Matches 151 - 200 out of 438 < 1 2 3 4 5 6 7 8 9 >
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5473498 Power amplifier over-voltage protection circuit  
An apparatus and method of accomplishing over-voltage protection for variable power levels and frequency applications including the microwave range. Clamping means are provided that instantaneously...
5465190 Circuit and method for protecting power components against forward overvoltages  
A circuit protects a power transistor of the vertical MOS or IGTB-type during the off state against forward overvoltages. The protection circuit includes a first circuit for limiting the voltage...
5453900 Protective circuit for a power MOSFET that drives an inductive load  
A protective circuit configuration for a power transistor having a load circuit and a control terminal includes an inductive load connected into the load circuit of the power transistor. A further...
5422777 Low capacitance protection circuit for telephone equipment  
An overvoltage protection circuit comprises three protection components (21, 22, 23) connected by their first terminal to a common point (C) and by their second terminal to a first conductor (A),...
5414583 Current source bus terminator with voltage clamping and steady state power reduction  
A bus terminator, for a computer bus, which is capable of providing maximum allowable current to the bus, voltage clamping of the bus and steady state power reduction when the bus is in the...
5401984 Semiconductor component for transient voltage limiting  
A semiconductor component for limiting transient voltages on the signal or other supply lines of a system, includes, in a common semiconductor body, a plurality of multi-junction diodes connected...
5398148 Protection circuit for high side drivers  
A protection circuit for high side drivers is dependent upon load impedance to operate. The protection circuit includes a plurality of transistors and resistors and also a capacitor. The circuit...
5392188 Power surge transient voltage protection and filtering circuit having current controlling characteristics  
A power surge and transient voltage protection circuit includes a plurality of MOVs connected across power conductors leading to a load. The MOVs are in parallel with each other and in parallel...
5387826 Overvoltage protection against charge leakage in an output driver  
The present invention provides in some embodiments output buffers and input/output buffers which block the charge leakage from the bus to the internal power supply when the bus voltage exceeds in...
5381056 CMOS buffer having output terminal overvoltage-caused latch-up protection  
A CMOS buffer circuit includes a p-channel MOS transistor having a source terminal connected to an operating voltage source and a substrate terminal connected to a pump voltage source. A first...
5379175 Integrated circuit device having high abnormal voltage detection circuit  
A semiconductor integrated circuit device includes an internal logic circuit which is reset in response to a reset signal, and an abnormal voltage detection circuit, operatively connected to said...
5357393 Integrated ultra low leakage high voltage protection circuit  
An integrated high voltage device with an ultra low leakage input protection circuit to be used in highly sensitive circuits which require ultra low input leakage current. The protection circuit...
5333093 Protection apparatus for series pass MOSFETS  
In order to restrict the voltage across the gate oxide of an input pass-through transistor which operates as an input signal source to a MOS inverter, a MOS transistor wired as a MOS diode is...
5301081 Input protection circuit  
A depletion-mode MESFET is connected between an RF input terminal and ground. The gate is connected to a negative reference voltage via a bias resistor and to ground via a capacitor. A detector...
5276605 Negative half-wave summing rectifier apparatus for a three phase AC voltage  
The phase voltages of a three phase alternating current input voltage are converted into currents. The negative half-cycles of the currents are added and the polarity of the added current is...
5272392 Current limited power semiconductor device  
A current limit circuit for protection of an intelligent power switch includes a series circuit of a sense transistor and a sense resistor coupled to the power semiconductor transistor switch so...
5243488 Protection circuit limiting overvoltages between two selected limits and its monolithic integration  
A circuit for protecting lines such as telephone lines against positive or negative overvoltages having respective determined minimum values (+V1 and -V2). Between a common point (C) and a first...
5235489 Integrated solution to high voltage load dump conditions  
A structure for protecting an integrated circuit against high supply line voltages is formed in an epitaxial silicon layer of one conductivity type on a semiconductor substrate of another...
5212618 Electrostatic discharge clamp using vertical NPN transistor  
An electrostatic discharge protection clamp particularly useful for with bipolar and biCMOS integrated circuits include an NPN transistor formed in an isolated tub in an epitaxial layer grown on a...
5202811 Electrical power system with high voltage protection responsive to plural control voltages  
Disclosed is an electrical power system adapted to receiving power from a source of alternating current, typically a small alternator and supplying a direct potentially to a load. This power system...
5198957 Transient protection circuit using common drain field effect transistors  
A transient protection circuit provides protection from high voltage transients appearing along a transmission line by sensing a predetermined threshold of the voltage developed thereon and opening...
5187653 Current limiting device  
A current limiting circuit for limiting current surges caused by device turn-on and by input line voltage surges. The circuit has a current sensor for sensing current surges and causing the current...
5172215 Overcurrent-limiting type semiconductor device  
An overcurrent-limiting type semiconductor device comprising a transistor chip fixed on the bottom of a package, the package being constructed of a bottom plate, side walls, and a lid, terminal...
5162888 High DC breakdown voltage field effect transistor and integrated circuit  
A field effect transistor device formed on an integrated circuit chip substrate and driven by the on-chip voltages having a well region formed in the substrate, and source and drain regions one of...
5157574 Overvoltage protector for rectifier/inverter bridges  
A device for overvoltage protection of rectifier/inverter bridges employing gate-controlled solid-state switches without zero diodes is disclosed. To protect at least the solid-state switches of...
5157571 Circuit arrangement for protecting an input of an integrated circuit fed from a supply voltage source from overvoltages  
A circuit arrangement for protecting an input of an integrated circuit (14) fed from a supply voltage source from overvoltages contains an input (26) which is connected to the input (12) of the...
5150271 Telecommunication equipment protector  
A simplified solid state transient voltage and overcurrent protector for telecommunications equipment providing uniform protection characteristics between telephone lines and between either line...
5146384 Automatically resetting protection arrangement for a telephone subscriber line interface circuit  
A protection arrangement for coupling a two-wire line to a SLIC includes surge protecting triacs between each wire and ground, and normally closed contacts coupling the wires to the SLIC. The...
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)...
5130881 IC socket having overvoltage protection  
An IC socket having internal MOV devices for protecting an integrated circuit from damage due to transient overvoltages. Each MOV device is coupled between a lead of the socket and a common...
5119263 Negative overvoltage protection circuit for insulated vertical PNP transistors  
A negative overvoltage protection circuit for an insulated vertical PNP transistor the emitter whereof defines the input, the collector whereof defines the output and the base whereof is connected...
5105328 Semiconductor circuit having an excess voltage protection circuit  
A semiconductor circuit has d.c. supply lines (10/13,11/14) and an excess voltage protection circuit. The protection circuit comprises a switching transistor (T1) connected in series with one of...
5099381 Enable circuit with embedded thermal turn-off  
An enable circuit that integrates thermal shutdown capability. The enable circuit utilizes a temperature insensitive threshold detector network that provides a desired biasing current when the...
5095228 Circuits for preventing breakdown of low-voltage device inputs during high voltage antifuse programming  
A circuit for isolating a first low-voltage circuit mode from a second circuit node which carries high programming voltages during programming of user-programmable interconnect elements includes a...
5070426 Clipper circuit for power transistor circuit and inverter circuit utilizing the same  
A clipper circuit includes an auxiliary diode connected between a capacitor and diode, themselves forming a clipper circuit. The auxiliary diode thus forms an auxiliary clipper circuit taking the...
5059831 Buffer circuit with an electrostatic protector  
A buffer circuit comprises an interface node, a bipolar transistor having a collector connected to a first power source, an emitter connected to a second power source, and a base, for transferring...
5053643 Integrated circuit including output circuit having input logic controlled by output logic  
An integrated circuit includes an output circuit, a conducting circuit, a trigger voltage generator and a connecting circuit. The output circuit has an input terminal and an output terminal and...
5051618 High voltage system using enhancement and depletion field effect transistors  
An enhancement mode field effect transistor and a depletion mode field effect transistor are connected in a circuit to provide for a conductivity of the transistors during a first polarity in an...
5043782 Low voltage triggered snap-back device  
A protection device for an integrated circuit includes short and longer channel length structures, each of which provides a parasitic bipolar transistor, connected between a terminal of the...
5041940 Power transistor control circuit particularly for switching incandescent lamps  
A method and apparatus for switching an electrical load, such as an incandescent lamp, with a FET and providing protection for the FET. An exponential reference signal is generated which is a...
5031066 DC isolation and protection system and circuit  
A precision analog electronic circuit that is capable of sending accurate signals to an external device that has hostile electric characteristics, including the presence of very large common mode...
5027252 Semiconductor input protection device  
A semiconductor input protection device is disclosed which comprises a well type punch-through transistor consisting of a pair of parallel-opposed well layers through intermediation of a field...
5025419 Input/output circuit  
An input/output circuit wherein a plurality of data lines are provided with a serial/parallel conversion means common to all, so that the circuit is enabled to consume less power and draw a reduced...
5023746 Suppression of transients by current sharing  
A multiple element current sharing surge voltage protector is connected in parallel between a voltage source and the input of an electrical load. The protective network includes a low pass shunt...
5004970 Device and a process for detecting current flow in a MOS transistor  
In a device for detecting the flow of a current lower than a given threshold current in a load (L) in series with a power MOS transistor (M1), the free terminal of the MOS transistor is connected...
4996520 Overvoltage detection test apparatus for military aircraft weapons systems  
The test apparatus of the present invention tests the power supply on a military aircraft, which power supply provides power to missiles carried by the aircraft. The apparatus tests for an...
4984031 Integrated circuit arrangement  
In an integrated circuit arrangement with a protective arrangement at least partially integrated into it and protecting the integrated circuit arrangement from high-energy electrical faults, the...
4980792 BiCMOS power transition circuit  
A power transition circuit protects a bipolar-CMOS (BiCMOS) circuit during power transitions. Reference signals proportional to the voltage supplied to the protected circuit are monitored, and the...
4979068 High speed electronic circuit breaker  
An electronic circuit breaker has a switching transistor for controlling current flow in a circuit. The switching transistor is controlled by a pair of complementary field-effect transistors to...
4962320 Input protection circuit for MOS device  
An input protection circuit for MOS devices includes a first resistor and a first parasitic bipolar transistor connected between an input pad and an input buffer circuit of a MOS device. The input...
Matches 151 - 200 out of 438 < 1 2 3 4 5 6 7 8 9 >