Matches 201 - 250 out of 440 < 1 2 3 4 5 6 7 8 9 >
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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...
4949212 Circuit configuration for protecting an integrated circuit  
A circuit configuration for protecting an integrated circuit from damage by a voltage present at an output exceeding the supply voltage range of the integrated circuit includes a given number of...
4941063 Telephone lines overvoltage protection apparatus  
Overvoltage protection arrangements are provided for a pair of telephone lines effective for suppressing noise and transient voltage signals occurring above data and voice signals carried on the...
4939331 Arrangement for controlling the microwave power of magnetrons  
An arrangement for controlling the microwave power of magnetrons, in which a multiple of magnetrons are connected in parallel with a power unit (3) for generating a high magnetron-operating...
4926280 Capacitor protection circuit for protecting storage capacitors in an electronic power supply  
A capacitor protection circuit for protecting bulk storage capacitors in a storage capacitor circuit in an electronic power supply. The capacitor protection circuit is operatively coupled to the...
4924341 Transient protector  
A transient protection circuit comprising using a circuit connected to operate as a diode while presenting lower forward voltage drop for the same area and current as in pn junction diodes to...
4922370 Automatically resetting circuit protector  
Circuit protectors employing a reed switch or electromechanical switching device, has a primary coil connected in series with it. Two resistors are connected across the switch/device and series...
4912589 Surge suppression on AC power lines  
A triggered surge suppression network is disclosed comprising a low voltage clamping device, a crowbar device and a trigger device. The voltage clamping device and the trigger device are connected...
4901183 Surge protection device  
A surge or transient protection circuit is described which operates in an immediate fail-safe mode of failure. If an incoming transient exceeds the transient absorption capacity of the circuit,...
4893158 MOSFET device  
A power MOSFET is provided with a protective circuit including a monitor MOSFET whose drain is connected with the drain of the power MOSFET, a monitor resistor connected betwen the sources of the...
4890012 An integrated controlled FET switch  
A switch means designed as an integrated circuit possesses two series-connected FETs (Q1P, Q2P; Q1N, Q2N) whose common switching point (N5, N6) is clamped via a clamp FET (Q3N, Q3P) to a reference...
4884161 Integrated circuit voltage regulator with transient protection  
A monolithic integrated circuit voltage regulator is disclosed in which a bipolar series pass transistor has both its collector and base electrodes protected from excessive positive and negative...
RE33087 Electric power distribution and load transfer system  
A power distribution system includes a plurality of power sources and load transfer units including transistors and diodes connected in series and leading to a common power output, each of the...
4870529 Active arc protection circuit  
An arc protection circuit is disclosed for protecting a component, such as a transistor, from the effects of arcs developed in a CRT. The protection circuit includes an arc sensing circuit coupled...
4868703 Solid state switching device  
A solid state switching device allows independent control of the latching and holding currents, and has particular application to telephone systems. The holding current may be set at a high level...
4860151 Electrical safety barriers  
An electrical safety barrier which is adapted to pass a current returning from a hazardous area to a safe area but which will transmit negligible energy from the safe area to the hazardous area...
4849846 Telephone protection circuit  
A circuit for protecting sensitive telephone equipment from voltage or current overloads on the TIP or RING line includes a resistor serially positioned in the line and a triac triggered by a...
4835416 V.sub.DD load dump protection circuit  
The present invention provides power supply load dump protection circuitry for insuring that supply voltages that are applied to the supply pad of a low current logic circuit and which exceed a...
4835650 Apparatus and method for minimizing the let-through voltage associated with circuits used in conjunction with electronic elements to suppress surges, transients and like electrical disturbances  
A surge protection circuit is adapted to have a minimum let-through voltage when a power surge is applied thereto. The circuit includes line conductors connecting a power source to an electrical...
4831323 Voltage limiting circuit  
A voltage limiting circuit with two-terminal network character is described which has a sharp-edged limitation characteristic curve and a short response time. According to the invention, this is...
4821136 Power transistor with self-protection against direct secondary breakdown  
A power transistor with self-protection against direct secondary breakdown comprises a plurality of elementary transistors having their emitter terminals mutually connected and forming a common...
4814931 Apparatus and method for timed-de-icing  
An all solid state timer-controller for the timed, sequential application of electrical current to loads within a circuit at high amperage, the circuit finding utility in the application of...
4810936 Failing lamp monitoring and deactivating circuit  
A discharge lamp monitoring and deactivating circuit includes a normally closed switch in series with the discharge lamp and its ballast and a detector circuit connected across the lamp to monitor...
4803527 Semiconductor integrated circuit device having semi-insulator substrate  
Disclosed is a semiconductor integrated circuit device forming MESFETs by use of a semi-insulator GaAs substrate which prevents destruction of an electrostatic destruction protect circuit and a...
4787007 Output driver circuit  
In an output driver semiconductor circuit, a protection circuit is used to protect the output NPN transistor from being destroyed. The protection circuit comprises an excessive current detector for...
4782419 Inhibitable static switch for an AC electric circuit including an inductive load  
A static switch is provided for controlling the closing and opening of an AC electric circuit including an inductive load. This switch includes an inhibitable thyristor having an RCD network for...
4777518 Semiconductor device including gate protection circuit with capacitor under input pad  
A semiconductor device including a gate protection circuit in which a N-type or P-type high-concentration impurity semiconductor region is formed under the input terminal such as a bonding pad and...
4757436 Current-type converter protecting apparatus  
In a current-type converter system in which a DC current is fed to a load through a pulsating current suppressing DC reactor from a current-type converter constituted by self-extinction elements...
4739436 Surge suppression circuit  
A voltage surge suppression circuit employs two series connected metal oxide varistors and a power interrupter to provide suppression of all modes of voltage surge while providing protection...
4736268 High frequency AC solid state switch  
An AC solid state switch includes an inverse parallel connection of a pair of silicon controlled rectifiers. A circuit branch which includes the series connection of the main conducting paths of a...
4723081 CMOS integrated circuit protected from latch-up phenomenon  
A CMOS integrated circuit formed in a first semiconductor substrate is supplied with a power through a power control circuit formed in a second semiconductor substrate. The power control circuit...
4719531 Overcurrent protective circuit for modulated-conductivity type MOSFET  
An overcurrent protective circuit for a modulated conductivity type MOSFET, i.e., a BIFET, which has a voltage detection circuit for detecting a voltage between the drain and source of the BIFET...
4712152 Semiconductor integrated circuit device  
A semiconductor integrated circuit device comprising: at least two NPN transistors whose bases and emitters are connected to the ground and whose collectors are connected to an input terminal; one...
4712153 Power circuit and trigger device comprising same  
A power circuit comprises a current amplifier circuit connected between a minimum potential line and a maximum potential line. It further comprises, connected between these lines together with the...
4710791 Protection device in an integrated circuit  
An I/O protection device which protects the IC from noise especially from static charge break down is disclosed. A resistance body made from polysilicon is provided between the I/O pad and I/O...
4709160 Solid state dc power switch  
A dc power switch responsive to an input signal referenced to a signal reference terminal and having a power input terminal connected to a dc voltage source and a power output terminal connected to...
4704654 Over-voltage protective circuit for semiconductor network  
To protect electrical equipment against excessive applied input signals which, for example, may be analog signals, excessive with respect to positive or negative excess voltage in relation to an...
4698721 Power line filter for transient and continuous noise suppression  
A power line filter suppresses or dissipates and clamps short rise time high voltage transients carried by power transmission lines and provides continuous protection against continuous type...
4697199 Semiconductor protection device having a bipolar transistor and an auxiliary field effect transistor  
A semiconductor device has a safety device which includes an improved lateral bipolar transistor structure. The improvement is obtained by incorporating an auxiliary field effect transistor which...
4695916 Protector circuit  
A protector circuit comprises series connection of a bidirectional voltage limiting element and a bidirectional thyristor between a signal line connected to a communication equipment and ground....
4689504 High voltage decoder  
A high voltage CMOS decoder and level translator for use in conjunction with EPROMS and EEPROMS utilizes additional series coupled field effect transistors maintained in an on condition so a to...
4688065 MOS type semiconductor device  
A MOS type semiconductor device with a gate protecting circuit for protecting an internal circuit is disclosed. Distance between the input section diffusion layer in the gate protecting circuit and...
4678950 Output circuit having an improved protecting circuit  
An output circuit which has an improved protection circuit against an abnormal voltage applied to an output terminal. The output circuit is of the type having first and second switching transistors...
4679111 Resistance to ground checker  
A circuit arrangement for monitoring ground faults to a normally ungrounded coil of a motor, the circuit arrangement including; a source of a low-level d.c. voltage, the source having first and...
4672226 Redundant resistance temperature detector power supply system  
A redundant power supply/signal conditioner system for a resistance temperature detector includes power supply/signal conditioner modules having first and second output terminals connected to a...
4667265 Adaptive thermal shutdown circuit  
An IC thermal shutdown circuit is based upon the thermal characteristics of a reverse biased PN junction diode. The leakage current, at bias levels below breakdown, is closely related to the high...
4661878 Overvoltage protection circuit  
An overvoltage protection circuit for directing a surge current on an input/output line, in particular, a telephone line, to a ground terminal when the surge current exceeds a predetermined level.
4658203 Voltage clamp circuit for switched inductive loads  
When in control circuit for varying the current through an inductive load the current is sent as pulses of variable width and each time that occurs is cut off by the electronic switch in series...
4656491 Protection circuit utilizing distributed transistors and resistors  
A protection circuit is composed of first and second regions formed in a semiconductor substrate so as to be operable as distributed transistors which have a large current capacity as a whole....
Matches 201 - 250 out of 440 < 1 2 3 4 5 6 7 8 9 >