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| Number | Title | Issue Date |
| 8183843 | Voltage regulator and associated methods A regulated voltage is generated at an output terminal of a voltage regulator circuit having at least one input terminal. A feedback signal is coupled from a first transistor coupled in parallel with a first resistor between the output terminal and the input termina... | 05/22/2012 |
| 8179107 | Power supply circuit and electronic equipment A power supply circuit comprising: a voltage generating circuit configured to generate an output voltage of a target level from an input voltage; an overcurrent protection circuit configured to control the voltage generating circuit so as to stop an output current, ... | 05/15/2012 |
| 8148961 | Low-dropout regulator A low-dropout regulator includes: a first operational amplifier having a first input receiving an input voltage; a first P-channel MOSFET having a gate connected to an output of the first operational amplifier, a source connected to a power source terminal, and a dr... | 04/03/2012 |
| 8125204 | Two-stage power supply with feedback adjusted power supply rejection ratio The present invention discloses a power supply comprising: a switching regulator circuit converting an input voltage to an intermediate voltage; a low dropout linear regulator circuit converting the intermediate voltage to an output voltage so as to supply a load cu... | 02/28/2012 |
| 8067925 | Hybrid power converter Power converter circuits, structures, and methods are disclosed herein. In one embodiment, a hybrid converter can include: (i) a first switching device controllable by a control signal; (ii) an inductor coupled to the first switching device and an output; and (iii) ... | 11/29/2011 |
| 8044646 | Voltage regulator with quasi floating gate pass element Various apparatuses, methods and systems for a voltage regulator are disclosed herein. For example, some embodiments provide an apparatus for regulating a voltage including an N-channel transistor that is connected between an input and an output, an error amplifier ... | 10/25/2011 |
| 7982444 | Systems and methods for driving a transistor This disclosure relates to monitoring and controlling a voltage characteristic of a Drain Extended Metal Oxide Semiconductor (DeMOS) transistor. ... | 07/19/2011 |
| 7956588 | Voltage regulator A voltage regulator has an error amplifier circuit, and a phase compensation circuit having a capacitor connected in parallel to first and second series-connected resistors. A control transistor has its source-drain path connected between input and output terminals ... | 06/07/2011 |
| RE42335 | Single transistor-control low-dropout regulator A low-dropout regulator with a single-transistor-control providing improved transient response and stability is disclosed. The single-transistor-control provides a dynamic resistance at the output of the regulator for minimizing undershoot and overshoot, and hence i... | 05/10/2011 |
| 7928709 | Voltage regulator and AC-DC converter A voltage regulator is provided. An input node receives an input voltage. An output node provides a supply voltage. A first transistor is coupled between the input node and a node. A first resistor is coupled between the input node and a gate of the first transistor... | 04/19/2011 |
| 7928708 | Constant-voltage power circuit A differential amplifier receives a reference voltage and a divided voltage dividing an output voltage, and outputs a control voltage in accordance with the difference between the reference voltage and the divided voltage. The control voltage output from the differe... | 04/19/2011 |
| 7859235 | Constant voltage power supply circuit A first output transistor forms a first current path between an input and an output terminal and has a first control terminal applied with a first control signal. A second output transistor forms a second current path between the output and a ground terminal and has... | 12/28/2010 |
| 7855535 | Inrush current control One embodiment of the present invention includes a power supply system. The power supply system comprises a variable voltage source configured to provide and incrementally increase a control voltage associated with a pass-transistor. The power supply system also com... | 12/21/2010 |
| 7843180 | Multi-stage linear voltage regulator with frequency compensation A two-gain-stage linear error amplifier is provided with frequency compensation and independently selectable stage gains and a reasonably small compensation capacitor to promote stability with a reasonable phase margin over a wide load range so that the invention is... | 11/30/2010 |
| 7750611 | Internal voltage controllers including multiple comparators and related smart cards and methods A voltage controller may include a pulse generator and an internal voltage control circuit coupled to the pulse generator. The pulse generator may be configured to generate a control signal in response to at least one of a mode signal and/or an external voltage. The... | 07/06/2010 |
| 7723968 | Technique 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 c... | 05/25/2010 |
| 7675278 | Power distribution current limiting switch including a current limit blanking period providing a burst of current A method for operating a current limit power switch for supplying power to a load include activating the power switch to start supplying power to the load; limiting the current drawn by the power switch to a first current limit for a first, fixed duration; after the... | 03/09/2010 |
| 7652455 | Low-dropout voltage regulator with a voltage slew rate efficient transient response boost circuit A low-dropout (LDO) voltage regulator for generating an output voltage is disclosed. The voltage regulator includes a startup circuit, a curvature corrected bandgap circuit, an error amplifier, a metal oxide semiconductor (MOS) pass device and a voltage slew rate ef... | 01/26/2010 |
| 7642761 | Power 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 fi... | 01/05/2010 |
| 7605572 | Input current sensing AVP method for future VRM A voltage converter provides a desired voltage droop with load while avoiding output current sensing and active control/feedback circuits and avoiding excessive power dissipation from passive components by placing a sensing resistor in the low current, switched inpu... | 10/20/2009 |
| 7583067 | Variable power output regulator Power control circuitry and method for controlling a variable output DC power source. The power control circuitry may include a first comparator to compare a signal representative of an output current level of the variable output DC power source with a threshold lev... | 09/01/2009 |
| 7576523 | Power supply circuit and semiconductor memory A power supply circuit that outputs a set voltage from an output terminal, has a boosting circuit that boosts a voltage supplied from a power supply and outputs the voltage to the output terminal; a voltage detecting circuit that outputs a first detecting signal whe... | 08/18/2009 |
| 7567067 | Power supply, display device, and light source driving apparatus A power supply is provided, which includes a DC-DC converter being supplied with an external DC input voltage and a first switching control signal and outputting a duty sensing signal of which a magnitude is varied in accordance with the first switching control sign... | 07/28/2009 |
| 7557549 | Automatic output mode select for an actuator controller Methods and systems are disclosed for automatically controlling the mode of an output that can be coupled to one of several types of actuators or the like. In one illustrative embodiment, an actuator controller is provided that can automatically detect what controll... | 07/07/2009 |
| 7548044 | Constant-voltage power circuit with fold back current limiting capability A constant-voltage power circuit incorporating an over-current protection circuit having a fold back current limiting capability operative through low input voltages, and being capable of arbitrarily setting current outputs. The constant-voltage power supply circuit... | 06/16/2009 |
| 7538528 | Constant power foldback mechanism programmable to approximate safe operating area of pass device for providing connection to load System and methodology for supplying power to a load using a pass device for connecting the load. A current limit circuit prevents current supplied to the load from exceeding a current threshold. A foldback circuit modifies the current threshold in accordance with a... | 05/26/2009 |
| 7525294 | High-voltage regulator system compatible with low-voltage technologies and corresponding electronic circuit A voltage regulator system is provided, which receives a first voltage and produces a regulated voltage. Such a device does not include any transistor supporting the first voltage, but does include transistors supporting at most a second voltage lower than the first... | 04/28/2009 |
| 7459891 | Soft-start circuit and method for low-dropout voltage regulators A low drop-out voltage regulator having soft-start. A low drop-out regulator circuit is provided having an input node, an output node, a power FET connected by a source and drain between the input node and the output node, and a feedback circuit having an output con... | 12/02/2008 |
| 7456619 | Power supply circuit A power supply circuit includes a standard voltage generator, a regulator, a capacitor and a discharging circuit. The standard voltage generator is configured to generate a standard voltage. The regulator is configured to control an output voltage by use of a refere... | 11/25/2008 |
| 7443702 | High voltage start up circuit for power converters A start up circuit for power converters is presented. It includes a JFET transistor, a resistive device, a first transistor, a second transistor and a diode. The JFET transistor is coupled to a voltage source. The first transistor is connected in serial with the JFE... | 10/28/2008 |
| 7439718 | Apparatus and method for high speed voltage regulation A high-speed voltage regulating apparatus and a method for high-speed voltage regulation. The apparatus includes: (A) a regulator, adapted to provide a regulated voltage; (B) switching circuitry, connected to the regulator, adapted to either (i) connect the regulato... | 10/21/2008 |
| 7425812 | Ramp rate closed-loop control (RRCC) for PC cooling fans A fan controller may be integrated in silicon and may use an embedded microcontroller to implement a digital fan control algorithm. The microcontroller may continually monitor temperature and sample the speed of the controlled fan. The speed of the fan may be compar... | 09/16/2008 |
| 7420357 | Hysteretic DC/DC converter A hysteretic DC/DC converter is proposed that operates at a high switching frequency without producing undesired pulse bursts at the output. The converter has a converter power stage with a supply voltage input, a controlled voltage output and an enable input. A com... | 09/02/2008 |
| 7414384 | Series regulator circuit A series regulator circuit that enables detection of a voltage drop and reduces consumed current in a static state. A constant current source, which is connected to a power supply voltage line, is connected to a bipolar transistor. The bipolar transistor includes an... | 08/19/2008 |
| 7411367 | Full bridge circuit and DC motor capable of fixing output voltage and avoiding reverse current A full bridge circuit includes a first switch, a second switch, a third switch, a fourth switch, a first controller, a second controller, a first operational amplifier, a first multiplexer, a second operational amplifier, and a second multiplexer. The first controll... | 08/12/2008 |
| 7402984 | Oscillation sensor for linear regulation circuit An oscillation sensor for a regulator that provides dynamic control of a connection/disconnection of a compensation capacitance. The compensation capacitor is disconnected under normal operation and is automatically connected if oscillation is detected in the output... | 07/22/2008 |
| 7402985 | Dual path linear voltage regulator A voltage regulator comprising two feedback loops for regulating a load voltage, where the first feedback loop comprises a pass transistor to source current to the load, and the second feedback loop comprises a shunt transistor to shunt current from the pass transis... | 07/22/2008 |
| 7402970 | Electric power steering device The present invention includes a control part for controlling switching elements on diagonal lines in the upper and lower stage of an H bridge circuit respectively by different duty ratios based on a steering torque exerted on a steering system, and an electric powe... | 07/22/2008 |
| 7400121 | Soft-start system for voltage regulator and method of implementing soft-start A system and method to provide a slow start up voltage, such as that can slowly ramp up or down by cyclically coupling a pair of associated energy storage devices, such as capacitors, during a start-up phase. The cyclic coupling of the capacitors, in conjunction wit... | 07/15/2008 |
| 7397230 | Integrated FET synchronous multiphase buck converter with innovative oscillator A power conversion system, preferably a buck converter, having (i) an oscillator, (ii) a pulse width modulator, (iii) and a nonoverlap clock generator and level shifter, wherein the improvement comprises the elimination of an external resistor divider is described. ... | 07/08/2008 |
