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| Number | Title | Issue Date |
| 7872457 | Syncronous switching regulator control circuit A switching regulator includes a first switching regulator corresponding to a master channel, and a second switching regulator corresponding to a slave channel. The first switching regulator generates first output voltage Vout1 by a constant on-time system in... | 01/18/2011 |
| 7714549 | Switching regulator control circuit, switching regulator using the circuit, and switching signal generating apparatus A switching regulator includes a first switching regulator corresponding to a master channel, and a second switching regulator corresponding to a slave channel. The first switching regulator generates first output voltage Vout1 by a constant on-time system in... | 05/11/2010 |
| 7365997 | Synchronous switching control circuit for power converters The present invention provides a synchronous switching control circuit for variable switching frequency power converters. It comprises a first circuit to generate a first signal in response to an input synchronous signal of a power converter. A second circuit is cou... | 04/29/2008 |
| 7260013 | Power supply device in semiconductor memory A power supply device in a semiconductor memory includes a power control means and a power generation means. The power control means divides a self-refresh section into an active-precharge mode and an idle mode depending on an operation characteristic of the semicon... | 08/21/2007 |
| 7253592 | DC voltage converter and method for converting a DC voltage A DC voltage converter having a plurality of outputs and a method for converting a DC voltage into a plurality of output-side DC voltages is disclosed. A control unit is used to drive a first and a second switch to drive an energy store in such a manner that a plura... | 08/07/2007 |
| 7253600 | Constant slope ramp circuits for sample-data circuits A sample-data analog circuit includes a level-crossing detector. The level-crossing detector controls sampling switches to provide a precise sample of the output voltage when the level-crossing detector senses the predetermined level crossing of the input signal. A ... | 08/07/2007 |
| 7248026 | Single-pin tracking/soft-start function with timer control A voltage regulator includes a voltage divider connected between a soft-start pin and the voltage regulator's error amplifier. The voltage divider has the same divider ratio as that of the voltage regulator's feedback voltage divider, which is used to divide the reg... | 07/24/2007 |
| 7138791 | Logic controlled high voltage resonant switching power supply Methods and apparatuses for a low EMI power supply. The power supply may include a control circuit, a power switch connected to the control circuit, an anti-parallel diode connected to the power switch, an inductor coupled to the anti-parallel diode, an output diode... | 11/21/2006 |
| 7088600 | Startup via FB pin regulation An apparatus for reducing surge currents during startup of a voltage regulator is disclosed that includes circuitry for maintaining a voltage at an FB pin of the voltage regulator substantially equivalent to an output voltage of the voltage regulator. ... | 08/08/2006 |
| 7071661 | Method for the dynamically balancing series- and parallel-wired power semiconductor circuits A method for dynamically balancing the loads in a circuit (1, 4) of semiconductor power switches arranged in series or in parallel is disclosed. Individual switching signals (iG1, iG2) for the semiconductor power switches (S1 ... | 07/04/2006 |
| 7061216 | Static electric power converter for modulating electric power exchanged between at least a voltage source and a current source A static electrical energy converter modulates the electrical energy exchanged between at least two electrical sources. The converter includes at least one electrical voltage source, one current source and at least one electrical switching stage, each switching stag... | 06/13/2006 |
| 6965223 | Method and apparatus to allow rapid adjustment of the reference voltage in a switching regulator A circuit and method for enabling a rapid adjustment of a reference voltage during a disable period such as a fault condition, shutdown condition, and the like, of a voltage regulator is described. A soft start circuit that is arranged to couple a reference voltage ... | 11/15/2005 |
| 6956361 | DC/DC converter employing synchronous rectification A DC/DC converter employing synchronous rectification includes an energy transfer switch, a diode, a synchronous switch, a processor and a memory subsystem. The processor estimates a diode conduction time and provides a control signal to the synchronous switch to ca... | 10/18/2005 |
| 6943535 | Multiple-phase DC-DC converter topology A multiple-phase DC—DC converter adds at least one additional phase to an N-phase DC—DC converter to improve the converter's response to changes in load. In one embodiment, an additional phase operates at a switching frequency greater than that of the N phases, ... | 09/13/2005 |
| 6922042 | DC/DC converter A DC/DC converter produces from an input voltage a desired output voltage by first finding the error voltage between the output voltage and a first reference voltage and then controlling the output current according to the differential voltage between the error volt... | 07/26/2005 |
| 6915186 | System and method for synchronizing electrical generators A system and method for synchronizing a remote generator to a bus, whether or not power from the bus is available at the generator. The system includes: a first clock at a host site; a host timing processor for determining the time of a synchronizing event; a commun... | 07/05/2005 |
| 6909267 | Logic controlled high voltage resonant switching power supply Methods and apparatuses for a low EMI power supply. The power supply may include a control circuit, a power switch connected to the control circuit, an anti-parallel diode connected to the power switch, an inductor coupled to the anti-parallel diode, an output diode... | 06/21/2005 |
| 6654592 | Method and arrangement for adjusting output power of a transmitter power supply The invention relates to a method and an arrangement implementing the method for adjusting output power of a transmitter power supply, in which method the output power of the power supply is measured and the output power of the power supply is adjusted on... | 11/25/2003 |
| 6369551 | Method and apparatus for the supply of energy to a hearing device The present invention relates to a method to generate at least a supply voltage to supply energy to a hearing device, whereas the ratio between the supply voltage and the source voltage is adjustable. The hearing device substantially comprises a source (Q... | 04/09/2002 |
| 6269012 | Energy efficient power supply with light-load detection An output voltage of a rectification smoothing circuit is compared with a reference voltage. When a reduction in the output has been detected, an A/D converting circuit converts a result of the comparison which is negatively fed back by an output voltage ... | 07/31/2001 |
| 6225792 | Method and apparatus for the supply of energy to a hearing device The present invention relates to a method to generate at least a supply voltage to supply energy to a hearing device, whereas the ratio between the supply voltage and the source voltage is adjustable. The hearing device substantially comprises a source (Q... | 05/01/2001 |
| 6091234 | Control circuit of a synchronous rectification type DC-DC converter A DC-DC convertor is used as a power source for an electronic apparatus. In this converter, a synchronous rectification transistor is provided in parallel with a flywheel diode. A control circuit of the converter is configured in such a way that a synchro... | 07/18/2000 |
| 5847555 | Source voltage sensitive load controller An apparatus and method is provided for controlling electrical power from a power source to electrical loads in response to a decrease in power source voltage. A power source signal is compared to a predetermined signal voltage to determine whether and ho... | 12/08/1998 |
| 5489839 | Pulsed switching power supply for electroluminescent light centered on zero-crossing An A.C. power supply controller for a capacitive load such as an array of electroluminescent panels (1) having circuit elements (10 to 15) for producing a pulsed switching waveform (p) centered on the zero-crossing points (z) of an applied alternating vol... | 02/06/1996 |
| 5373224 | Method and apparatus for varying the power in a load connected to the mains A method for regulating the power in a load connected to the mains through a controlled switch and a device for implementing the method. The method includes the following steps: detecting a mains synchronization pulse, which determines the start of a cycl... | 12/13/1994 |
| 5331270 | Circuit array for limiting a load current by reverse phase angle control A circuit array, adapted to be coupled to a load and a source of a main AC voltage, for reverse phase angle control whereby a current flow in the load is limited to a defined phase angle () of the main AC voltage, comprising the following component... | 07/19/1994 |
| 5267120 | Relay control apparatus The operation of an electromechanical relay is synchronized with the power line waveform where an electrical power supply is supplied from a source to an electrical load. The current voltage supplied to the load is characterized by a power line waveform. ... | 11/30/1993 |
| 5227712 | Power supply for a battery charger A power supply (100) includes an energy source (102) which provides cyclically varying supply voltage having periodic repeated beginning points. Generally, the beginning points comprise zero potential points of the cyclically varying supply voltage. The e... | 07/13/1993 |
| 5004969 | Phase control switching circuit without zero crossing detection A method and circuit for reverse phase control of alternating current being delivered to a load are disclosed wherein voltage-controlled semiconductor switches, such as MOSFET's and IGBT's, are used as electronic switches to conduct voltage during the lea... | 04/02/1991 |
| 5003455 | Circuitry and method for controlling the firing of a thyristor Circuitry and methods are provided for AC line synchronization of the firing means for phase-controlled thyristors in a DC motor speed control system. A line synchronization method and system is disclosed which eliminates zero offset in the phase command ... | 03/26/1991 |
| 4996471 | Controller for an electrostatic precipitator A controller can control controlling a precipitator. The controller has a power modulator. The modulator has a control terminal and is coupled to the precipitator. The power modulator is adapted to be powered by an alternating current. The modulator can o... | 02/26/1991 |
| 4956599 | Power control apparatus A pair of static induction thyristors, which are coupled in parallel in the opposite bias directions between an AC power source and a load, is turned on by a light signal and is turned off by natural commutation, a light signal or an electric signal. The ... | 09/11/1990 |
| 4906820 | Temperature control method and circuit for controlling the temperature in a heatable compartment of an appliance The invention relates to a temperature control method and to a temperature control circuit. In a measured value detecting member (2) a measuring voltage (UTH) is generated which is representative of the actual temperature. In an adjustment memb... | 03/06/1990 |
| 4771224 | Digital pulse generator for controlled thyristor switches and motor drive embodying the same In a microcomputer-based multi-function thyristor-controlled AC induction motor drive, the microcomputer effectuates the several control functions of the motor drive during respective time intervals corresponding to the sequence of firing of the thyristor... | 09/13/1988 |
| 4766363 | Voltage limiting control system for heat emitting loads Power from an AC source is applied to a load under control of a power switching triac in response to signals from a feedback loop isolated from line voltage transients by means of a pair of opto-coupling devices respectively connecting the feedback loop t... | 08/23/1988 |
| 4617508 | Reverse phase-control apparatus for multiplexing interconnections between power switching and control circuit modules Multiplexing apparatus interconnects at least one power switching device, itself connected to a load for controlling of flow of current through that load from an AC source, with a control circuit for controlling conduction of the switching device(s). The ... | 10/14/1986 |
| 4490771 | Control circuit arrangement for an electromagnetically operated power tool A control circuit arrangement for an electromagnetically operated power tool has a primary circuit including a solenoid and a semi-conductor switch, in series, the semi-conductor switch being capable of being triggered into a conducting state upon applica... | 12/25/1984 |
| 4382223 | Voltage and frequency-controlled AC wave modifier A standard, unmodified AC induction motor has its stator winding energized from a sine wave power source through a signal-responsive wave modifier operative to control the portion of each cycle of the sine wave which is coupled from said source to the sta... | 05/03/1983 |
| 4326160 | Control unit for static converter A digital control unit for a static converter contains a binary-coded counter which counts the pulses of an oscillator. The counter outputs are connected to the address inputs of a function memory in which sawtooth or ramp functions are stored. The number... | 04/20/1982 |
| 4311955 | Phase control device which compensates for input variations A phase control device for use in a phase control circuit, which forms a comparison signal synchronous with an a.c. power source, then compares this comparison signal directly with a preset phase control angle signal, and controls a phase control element ... | 01/19/1982 |
