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| Number | Title | Issue Date |
| 6111769 | External driving circuit for bridge type synchronous rectification An external driving circuit (21) for a bridge type synchronous rectifier circuit (20) having a first and second first synchronous rectifier (Q3,Q4), a primary driving circuit (14), and a pair of totem pole drivers (16,18). The timing signal for the first ... | 08/29/2000 |
| 6104623 | Multiple output converter having secondary regulator using self-driven synchronous rectifiers A DC--DC converter includes a transformer having at least a primary winding, a secondary winding and a drive winding. An input circuit is coupled to the transformer primary winding for coupling an input DC voltage to the transformer primary winding. A fir... | 08/15/2000 |
| 6101108 | Regulated input current, regulated output voltage power converter The power conversion system of this invention achieves precisely regulated input current and precisely regulated output voltage in a two step process whereby one power converter sub-system (141) provides input current regulation and a second power convert... | 08/08/2000 |
| 6101104 | Predictive threshold synchronous rectifier control A method and apparatus are disclosed for controlling the operation of a synchronous rectifier used in power conversion circuitry. The disclosed method and apparatus senses the voltage across the synchronous rectifier, and turns the synchronous rectifier O... | 08/08/2000 |
| 6091616 | Drive compensation circuit for synchronous rectifier and method of operating the same For use with a synchronous rectifier coupled to a secondary winding of a transformer and having a rectifier switch, a circuit for, and method of driving the rectifier switch and a power converter employing the circuit or the method. In one aspect of the p... | 07/18/2000 |
| 6084785 | Electric power converter An electric power converter having an AC input and AC output, and comprising a power rectifier and a power inverter having a DC three-wire circuit, wherein means for detecting a current or a voltage is connected between the AC power source and ground. Whe... | 07/04/2000 |
| 6084792 | Power converter with circuits for providing gate driving A power converter using a switching signal having at least three levels of amplitude, one of which amplitude levels has a zero amplitude level during a predetermined switching interval, is provided. The power converter includes a circuit module having fir... | 07/04/2000 |
| 6081434 | Insulation-type DC-DC power conversion unit and electric system for electric vehicle A switch circuit comprising a semiconductor switch and an inverse-parallel diode is connected between a main electricity storage unit 4 and a primary winding 142P of an insulating transformer 142 and a switch circuit including a semiconductor switch and a... | 06/27/2000 |
| 6078512 | Voltage rectifying device with integrated components In one embodiment, the voltage rectifying device includes two input terminals for an AC voltage, rectifying means made using integrated technology within a semiconductor substrate, and two output terminals for a rectified voltage, one of these output term... | 06/20/2000 |
| 6067242 | Current balanced arms of AC/DC bridge rectifiers A power converter comprises parallel circuits by providing two series circuits composed by self-arc-suppressing semiconductors, reactors and diodes. Moreover, unbalance of the currents flowing in the two parallel circuits is prevented by connecting the te... | 05/23/2000 |
| 6067243 | AC-AC/DC converter An AC-AC/DC converter for converting an AC input or an AC input voltage-divided by a capacitor into a high frequency AC. The converter includes a modulator for turning bi-directional AC switches on and off to convert the AC input or the AC input voltage-d... | 05/23/2000 |
| 6064580 | Switching power supply A switching power supply has first and second switching elements that are alternately turned on to cause an alternating current to flow through a primary winding of a transformer. The alternating current flowing through the primary winding induces voltage... | 05/16/2000 |
| 6055170 | Prediction methods and circuits for operating a transistor as a rectifier Circuits and methods are provided for operating a transistor as rectifier based upon the detected Vds of the transistor. In sensing the Vds voltage of the SRMOS, during positive conduction, the SRMOS body diode will conduct and the Vds of the SRMOS become... | 04/25/2000 |
| 6052299 | Robust LC full-wave bridge rectifier input structure A Full-Wave Bridge Rectifier (FWBR) input structure for use in an electrical system is delineated comprising, in combination, a pair of input nodes, and a pair of parasitic BJTs coupled in parallel with the pair of input nodes wherein each parasitic BJT h... | 04/18/2000 |
| 6038150 | Transistorized rectifier for a multiple output converter A secondary subcircuit of a converter circuit is disclosed where a method and circuit for operating a transistor to prevent reverse conduction of the current in the secondary subcircuit is disclosed. The diode in the secondary subcircuits of the prior art... | 03/14/2000 |
| 6038148 | Self-driven synchronous rectification scheme A self-driven synchronous rectifier circuit (42) for a power converter. The circuit comprises a transformer (49, 70) having a secondary winding with a first and second terminal, a first synchronous rectifier (14) coupled to the second transformer terminal... | 03/14/2000 |
| 6038154 | Circuit and method for controlling a synchronous rectifier converter For use in a power system having a power train, a rectifier having an input and an output and a method of controlling the rectifier. The rectifier comprises: (1) switching circuitry coupled between the input and the output, the switching circuitry adapted... | 03/14/2000 |
| 6038152 | Active rectifier utilizing a fixed switching pattern An active rectifier circuit includes a rectifier bridge having a plurality of passive rectifiers and a switching element coupled across each passive rectifier. A control circuit is coupled to the switching elements and senses reactive current flow and inc... | 03/14/2000 |
| 6038146 | High power factors, single stage harmonics correction converter An AC-to-DC power converter (power supply) with high power factors and which minimizes the input charging current flowing through the separate inductor by locating the separate inductor between a full-bridge rectifier and the transformer but out of the st... | 03/14/2000 |
| 6031744 | Circuit arrangement for switching network sections with several load-independent output voltages Circuit arrangement for controlling several output voltages of a converter, in which the output voltages increase in approximately the same proportion as the voltage potential adjacent to the control element of a control unit. The target value of the volt... | 02/29/2000 |
| 6026005 | Single ended forward converter with synchronous rectification and delay circuit in phase-locked loop A power converter including a switching transformer having a primary winding and a secondary winding, the secondary winding having first and second voltage nodes across which a winding voltage having a variable duty cycle and phase is impressed; a first s... | 02/15/2000 |
| 6021059 | Integrated synchronous rectifier for power supplies A timing circuit generates timing signals for a synchronous rectifier directly from the transformer power output winding. A phase detector detects the phase of the voltage on the output winding. A switched current source generates a digital timing signal ... | 02/01/2000 |
| 6011703 | Self-synchronized gate drive for power converter employing self-driven synchronous rectifier and method of operation thereof For use with a synchronous rectifier of a power converter, a self-synchronizing drive circuit and a method of driving the synchronous rectifier. In one embodiment, the circuit includes: (1) a drive winding, associated with an isolation transformer of the ... | 01/04/2000 |
| 6005779 | Rectification and inversion circuits A circuit used to convert a DC input to an AC output includes a pair of series circuits. Each of the series circuits is in parallel with the DC input and includes a switch and a transformer primary. A capacitor couples the two series circuits, and is atta... | 12/21/1999 |
| 6002597 | Synchronous rectifier having dynamically adjustable current rating and method of operation thereof A synchronous rectifier, a method of operating the same and a power converter incorporating the synchronous rectifier or the method. In one embodiment, the synchronous rectifier includes: (1) a plurality of parallel-coupled active rectifier circuits, each... | 12/14/1999 |
| 5999849 | Low power rectifier circuit for implantable medical device A low power switched rectifier circuit is realized using P-MOS and N-MOS FET switches that are turned ON/OFF at just the right time by a detector and inverter circuit (which form an integral part of the rectifier circuit) to rectify an incoming ac signal ... | 12/07/1999 |
| 5999420 | Switching power source There is disclosed a synchronized rectifier type switching power source device in which losses and noise generation due to differences in operating delay times in the input and output switching elements can be suppressed. A signal timing adjusting device ... | 12/07/1999 |
| 5991167 | DC to DC power converter including synchronous output rectifier circuit A DC to DC power converter which can suitably be used, for example, in a charger device for rechargeable batteries has an input and a load output, a resonant transformer provided with a transformer input and a transducer output coupled to the load output,... | 11/23/1999 |
| 5956245 | Circuit and method for controlling a synchronous rectifier converter A rectifier having an input and an output and a method of controlling the rectifier. The rectifier comprises: (1) switching circuitry coupled between the input and the output, the switching circuitry adapted to operate in selected one of (a) an active bid... | 09/21/1999 |
| 5946207 | Power supply having a synchronous rectifier circuit for improved switching timing A power supply includes a transformer (TR) having a first winding (N1) for receiving an input signal (Ui) and a second winding (N2) for supplying an output signal (Uo). Switching means (SM) are coupled in series with the first windin... | 08/31/1999 |
| 5940287 | Controller for a synchronous rectifier and power converter employing the same For use in a power converter having a power switch and a synchronous rectifier device coupled between an input and an output thereof, a transient response network, method of disabling a synchronous rectifier device and power converter employing the networ... | 08/17/1999 |
| 5929663 | Control circuit for distributed electrical equipment A control circuit for distributed electrical equipment includes a relaxation oscillator configured for voltage to frequency conversion whereby the output frequency is proportional to the input voltage signal. An opto-coupler provides voltage isolation to ... | 07/27/1999 |
| 5930134 | Starting system for a prime mover A starting system for a prime mover coupled to a generator includes a step-up inverter which converts DC power at a first voltage into AC power at a second, higher voltage. Halfwave pulses in the AC power are selectively applied to the generator by a puls... | 07/27/1999 |
| 5929586 | Vehicular motor driving apparatus A vehicular motor driving apparatus includes a control unit 15 for drive-controlling a motor by PWM-drive-controlling a motor driving circuit based on a motor starting signal. The control unit has a drive controller for setting a drive frequency of a PWM-... | 07/27/1999 |
| 5923152 | Power factor correction circuit with soft switched boost converter A boost converter for a power factor correction circuit having application in a DC power supply for telecommunication equipment. The boost converter has a pair of independently controlled switches such as MOSFET in series with an inductor. A capacitor is ... | 07/13/1999 |
| 5920475 | Circuit and method for controlling a synchronous rectifier converter For use in a power system having a power train, a rectifier having an input and an output and a method of controlling the rectifier. The rectifier comprises: (1) switching circuitry coupled between the input and the output, the switching circuitry adapted... | 07/06/1999 |
| 5907481 | Double ended isolated D.C.--D.C. converter A D.C.--D.C. down converter utilizes a controlled converter primary switching circuit and a full-wave rectified secondary circuit employing synchronous rectification. An isolation transformer having split first and second secondary windings supplies curre... | 05/25/1999 |
| 5898584 | Circuit for supplying power to ceiling fan Disclosed is a power supplying circuit for a ceiling fan including a protecting unit, a power supplying unit and a rectifying unit. An operation of the power supplying circuit is divided into four cases which are a negative half cycle loop, a positive hal... | 04/27/1999 |
| 5892674 | Method and apparatus for power converting AC into DC or DC into AC by converter having common phase connection In a power converter apparatus having a three-phase AC power supply connecting unit, a positive side capacitor, a negative side capacitor, first-phase and third-phase converting circuits each including switching elements connected in series, and a common ... | 04/06/1999 |
| 5889667 | Quasi-resonant buck converter with soft switching A rectifier circuit in a three-phase bridge connection includes four-segment main switches. Resonance capacitors are each connected in parallel with a respective one of the main switches. An auxiliary commutation device is connected between two DC termina... | 03/30/1999 |
