Class 327/465 - DC supply

Subclass of Class 327 - Miscellaneous active electrical nonlinear devices, circuits, and systems
Definition: Subject matter wherein the switching circuit is power supplied
No. of patents: 34
Last issue date: 12/27/2005

Number	Title	Issue Date
6978734	Electric fish barrier for water intakes at varying depths An electric fish barrier for deterring fish from entering a water intake in a reservoir or along a waterway has a set of conductive members at a first voltage potential and a second set of conductive members at a second voltage potential. The conductive members are ...	12/27/2005
6335894	Semiconductor integrated circuit device, method of investigating cause of failure occurring in semiconductor integrated circuit device and method of verifying operation of semiconductor integrated circuit device A NAND EEPROM is disclosed which is capable of variously setting, for each chip, the voltage to be applied to the control gates of memory cells. The semiconductor chip includes a NAND memory cell array and a high-voltage generating circuit for generating ...	01/01/2002
6172930	Semiconductor integrated circuit device, method of investigating cause of failure occurring in semiconductor integrated circuit device and method of verifying operation of semiconductor integrated circuit device A NAND EEPROM is disclosed which is capable of variously setting, for each chip, the voltage to be applied to the control gates of memory cells. The semiconductor chip includes a NAND memory cell array and a high-voltage generating circuit for generating ...	01/09/2001
5391951	Integrated circuit having an adjusting component and an adjustable thyristor An integrated circuit having an adjusting component and an adjustable thyristor allows an especially small chip surface to be used. The integrated circuit has a control unit, by means of which the adjusting component is irreversibly switched. The thyristo...	02/21/1995
5294849	Reflexive circuit A two-terminal device for connection by its two terminals into an electrical circuit having a power source or signal connected to an electrical load or signal receiver and a means for causing selected brief interruptions of the circuit, comprising an elec...	03/15/1994
5258670	Light triggered & quenched static induction thyristor circuit A LTQ (light triggered & quenched) static induction thyristor circuit of the present invention is to provide a LTQ static induction thyristor circuit obtaining an excellent dv/dt capability and operating ambient temperature characteristics, a large optica...	11/02/1993
5235215	Memory device for use in power control circuits A memory circuit which includes a memory SCR and an output SCR is provided. The memory SCR is coupled between the input terminal and the common terminal of the memory circuit wherein the input terminal is the control terminal of the output SCR and the out...	08/10/1993
5144392	Thin-film transistor circuit A thin-film transistor circuit (10) has a main thin-film transistor (Trl) and an input gate protection device (11) formed by first and second subsidiary thin-film transistors (Tr2) and (Tr3) connected in series and to the gate electrode (1) of the main th...	09/01/1992
5097160	Method of transmitting pulse signal and apparatus therefor A method of transmitting a pulse signal composed of a combination of a positive pulse and a negative pulse through a semiconductor switch providing a conduction modulation in the on-state, the positive pulse and negative pulse flowing through the semicond...	03/17/1992
4703411	Voltage converter with GTO thyristors in series connection with at least a choke with freewheeling circuit A voltage converter provided for use in power electronics, particularly as an inverter for generating alternating voltages for vehicle motors. Electric energy is supplied to the converter via direct-voltage connections (2, 3). The desired alternating volt...	10/27/1987
4674022	SCR priming and sweep-out circuit apparatus An improved priming and sweep-out circuit in which losses are obviated or minimized by transferring energy resulting from such processes back to the power supply, and wherein a single common storage inductance is used in a secondary winding circuit of a s...	06/16/1987
4651251	Protective circuitry for a thyristor A protection circuit for use with a thyristor having several break over diode, BOD, elements is connected between the anode and the gate of a thyristor providing static and dynamic overvoltage protection. With the exception of the BOD element connected to...	03/17/1987
4633094	Electronic switching apparatus The invention relates to a changeover discharge circuit for an electronic switching circuit of the type having a semiconductor switching element in series with a DC source and an inductive load. Initiation of the discharge current of a discharge capacitor...	12/30/1986
4613767	Low forward-voltage drop SCR An SCR having a reduced forward-voltage drop comprising an independently powered latch circuit driving an output transistor in combination with an additional turn-off transistor. The SCR provides saturated operation of the output transistor and self-commu...	09/23/1986
4429205	Induction heating apparatus An induction heating apparatus which includes an induction coil with an associated load and a resonant inverter circuit coupled to a DC power supply for energizing the heating coil. The inverter circuit includes a gate controlled thyristor which is cyclic...	01/31/1984
4377832	Voltage transient suppressor circuit A circuit for use with telephony systems or the like for protecting these systems, which may be comprised of integrated circuits, from high transient voltages. The circuit includes a silicon controller rectifier (SCR) having the cathode and anode coupled ...	03/22/1983
4338617	Four terminal GTO thyristor with transistor controlled turn-off A semiconductor element comprises the first conductive type first semiconductor layer (11) which has an exposed surface at the first surface side to contact with the first contact (21); the second conductive type second semiconductor layer (12) which forms the...	07/06/1982
4320314	Sequential logic element An integrated sequential logic element of the p-n-p-n type (TT2) having two complementary transistors and forming a flip-flop. The input of the flip-flop is connected to the output of an analog gate (TT1) having an input controlled b...	03/16/1982
4264830	Switching circuit for high-voltage thyristors To turn a thyristor, particularly a high-voltage thyristor, ON, and to connect the thyristor and the utilization circuit to a power source, a charge capacitor is connected to a charging circuit to charge the capacitor when the thyristor is blocked or in O...	04/28/1981
4256982	Electric pulse shaping circuit A pulse shaping and amplifying circuit is formed by connecting a capacitor in series with the primary winding of a pulse transformer, connecting normally open switching means in parallel with the capacitor and primary winding, and connecting this parallel...	03/17/1981
4246499	Pulse generating circuit A pulse generating circuit comprises means for charging from a DC power source through a resistor for charge to a capacitor; means for detecting a predetermined value of charge of the capacitor and triggering a main thyristor to discharge the charge of th...	01/20/1981
4230955	Method of and apparatus for eliminating priming and carrier sweep-out losses in SCR switching circuits and the like This disclosure is directed to SCR charging or other energy-switching circuits provided with priming and carrier sweep-out networks and the like that normally incur energy losses in the priming and sweep-out processes, wherein such losses are obviated by ...	10/28/1980
4231083	Power conversion apparatus When a power conversion apparatus such as inverter or chopper comprises gate turn-off thyristors (GTO's), current limiting reactors are connected to cathodes of the GTO's and opposite ends of each of the reactors are connected to positive and negative ter...	10/28/1980
4177479	Electrical circuit with a high-frequency thyristor fired by blocking leakage current A high frequency, high voltage thyristor and an associated circuit arrangement and method of operating the circuit are disclosed. The thyristor, which is capable of switching frequencies above 10 kHz and forward blocking voltages in excess of 500 V. inclu...	12/04/1979
4160172	Circuit for controlling demands of high current load The present circuit controls the high current delivered to a load from a direct current (d.c.) power supply through a pair of power silicon controlled rectifiers (SCRS). For each power SCR there is also employed an associated current conduction control SC...	07/03/1979
4153872	Crest firing means Power is applied to an AC load at the crest of a voltage waveform by employing a light emitting diode. The crest firing circuit further includes a detector responsive to the diode's light emitting properties which fires a semiconductor switching device th...	05/08/1979
4146803	Fire-responsive control device utilizing thyristors In a thyristor fire-responsive control device including a fire detector which has a thyristor as output switching means, a control circuit is responsive to the detector. A controlled apparatus is responsive to the detector through the control circuit for ...	03/27/1979
4122363	Circuit arrangement for obtaining a sawtooth current in a coil A circuit arrangement for obtaining a periodic sawtooth current in a coil, particularly in a deflection coil of a kinescope, is described. The circuit arrangement comprises a first, unidirectional conductivity device, disposed in parallel to a circuit bra...	10/24/1978
4107551	Thyristor turn-off system A thyristor turn-off system comprising: a thyristor having at least an anode, a cathode and a gate; a first reverse-bias means for applying reverse-bias between said anode and said cathode of the thyristor; a second reverse-bias means for applying reverse...	08/15/1978
4001607	Drive circuit for a gate semiconductor device A drive circuit for a gated semiconductor device includes a switching device which provides first and second conduction states. The switching device is coupled to a source of direct current potential by means of a first inductor and coupled to the gate of...	01/04/1977
3967138	Device for firing thyristor A capacitor charged with a voltage across anode and cathode of a thyristor after the voltage division and rectification is connected across gate and cathode of the thyristor through a switch while a diode with or without a series reactor is connected acro...	06/29/1976
3959670	Blasting machine A blasting machine comprising a pulse generator which delivers its pulses to a control signal transmitting circuit that in turn delivers the pulses to driven blast initiating circuitry. The control signal transmitting circuit includes an electronic switch...	05/25/1976
3956609	Pulse generator for electro-erosion machining apparatus A pulse generator for an electro-erosion machining apparatus wherein electrical discharges occur at a machining zone formed between an electrode workpiece and an electrode tool, the pulse generator comprising a capacitor charged from a source of direct cu...	05/11/1976
3944856	Chopper control system A system for controlling a thyristor chopper used for the speed control of a d.c. motor driving an electric car, in which means are provided for generating turn-on pulses and turn-off pulses at the maximum chopping frequency of the chopper, dividing the f...	03/16/1976

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Class 327/465 - DC supply