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| Number | Title | Issue Date |
| 8106635 | Power converter A power converter includes an input unit, an output unit, first and second capacitors connected in series, a first electric conduction control device, a second electric conduction control device, a third electric conduction control device, and a fourth electric cond... | 01/31/2012 |
| 8085006 | Shunt regulator A shunt regulator for stepping down an input potential to an output potential, has an input for applying the input potential, an output for tapping off the output potential and a voltage drop circuit, across which the voltage difference between the input potential a... | 12/27/2011 |
| 8063615 | Synchronous rectifier control for synchronous boost converter A synchronous boost DC/DC conversion system comprises an input for receiving a DC input voltage, an output for producing a DC output voltage, a power switch controllable to adjust an output signal of the conversion system, and an inductor coupled to the input. A syn... | 11/22/2011 |
| 8022679 | Systems and methods for fast switch turn on approximating ideal diode function A switching circuit approximating the fast switching characteristics and small forward voltage drop of an ideal diode is provided. The switching circuit may include a voltage multiplier circuit, a reservoir capacitor and a pull up switch configured to be coupled to ... | 09/20/2011 |
| 7977926 | Boost and up-down switching regulator with synchronous freewheeling MOSFET A freewheeling MOSFET is connected in parallel with the inductor in a switched DC/DC converter. When the freewheeling MOSFET is turned on during the switching operation of the converter, while the low-side and energy transfer MOSFETs are turned off, the inductor cur... | 07/12/2011 |
| 7948219 | Control circuit of synchronous rectification type power supply unit, synchronous rectification type power supply unit and control method thereof The control circuit comprises: a detecting portion COMP1 for detecting a status transition of a first signal FR at the connecting point P which changes at a constant cycle corresponding to current flowing through the antiparallel diode D when the main switch ... | 05/24/2011 |
| 7906942 | Control circuit of DC-DC converter with synchronous rectifier adjusting signal to improve efficiency at light loads and control method thereof A DC-DC converter of a synchronous rectifier type, a control circuit thereof and control method thereof, facilitates detecting and interrupting negative inductor current IL with low power consumption, high accuracy and a simple configuration and facilitates improvin... | 03/15/2011 |
| 7906943 | Boost converter with adaptive coil peak current A power conversion circuit operates in a discontinuous switching mode over a wide range of loading conditions and varies a coil peak current to maintain efficiency over the wide range of loading conditions. The coil peak current is adjustable based at least in part ... | 03/15/2011 |
| 7898228 | Reverse recovery current assisted body-controlled switch A synchronous switch uses body-control switches to control the polarity of the parasitic device, which can be used to reduce power consumption by the parasitic device in accordance with various operating conditions. A charge-supplying device (such as a capacitor) is... | 03/01/2011 |
| 7872455 | Low-power voltage reference A circuit provides a voltage reference using very low power. It can also be used as a shut regulator for a quiescent current as low as 1.5 μA. It includes a transconductance amplifier, a gain stage, and a power transistor. One embodiment of this invention utilizes ... | 01/18/2011 |
| 7746041 | Non-isolated bus converters with voltage divider topology A voltage converter having four switches Q1, Q2, Q3, Q4, connected in series and operated in pairs in a complementary fashion. An input voltage is provided across the four switches. A middle capacitor is connected in parallel with two mid... | 06/29/2010 |
| 7746042 | Low-noise DC/DC converter with controlled diode conduction The synchronous rectifier MOSFET in a Buck or boost DC/DC converter is operated as a current source rather than being turned off, thereby reducing undesirable losses in efficiency, the generation of unwanted electrical and radiated noise, and numerous other potentia... | 06/29/2010 |
| 7605571 | Switching regulator with lower transistor capable of two states of ON or low current The present invention discloses a switching regulator, which comprises: a first and a second transistors electrically connected with each other; a pulse width modulation control circuit for turning ON and OFF the first transistor and turning ON the second transistor... | 10/20/2009 |
| 7595613 | Method and apparatus for electronic power control The method of the invention in one aspect involves electronic power control by varying the amplitude of an electrical power supply voltage, independent of frequency, whereby the output frequency will always be the same as the input frequency. An electrical circuit a... | 09/29/2009 |
| 7570031 | Method and apparatus for preventing multiple attempted firings of a semiconductor switch in a load control device A two-wire load control device, such as a dimmer, is operable to control the amount of power delivered to an electrical load, such as a magnetic low-voltage (MLV) load, and comprises a bidirectional semiconductor switch, a timing circuit, a trigger circuit having a ... | 08/04/2009 |
| 7564225 | Low-power voltage reference A circuit provides a voltage reference using very low power. It can also be used as a shut regulator for a quiescent current as low as 1.5 μA. It includes a transconductance amplifier, a gain stage, and a power transistor. One embodiment of this invention utilizes ... | 07/21/2009 |
| 7557545 | Electric power unit operating in continuous and discontinuous conduction modes and control method therefor An electronic power unit includes first and second MOS transistors and a digital control circuit. The first MOS transistor applies a voltage to the load. The second MOS transistor remains on while the first MOS transistor remains off and rectifies the current flowin... | 07/07/2009 |
| 7535206 | Synchronous rectifying type switching regulator control circuit and semiconductor integrated circuit including the same A synchronous rectifying type switching regulator control circuit has a first reference voltage circuit that receives a soft start signal from a soft start circuit and outputs a first reference voltage. An error amplifying circuit amplifies a difference of the first... | 05/19/2009 |
| 7508174 | Anti-ringing switching regulator and control method therefor The present invention discloses an anti-ringing switching regulator, comprising a variable resistor, a transistor, and an inductor electrically connected to a common node, in which the variable resistor is electrically connected with an input voltage, the transistor... | 03/24/2009 |
| 7479767 | Power supply step-down circuit and semiconductor device A power supply step-down circuit is adapted to a semiconductor integrated circuit having a first operation mode and a second operation mode having a smaller current consumption than the first operation mode. The power supply step-down circuit includes a first step-d... | 01/20/2009 |
| 7417410 | Method and apparatus for power control A power control system includes a power reduction module operable to reduce power to a connected load, a switching module operable to selectively transfer power directly to the load or to the power reduction module, a harmonic reduction module connected to an output... | 08/26/2008 |
| 7382116 | Semiconductor device configured to control a gate voltage between a threshold voltage and ground A pair of upper and lower semiconductor switching elements can switch between the conductive state and the non-conductive state when control voltages vary. A controller controls the levels of the control voltages to alternately turn on the upper and lower semiconduc... | 06/03/2008 |
| 7362557 | Method, apparatus and article for bi-directional DC/DC power conversion A controller implements a state machine for operating the bi-directional power converter with a flexible load pattern while maintaining a thermal condition of the power converter within acceptable limits. The state machine implements a wait loop in response to selec... | 04/22/2008 |
| 7358932 | Driving circuit of a plasma display panel A driving circuit of a plasma display panel utilizes only one energy recovery unit for both sides of the panel capacitor. The driving circuit includes a panel capacitor having an X-side and a Y-side, a voltage clamping circuit and an energy recovery unit. The voltag... | 04/15/2008 |
| 7355569 | Driving circuit of a plasma display panel A driving circuit of a plasma display panel utilizes only one energy recovery unit for both sides of the panel capacitor. The driving circuit includes a panel capacitor having an X-side and a Y-side, a voltage clamping circuit and an energy recovery unit. The voltag... | 04/08/2008 |
| 7352544 | Method and apparatus for providing a remedial strategy for an electrical circuit A method and electrical circuit for dynamic reconfiguration of a DC-to-AC inverter comprising first and second power rails where each the rails has a power source. The method comprises monitoring the first and second power rails for short-circuit failure; and upon f... | 04/01/2008 |
| 7342372 | Method for power control of an electric motor The invention relates to a method for power control of an electric motor, in particular a motor for driving the suction fan of a vacuum cleaner connected to an AC mains power supply. The power control is effected by varying the phase angle of the electric alternatin... | 03/11/2008 |
| 7336057 | DC/DC converter A DC/DC converter includes: a boost converter that boosts an input voltage in accordance with a first control signal; an insulated converter that converts an output of the boost converter in accordance with a second control signal; a current sensor that detects an o... | 02/26/2008 |
| 7327203 | PWM signal generation circuit and PWM control circuit A PWM signal generation circuit and a PWM control circuit are provided in which the duty ratio is easily changed and which can also avoid adverse impact from ambient temperature changes and the like. At the beginning of charging a capacitor with a current flow, a vo... | 02/05/2008 |
| 7323850 | Current detection circuit and switching power supply using the same A current detection circuit of the present invention has a switching device 1; an auxiliary switching device 2; an offset voltage source comprising an offset resistor device 7 and a current source circuit 8; a compensation circuit, compri... | 01/29/2008 |
| 7317303 | Rectified power supply A power supply creates a voltage difference between high and low power supply rails. The power supply has a voltage signal source, a capacitive coupling element, energy storage element 12, first and second rectifying diodes, a regulator, and bypass means for ... | 01/08/2008 |
| 7315879 | Multiply-accumulate modules and parallel multipliers and methods of designing multiply-accumulate modules and parallel multipliers A multiply-accumulate module (100) includes a multiply-accumulate core (120), which includes a plurality of Booth encoder cells (104a). The multiply-accumulate core (120) also includes a plurality of Booth decoder cells (110... | 01/01/2008 |
| 7315151 | Method and apparatus for electronic power control The method of the invention in one aspect involves electronic power control by varying the amplitude of an electrical power supply voltage, independent of frequency, whereby the output frequency will always be the same as the input frequency. An electrical circuit a... | 01/01/2008 |
| 7309850 | Measurement of current-voltage characteristic curves of solar cells and solar modules A solar cell or solar module is measured during a short pulse of light in such a way that the resulting data for current and voltage at each light intensity is the same as would be measured under steady-state illumination conditions and therefore predictive of the a... | 12/18/2007 |
| 7301488 | Digital PWM controller for preventing limit cycle oscillations An apparatus and method for minimizing limit cycle oscillations within a switched power supply includes providing a programmable dither signal as an input to the digital control loop connected between an output and a control input of the switched power supply. The d... | 11/27/2007 |
| 7301830 | Semiconductor memory device and semiconductor device and semiconductor memory device control method A cell core unit and its peripheral circuit are driven by a relatively low voltage power supply. A constant voltage that does not depend on the power supply voltage is provided as a boosted voltage (VBOOST) to be supplied to a control signal for a word line of the c... | 11/27/2007 |
| 7301320 | On-chip high frequency power supply noise sensor The on-chip power supply noise sensor detects high frequency overshoots and undershoots of the power supply voltage. By creating two identical current sources and attaching a time constant circuit to only one, the high frequency transient behavior differs while the ... | 11/27/2007 |
| 7294992 | Semiconductor device, with an off detection circuit According to the present invention, a semiconductor device is provided wherein a stepdown-type DC-DC converter includes a first off detection circuit, a second off detection circuit, a capacitor, a capacitor, a diode, inverters, an inductor, a first level shift circ... | 11/13/2007 |
| 7285940 | Voltage regulator with shunt feedback A voltage regulator configured to receive a supply voltage from a voltage supply and provide a regulated voltage to digital circuitry is provided. The voltage regulator comprises first circuitry configured to inhibit high frequency energy generated by the digital ci... | 10/23/2007 |
| 7262981 | System and method for regulating resonant inverters A technique is provided for direct digital phase control of resonant inverters based on sensing of one or more parameters of the resonant inverter. The resonant inverter control system includes a switching circuit for applying power signals to the resonant inverter ... | 08/28/2007 |
