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| Number | Title | Issue Date |
| 6781423 | High-voltage interface and driver control circuit A circuit and method are given, to realize a high-voltage control and driver interface as integrated circuit, especially for use in connection with four external components, inductor L and capacitor C as well as low-side and high-side switching transistors as found ... | 08/24/2004 |
| 6441673 | High-frequency resonant gate driver circuit for MOS-gated power switches A resonant gate driver circuit suitable for driving MOS-gated power switches in high-frequency applications recovers gate drive energy stored in the gate capacitance of the power switches, resulting in substantially lossless operation. The resonant gate d... | 08/27/2002 |
| 6433629 | Micropower differential sensor measurement A sensing device includes a Wheatstone bridge and a source of a stimulation configured to apply the stimulation across two electrodes of the Wheatstone bridge. The device also includes a timing sensitive circuit configured to detect timing of a signal app... | 08/13/2002 |
| 5654661 | Drive circuit for SCR device An SCR control circuit which drives the SCR between conduction and non-conduction states in accordance with values sensed by a polarity sensing circuit. The control circuit generating a signal for the gate which is of a constant value, at different temper... | 08/05/1997 |
| 5467049 | Solid-state switch A solid-state switch has a plurality of gate turn-off thyristors connected in the rungs of a ladder circuit and a plurality of diodes connected in the side rails of the ladder circuit. The anode of the first gate turn-off thyristor is connected to the cat... | 11/14/1995 |
| 5434522 | Frequency doubler circuit having a diode quad with a grounded port A microwave frequency doubler circuit, which includes a full wave rectifier for rectifying an input signal and to provide two outputs, and a differential amplifier having inputs connected to the two outputs.... | 07/18/1995 |
| 5434528 | Gate drive using continuous alternating power and a diode H-bridge A gate drive circuit for a power switching device having first and second power terminals and a gate terminal comprises an H-bridge rectifier having first, second, third, and fourth rectifiers, the anodes of the first and second rectifiers being mutually ... | 07/18/1995 |
| 5170334 | Bypass-pair control apparatus for thyristor bridge In a control apparatus for controlling the firing timing of each of thyristor valves constituting a thryistor bridge by use of at least two series of control systems, a bypass-pair control circuit for thyristor bridge includes a circuit for detecting the ... | 12/08/1992 |
| 4571499 | Circuit arrangement for switchover of load between different sources of alternating voltage Two sources of alternating current, such as taps of a supply transformer, e selectively switchable across a load by means of two circuit branches each provided with a main switch and a collateral network in parallel therewith, this network comprising a se... | 02/18/1986 |
| 4477748 | Solid state ballast A thyristor/capacitor inverter bridge energizes the lamp circuit with a high frequency oscillating voltage derived from full-wave rectified line voltage. Lamp current is regulated by a commutation circuit which is synchronized with zero crossings of the t... | 10/16/1984 |
| 4438487 | Digital phase-shifting circuit A digital phase-shifting circuit employed for a thyristor converter, which operates on a polyphase power supply. In the digital phase-shifting circuit which is simply constructed as a whole, a counter portion consists of an N-bit binary counter and a divi... | 03/20/1984 |
| 4338546 | Liquid level detection circuit for control of liquid level responsive device A liquid level presence detection circuit includes a selectively gatable TRIAC serially connected with a load and triggered into conduction by twin sensitive-gate SCR's connected anode-to-cathode with the gates of the SCR's connected to voltage divider ci... | 07/06/1982 |
| 4129785 | Solid state switch A solid state switch is provided which has four terminals, two for the A.C. power which is to be switched and two for signal input. The circuit comprises a full wave bridge rectifier having a light-activated silicon controlled rectifier connected across i... | 12/12/1978 |
| 4100435 | Phase control apparatus A phase control apparatus is disclosed wherein a pair of transistors are alternately switched by an A.C. signal source. Each of the transistors is connected in series with an auxiliary thyristor and a primary winding of a pulse transformer to a D.C. power... | 07/11/1978 |
| 4059792 | Method for producing rectifier with switches of asymmetric voltage breakdown strengths A rectifier for a medium voltage rectifier system as well as for high voltage-direct current transmission includes a plurality of thyristor switches. The switches have asymmetric voltage breakdown strengths, the asymmetry being at least 10% for the forwar... | 11/22/1977 |
| 4006367 | Solid state alternating current switching device A solid state alternating current switching device is described having a pair of series connected triacs in which the individual breakover voltages of the triacs are less than the peak line voltage and the sum of the individual breakover voltages is great... | 02/01/1977 |
| 3961204 | Firing circuit for an electric valve The invention concerns a circuit arrangement for firing an electric valve, particularly a thyristor, with a pulse capacitor which can be charged from the a-c voltage at the anode-cathode path of the electric valve by means of an external resistor and can ... | 06/01/1976 |
