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| Number | Title | Issue Date |
| 8179108 | Regulator having phase compensation circuit A regulator circuit includes an output transistor that generates an output current in accordance with a control voltage that is applied to a control terminal of the output transistor. A differential amplifier provides feedback control of the control voltage in accor... | 05/15/2012 |
| 8154265 | Enhanced efficiency low-dropout linear regulator and corresponding method A low-dropout linear regulator includes an error amplifier which includes a cascaded arrangement of a differential amplifier and a gain stage. The gain stage includes a transistor driven by the differential amplifier to produce at a drive signal for an output stage ... | 04/10/2012 |
| 8129968 | Integrated circuit for system calibration The present invention discloses an integrated circuit for system calibration, applicable to a power supply, comprising: a comparison module, having a feedback input end coupled to a feedback signal and a reference input end coupled to an analog reference signal for ... | 03/06/2012 |
| 8129966 | Voltage regulator circuit and control method therefor A voltage regulator circuit and control method therefor. The circuit includes input and output terminals, an output transistor to pass a current from the input terminal to the output terminal according to a control signal, a reference voltage generator unit to gener... | 03/06/2012 |
| 8129967 | Voltage regulator with self-adaptive loop A voltage regulator includes an amplifier and a regulation loop. The regulator includes a first PMOS transistor connected to a terminal supplying an input voltage, a second PMOS transistor connected in series with the first PMOS transistor. A node between those two ... | 03/06/2012 |
| 8115463 | Compensation of LDO regulator using parallel signal path with fractional frequency response A low drop out (LDO) voltage regulator (10) includes a pass transistor (MPpass) having a source coupled by an output conductor (4) to a load and a drain coupled to an input voltage to be regulated. An error amplifier (2) has a first i... | 02/14/2012 |
| 8102163 | Voltage regulator Provided is a voltage regulator which can achieve high-speed response and is not susceptible to a ripple. An amplifier (19) and an amplifier (23) provide push-pull output to an output transistor (14). Therefore, even when an idling current is sm... | 01/24/2012 |
| 8085018 | Voltage regulator with phase compensation Provided is a voltage regulator capable of performing appropriate phase compensation. Even when a difference between an input voltage and an output voltage is small, an appropriate phase compensation voltage based on an output voltage (Vout) is generated in a resist... | 12/27/2011 |
| 8080984 | Replica transistor voltage regulator A voltage regulator is provided having high accuracy, low PSRR, and no headroom limitation. Generally, the regulator includes: an operational amplifier (OPAMP) having a non-inverting input coupled to a reference voltage; an output source follower coupled to and cont... | 12/20/2011 |
| 8054055 | Fully 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. T... | 11/08/2011 |
| 8044647 | Voltage down converter A voltage down converter includes a voltage comparator for comparing a first reference voltage and an internal voltage to provide a first driving signal; a driving signal controller coupled with the voltage comparator, the driving signal controller configured to gen... | 10/25/2011 |
| 7994764 | Low dropout voltage regulator with high power supply rejection ratio 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 pr... | 08/09/2011 |
| 7973522 | DC/DC converter, and power amplifier applying the same A DC/DC converter capable of controlling an output signal using a broadband signal input is provided. By employing the above DC/DC converter as a power supply, a highly efficient power amplifier can be configured. The above DC/DC converter includes two class-C ampli... | 07/05/2011 |
| 7965067 | Dynamic compensation for a pre-regulated charge pump An apparatus is provided. The apparatus comprises an error amplifier that amplifies the difference between a reference voltage and a feedback voltage, a first variable impedance circuit coupled to the error amplifier that receives a control voltage from the error am... | 06/21/2011 |
| 7956589 | Compensation network for error amplifier of a low dropout regulator An error amplifier of a low dropout regulator includes a compensation network configured to adapt the error amplifier to varying load currents. The compensation network may be coupled to an amplifier stage of the error amplifier. For example, the compensation networ... | 06/07/2011 |
| 7948223 | Constant voltage circuit using plural error amplifiers to improve response speed A constant voltage circuit that is capable of realizing high speed response with respect to an abrupt change in an input voltage or a load current is disclosed. The constant voltage circuit includes a first error amplifier with a high direct current gain and a secon... | 05/24/2011 |
| 7932707 | Voltage regulator with improved transient response Provided is a voltage regulator having satisfactory transient response characteristics. Because a PMOS (25) and an NMOS (24) pass drain currents (charge and discharge currents with respect to gate of PMOS (26)) based on the square of voltage (Δ... | 04/26/2011 |
| 7893672 | Technique to improve dropout in low-dropout regulators by drive adjustment An electronic device includes a low drop-out regulator for providing a regulated output voltage. The low drop-out regulator generally comprises a power MOSFET transistor having a gate coupled to a driver. The driver has a first path including an NMOS transistor and ... | 02/22/2011 |
| 7893671 | Regulator with improved load regulation A regulator to provide an output voltage of a constant level at an output node. In an embodiment, the regulator contains a pass transistor to provide a conductive path between a pair of terminals, with the resistance offered by the path being determined by a control... | 02/22/2011 |
| 7863876 | Built-in self-calibration (BISC) technique for regulation circuits used in non-volatile memory A reference voltage regulation circuit (143) is provided in which one or more input voltage signals (Vref, Vref′) are selectively coupled to a configurable amplifier (114) which is coupled through a sample and hold circuit (120) to a voltage f... | 01/04/2011 |
| 7847530 | Voltage regulator A voltage regulator is disclosed that includes first and second output transistors each outputting a current from the input terminal to the output terminal of the voltage regulator; and a control circuit part controlling the operations of the first and second output... | 12/07/2010 |
| 7782034 | Constant voltage power supply circuit and method of controlling the same A constant-voltage power supply circuit is disclosed that is able to prevent overshoot of an output voltage possibly occurring when changing a constant-voltage circuit in operation and is able to supply a constant output voltage. The constant-voltage power supply ci... | 08/24/2010 |
| 7777465 | Output transient responsive voltage regulator controlling apparatus and method A controlling method of a voltage regulator is provided. The voltage regulator at least includes a differential circuit and a pump high-voltage circuit which has a bias path, an output transistor and an output terminal. The controlling method includes steps of: prov... | 08/17/2010 |
| 7772815 | Constant voltage circuit with higher speed error amplifier and current limiting A constant voltage circuit is disclosed that includes an output voltage control transistor outputting a current to an output terminal; a first error amplifier circuit part controlling the operation of the output voltage control transistor; a second error amplifier c... | 08/10/2010 |
| 7772816 | Systems, methods, and apparatuses for implementing a load regulation tuner for linear regulation Embodiments of the invention may provide for a load regulation tuner that reduces the load regulation effect. The load regulation tuner may include a load current controlled current source that is responsive to a load current from a power transistor of a linear regu... | 08/10/2010 |
| 7772817 | Constant voltage circuit capable of quickly responding to a sudden change of load current A constant voltage circuit which is capable of quickly responding to a sudden change of an output voltage includes an output transistor, and first and second error amplifiers. The output transistor outputs a power with an output voltage and an output current to a lo... | 08/10/2010 |
| 7755339 | Regulator with error amplifier having low voltage and high voltage transistors A regulator for generating, from a first power supply voltage exceeding the breakdown voltage of a low voltage transistor block, a second power supply voltage lower than or equal to the breakdown voltage of the low voltage transistor block, includes an operational a... | 07/13/2010 |
| 7755338 | Voltage regulator pole shifting method and apparatus A voltage regulator comprises first and second amplifier stages, a common-source output stage and a feedback path. The output stage drives a capacitive load with a regulated voltage responsive to a signal applied to the output stage. The capacitive load sets the dom... | 07/13/2010 |
| 7728569 | Voltage regulator circuitry with adaptive compensation Voltage regulator circuitry is provided. The voltage regulator circuitry may contain a drive transistor that is controlled by the output of an operational amplifier. The drive transistor may supply a regulated voltage to a load. The operational amplifier may compare... | 06/01/2010 |
| 7710091 | Low dropout linear voltage regulator with an active resistance for frequency compensation to improve stability The present invention discloses an LDO (Low DropOut) linear voltage regulator, which is based on an NMC (Nested Miller Compensation) architecture and can be capacitor-free, wherein an active resistor is added to the feedback path of the Miller compensation capacitor... | 05/04/2010 |
| 7688051 | Linear regulator with improved power supply rejection A linear regulator for outputting a regulated voltage with improved rejection of high frequency components in the power supply. The linear regulator includes an op-amp connected in a linear feedback loop to drive first and second current legs based on a voltage refe... | 03/30/2010 |
| 7656139 | Creating additional phase margin in the open loop gain of a negative feedback amplifier system using a boost zero compensating resistor A low-dropout voltage (LDO) regulator that creates a zero in the open loop gain using a relatively small-sized current control element to divert part of the supplied load current through a “zero” resistor before adding it to the output load. The main part of the... | 02/02/2010 |
| 7612548 | Low drop-out voltage regulator with high-performance linear and load regulation A low drop-out voltage regulator with high-performance linear and load regulation, comprising: a reference voltage circuit, capable of providing a reference voltage; a differential amplifier; a power device, capable of driving a load resistor; a feedback circuit, di... | 11/03/2009 |
| 7612547 | Series voltage regulator with low dropout voltage and limited gain transconductance amplifier A voltage regulation circuit intended to generate a regulated voltage for an electronic device, comprising: a transconductance amplifier based on a pair of MOS type differential amplifiers, said amplifier having a first input onto which a reference potential is appl... | 11/03/2009 |
| 7598716 | Low 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 ... | 10/06/2009 |
| 7595616 | Control circuit for a polarity inverting buck-boost DC-DC converter A control circuit for a polarity inverting buck-boost DC-DC converter, includes an operational trans-conductance amplifier that has inputs to which a sensed voltage difference signal is applied and an output connected to an input of a voltage-to-duty-cycle converter... | 09/29/2009 |
| 7564230 | Voltage regulated power supply system A voltage regulator for providing a regulated voltage is disclosed. The voltage regulator comprises an error amplifying module and a regulator. The error amplifying module provides a reference voltage, based on an output voltage to be regulated. The regulator provid... | 07/21/2009 |
| 7554307 | Low dropout linear regulator having high power supply rejection and low quiescent current Methods and apparatus are disclosed for providing stable voltage references from within a low dropout voltage regulator. Some embodiments utilize dependable semiconductor inherent attributes to generate a voltage reference, such as a band-gap voltage reference. ... | 06/30/2009 |
| 7548045 | Low-consumption voltage regulator A voltage regulator having an input voltage and adapted to supply a regulated output voltage, the regulator including an AB class amplifier and a power transistor having a non-drivable terminal coupled to the input voltage, a non-drivable terminal coupled to a refer... | 06/16/2009 |
| 7541786 | Voltage regulator A voltage regulator including a voltage regulation unit and an over driving unit is provided. The voltage regulation unit outputs a corresponding output voltage according to an input voltage. The over driving unit is coupled between an input terminal and an output t... | 06/02/2009 |
