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| Number | Title | Issue Date |
| 8072198 | Voltage regulator To provide a voltage regulator having improved response characteristics in case of overshoot. The voltage regulator includes: a transistor (303) for detecting an overshoot at an output terminal; and a current mirror circuit connected to the transistor (303... | 12/06/2011 |
| 8049475 | 5 volt tolerant voltage regulator A voltage regulator circuit comprises an error amplifier for generating an error signal responsive to a reference voltage in a feedback signal. A feedback circuit provides the feedback voltage signal to the error amplifier and a driver circuit provides regulated out... | 11/01/2011 |
| 7928710 | Voltage protection circuit for thin oxide transistors, and memory device and processor-based system using same Devices, reference voltage generators, systems and methods may include an embodiment of a voltage regulator output transistor using a thin gate insulator to provide a low output impedance despite having a semiconductor channel width that is relatively small. The out... | 04/19/2011 |
| 7782033 | Method for regulating a voltage and circuit therefor A voltage regulator having an overload protection circuit and a method for protecting against an output voltage being less than a predetermined level. The voltage regulator has an overload protection circuit coupled between a feedback network and a regulation sectio... | 08/24/2010 |
| 7723969 | System and method for providing a low drop out circuit for a wide range of input voltages A system and a method are disclosed for providing a low drop out circuit that can efficiently and correctly handle a wide range of input voltages. A power supply control circuit is provided for a low drop out circuit that comprises an operational amplifier that is c... | 05/25/2010 |
| 7714553 | Voltage regulator having fast response to abrupt load transients A voltage regulator includes an undervoltage detector having a charge transistor smaller than an output transistor of the voltage regulator, providing a detection path for fast response, compensating undervoltage without large control current when loading changes fr... | 05/11/2010 |
| 7710090 | Series regulator with fold-back over current protection circuit A series regulator with fold-back over current protection has a high ratio current mirror circuit located between a sense transistor and its voltage output terminal. The series regulator receives an input voltage at an input terminal and generates a stable output vo... | 05/04/2010 |
| 7701184 | Voltage protection circuit for thin oxide transistors, and memory device and processor-based system using same Devices, reference voltage generators, systems and methods are disclosed, including an embodiment of a voltage regulator output transistor using a thin gate insulator to provide a low output impedance despite having a semiconductor channel width that is relatively s... | 04/20/2010 |
| 7688050 | Switching power supply controller with unidirectional transient gain change A switching power supply controller has a nominal loop gain and transient loop gain that is only activated in response to an abrupt load change in one direction. The transient loop gain may be implemented with a series-connected diode and resistor combination arrang... | 03/30/2010 |
| 7667442 | Constant voltage power supply circuit and method of testing the same A constant voltage power supply circuit is provided with a constant voltage circuit part to convert an input voltage into a predetermined constant voltage, a first excessive current protection circuit part to control the constant voltage circuit part so as to reduce... | 02/23/2010 |
| 7652456 | Current direction detection circuit and switching regulator having the same A current direction detection circuit includes a monitoring transistor having a control terminal and an output terminal respectively connected with a control terminal and an output terminal of a ground side output transistor; an impedance element having one terminal... | 01/26/2010 |
| 7629783 | Ultra low dropout voltage regulator An ultra low dropout voltage regulator, which separately supplies operating power for internal circuits, but controls the operating power to perform the operation of a voltage regulator chip, so that an ultra low dropout voltage regulator can be designed to reduce s... | 12/08/2009 |
| 7622902 | Low drop out regulator with over-current protection An LDO with over-current protection includes a first and a second P-type transistor, a sensing resistor, a comparator, and an error amplifier. The channel aspect ratio of the first P-type transistor is much higher than that of the second P-type transistor. The first... | 11/24/2009 |
| 7592789 | Power supply and related circuits A controller circuit in a power supply system is configured to simultaneously control both a voltage regulator circuit and a dynamic power supply circuit. The controller circuit monitors voltage produced by the voltage regulator circuit. The voltage regulator circui... | 09/22/2009 |
| 7592788 | Control device of a switching converter with overcurrent protection circuit and related switching converter A control device of a switching converter having an input terminal, an output terminal and a semi-bridge of a first and second transistor coupled between the input terminal and a reference voltage, includes a first circuit for detecting a signal representative of th... | 09/22/2009 |
| 7576525 | Supply power control with soft start Charge storage devices (e.g., batteries or supercapacitors) need to be charged from time to time. In an apparatus, to protect a charge storage device as well as the supply used to charge it, the apparatus typically includes power loop control circuitry. One approach... | 08/18/2009 |
| 7570035 | Voltage regulator with a hybrid control loop A voltage regulator circuit and method are provided for regulating a voltage accurately in response to rapid variations in the regulator's load. The voltage regulator utilizes a hybrid loop; an embodiment of such utilization is exemplified by circuit 300. Amp... | 08/04/2009 |
| 7545127 | Power supply controller A parallel circuit 27 of a frequency control circuit 11 is provided as an external circuit. Thereby, the charging time t1 depends on the characteristics of the circuit elements, which are provided in the package of a semiconductor device 70 | 06/09/2009 |
| 7420356 | Current direction detection circuit and switching regulator having the same A current direction detection circuit includes a monitoring transistor having a control terminal and an output terminal respectively connected with a control terminal and an output terminal of a ground side output transistor; an impedance element having one terminal... | 09/02/2008 |
| 7402960 | LED-based lamp apparatus A LED-based lamp apparatus includes a LED unit having multiple LEDs connected in series, a step-up circuit for stepping up a power supply voltage by a switching action of a switching element to supply an electric current to the LED unit, a sensing element for measur... | 07/22/2008 |
| 7368895 | Apparatus for a power supply with brownout protection and the protecting method for the same An apparatus for a power supply with brownout protection and the method thereof are proposed. As a brownout condition occurs, the apparatus informs at least one microprocessor to process the shutdown process timely. The apparatus includes a power factor correction (... | 05/06/2008 |
| 7365451 | Power converter A power converter that can continue to operate after suffering a partial failure. The power converter includes multiple array transformers; normally-on switches connected respectively in series with the ends of each of the primary windings of the array transformers;... | 04/29/2008 |
| 7355375 | Dynamic bias circuit for use with a stacked device arrangement A regulator circuit includes a first transistor coupled to a supply voltage and a second transistor coupled between the first transistor and an output node. The regulator circuit also includes a dynamic bias circuit that may selectively provide a bias voltage to a g... | 04/08/2008 |
| 7348847 | Integrated implementation of a collector boost scheme and method therefor A collector boost circuit is disclosed for providing a first voltage in a first mode of operation to a power amplifier, and a second voltage in a second mode of operation to the power amplifier. The collector boost circuit uses a switch and an indicator signal for t... | 03/25/2008 |
| 7330018 | Step-down controller circuit A step-down controller has an input having a first and a second input terminal for applying an input voltage, an output having a first and a second output terminal at which an output voltage can be provided, a series circuit including a switch and an inductance whic... | 02/12/2008 |
| 7327546 | Power switching circuit with active clamp disconnect for load dump protection A power switching circuit supplying electrical power to a load comprising a power MOSFET semiconductor switch having a gate electrode and two main current carrying electrodes and a back biased body zener diode, an active clamp for clamping a voltage between one of t... | 02/05/2008 |
| 7323854 | Zero cancellation in multiloop regulator control scheme Control loops in a voltage regulator can be stabilized using minimal silicon area. A current limit signal, generated by a current limit control loop in the voltage regulator, can be divided to minimize a zero provided in a compensation set associated with a voltage ... | 01/29/2008 |
| 7315154 | Voltage regulator A voltage regulator has an output MOS transistor connected between a voltage source and an output terminal. A voltage dividing circuit is disposed between the output terminal and GND. An error amplifier receives a reference voltage from a reference voltage circuit a... | 01/01/2008 |
| 7283338 | Power supply device for low-voltage electronic residual current circuit breakers A power supply device for low-voltage electronic residual current circuit breakers includes an electronic rectifier stage suitable to receive in input a mains voltage and to generate a first unipolar voltage whose value depends on the value of the mains voltage, and... | 10/16/2007 |
| 7274177 | Overshoot suppression circuit for a voltage regulation module An overshoot suppression circuit comprises a switch for coupling to an output of a voltage regulation module and a voltage detector for detecting an output voltage at the output. When the load to the voltage regulation module changes from heavy to light to result in... | 09/25/2007 |
| 7268523 | Constant voltage power supply circuit and method of testing the same A constant voltage power supply circuit is provided with a constant voltage circuit part to convert an input voltage into a predetermined constant voltage, a first excessive current protection circuit part to control the constant voltage circuit part so as to reduce... | 09/11/2007 |
| 7265607 | Voltage regulator A device comprises an active-pull-up stage and an active-pull-down stage. The device receives at least one reference voltage and provides an regulated output voltage to at least one load. The active-pull-up and active-pull-down stages are adapted to source or sink a... | 09/04/2007 |
| 7262585 | Method and apparatus for bi-directional current limit in a dual-power source capable device A power supply system having a transistor, a linear regulator, a DC-DC converter, and a control circuit. The transistor has an input, a substrate, a first node, and a second node. The first node is operably coupled to a non-battery power source. A linear regulator i... | 08/28/2007 |
| 7248078 | Semiconductor device The semiconductor device according to the present invention comprises an output MOS transistor M0, an MOS transistor M3 connected between a gate G1 of the output MOS transistor M0 and a ground voltage GND, a parasitic transistor Tr1 | 07/24/2007 |
| 7233134 | DC-to-DC converter with fast load transient response and method thereof A DC-to-DC converter comprises a sense circuit to sense the output voltage of the converter to generate a feedback signal, a transconductive amplifier to amplify a difference between the feedback signal and a threshold signal to generate a first current and to gener... | 06/19/2007 |
| 7228508 | Fail-safe thermal sensor apparatus and method A fail-safe thermal sensor is implemented in an integrated circuit such as a microprocessor. The fail-safe thermal sensor monitors the temperature of the integrated circuit and halt logic halts operation of the integrated circuit in response to the fail-safe thermal... | 06/05/2007 |
| 7216064 | Method and apparatus for programmable thermal sensor for an integrated circuit A programmable thermal sensor is implemented in an integrated circuit such as a microprocessor. The programmable thermal sensor monitors the temperature of the integrated circuit, and generates an output to indicate that the temperature of the integrated circuit has... | 05/08/2007 |
| 7202647 | Power supply circuit A power supply circuit relating to the present invention comprises a differential amplifier for feeding out a voltage as a control voltage in accordance with a difference between a feedback voltage commensurate with an output voltage and a reference voltage, an outp... | 04/10/2007 |
| 7199566 | Voltage regulator A voltage regulator has an output transistor connected between a power supply and an output terminal, and a voltage amplifying circuit that compares a feedback voltage with a reference voltage to control the output transistor. A transient response improving circuit ... | 04/03/2007 |
| 7200373 | Antenna detection and diagnostic system and related method An antenna detection and diagnostic system and associated method, including current and voltage detection circuits, are disclosed for detecting antenna failure mechanisms for integrated radio receivers. Integrated current limit detection circuitry is disclosed that ... | 04/03/2007 |
