiving an external supply voltage being higher than the internal core voltage through at least first and second external pins and generating the internal core voltage, wherein the internal switched mode voltage regulator is coupled with at least one external component through at least one further external pin of the plurality of external pins.06-13-2013
20130176008Soft Start Circuit and Power Supply Device Using the Same - The present invention discloses a soft start circuit for a power supply device comprising an external P-type transistor for charging an output capacitor to provide an output voltage. The soft start circuit includes a current source, for providing a discharge current; and a disabling means, coupled to the current source, for discharging an equivalent total parasitic capacitor of the external P-type transistor during an activation period according to the discharge current.07-11-2013
20100308781Quick-Start Low Dropout Regulator - A low dropout regulator includes an error amplifier, an N-type depletion MOSFET, a first switch, a second switch, a low-pass filter resistor, and a low-pass filter capacitor. By switching on both the first switch and the second switch, a voltage level of an output node at a negative input terminal of the error amplifier may be rapidly raised to be close to and lower than a voltage level of an input node at a gate of the N-type depletion MOSFET. Both the first switch and the second switch are then switched off immediately so that the voltage level of the output node is gradually raised to be equal to the voltage level of the input node through the low-pass filter resistor.12-09-2010
20130154592CIRCUIT AND METHOD FOR PROVIDING A REFERENCE SIGNAL - An integrated circuit for providing a reference signal to a regulator includes a comparison circuit and a first reference signal adjustor. The comparison circuit is configured to output a control signal based on a difference between levels of a constraint signal of the regulator, such as an input voltage signal or a supply voltage signal, and the reference signal. The regulator has a feedback control loop maintained by the reference signal. The first reference signal adjustor is operatively coupled to the comparison circuit and is configured to adjust the level of the reference signal based on the control signal such that the level of the reference signal increases toward a preset level and does not cause the feedback control loop of the regulator to become saturated when the regulator is in a start-up phase.06-20-2013
20130154593ADAPTIVE PHASE-LEAD COMPENSATION WITH MILLER EFFECT - An adaptive phase-lead compensation (zero) circuit is disclosed that can be added to a circuit (e.g., a CMOS-based LDO) to ease the compensation and increase the phase margin of the circuit. By using the disclosed adaptive phase-lead compensation circuit, an adjustable resistance can be connected to any nodes in the compensated circuit rather than just to the voltage source (VDD) or ground (GND), allowing the Miller Effect to be used via a Miller capacitor.06-20-2013

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