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7561408 HF-controlled SCR-type switch  
A method for controlling an SCR-type switch, comprising applying to the switch gate several periods of an unrectified high-frequency voltage, the power of one HF halfwave being insufficient to...
7259407 Isolated HF-control SCR switch  
A vertical SCR switch to be controlled by a high-frequency signal having at least four main alternated layers. The switch includes a gate terminal and a gate reference terminal connected via...
6911830 Diesel engine lubricating oil contaminant sensor method  
A method by which contaminant (soot) content in Diesel engine oil is determined using electrical conductivity measurements of the Diesel oil at a high frequency, or by which contaminant (soot...
6563724 Apparatus and method for turning off BJT used as synchronous rectifier  
A bipolar junction transistor (BJT) used as a synchronous rectifier (SR) that is turned off by an active electronic device such as a transistor coupled between the base and collector of that SR...
6445561 Circuit arrangement, in particular for triggering an ignition end stage  
A circuit arrangement, in particular for triggering an ignition output stage, having a power switching transistor and a switchable freewheeling circuit or an auxiliary channel. The freewheeling...
6323718 Normally-on bidirectional switch  
The present invention relates to a normally-on bidirectional switch, including, in parallel between two power terminals of the switch, a first cathode-gate thyristor, the anode of which is...
6232822 Semiconductor device including a bipolar transistor biased to produce a negative base current by the impact ionization mechanism  
A semiconductor device includes a bipolar transistor whose emitter-collector voltage is set to satisfy a condition I BE <I CB according to a voltage applied across a base and emitter where I...
6188267 Normally conducting dual thyristor  
The present invention relates to a component forming a normally on dual thyristor, which can be turned off by a voltage pulse on the control electrode, including a thyristor, a first depletion MOS...
6172552 FET device for use in solid-state relay  
In an FET device having a pair of input terminals, a pair of output terminals, a plurality of FETs and driving circuits, the driving circuit has such a circuit structure that source electrodes of...
RE36998 Circuit for limiting the output voltage of a power transistor  
A circuit for limiting the output voltage from a power transistor connected in series with a resonant load between a voltage supply and a voltage reference, ground, is disclosed. The circuit...
6034561 Integrated inductive load snubbing device  
A transient suppressor comprises a self-triggered silicon control rectifier (SCR) that forms a drive circuit for an NPN power transistor. The SCR and the NPN power transistor are combined, along...
6031405 ESD protection circuit immune to latch-up during normal operation  
An electrostatic discharge protection circuit immune to latch-up during normal operation is disclosed. The ESD protection circuit is positioned at an IC pad for protecting an internal circuit...
6011424 Integrated birectional transistor switch for large signal voltages  
A birectional transistor switch for large signal voltages comprises a first (T1) and a second (T2) transistor arranged in series, which are supplied with base current under command of a control...
6011420 ESD protection apparatus having floating ESD bus and semiconductor structure  
An apparatus for protecting an integrated circuit against damage from electrostatic discharges (ESD) includes a single ESD bus that is connected to multiple input pads through a respective diode....
5986290 Silicon controlled rectifier with reduced substrate current  
The invention provides a silicon controlled rectifier having an anode and a cathode and including an NPN transistor and a PNP transistor. The NPN transistor has an emitter coupled to the cathode, a...
5929368 Hybrid electronic detonator delay circuit assembly  
An electronic delay circuit (10) for use in a detonator (100) has a switching circuit (20) and a timer circuit (22). Switching circuit (20) controls the flow of a stored charge of electrical energy...
5847593 Voltage discharge circuit for a photovoltaic power source  
A circuit for discharging of a photovoltaic power source has a first and a second terminal and the circuit comprises a discharge circuit which is connected between the first and second terminal of...
5828244 Driving circuit and method for driving a MOS transistor with delayed activation  
A driver circuit delays the turning on of a MOS transistor by utilizing the time-wise pattern of the circuit input signal rather than generating a delay within the circuit itself. A threshold type...
5614771 Extended high voltage SCR switch  
A high voltage switch in which an extended SCR is built in an insulated polysilicon layer for providing a single structure high voltage switch. The high voltage SCR is built by building unit SCRs...
5504451 Gated thyristor and process for its simultaneous fabrication with high- and low-voltage semiconductor devices, integrated circuit containing the same, systems and methods.  
An integrated process is shown for the fabrication of one or more of the following devices: (n-) and (p-) channel low-voltage field-effect logic transistors (556/403); (n-) and (p-) channel...
5218249 High speed, low forward voltage drop, SCR  
A silicon controlled rectifier device including an SCR portion controlled by an input voltage signal to a voltage comparator and having a latching circuit to permit the SCR portion to remain in the...
5159204 Structure and method for preventing latch-up in integrated circuits  
A circuit and method for avoiding latch up in an integrated circuit in which the base-emitter junction of a parasitic bipolar transistor forming part of a parasitic SCR structure is monitored. If...
5086242 Fast turn-off of thyristor structure  
A fast turn-off thyristor including a first active shunt region in the cathode gate region connected electrically to the anode terminal for shunting carriers around the anode gate region in...
5006736 Control circuit for rapid gate discharge  
A single 3-terminal integrated circuit for controlling a switching device provides both control terminal voltage limitation and rapid turn off time. In an alternative embodiment the control circuit...
4956570 Pilot circuit with integrated circuit with preset firing delay for MOS power transistors  
The pilot circuit comprises an R-C network consisting of a condenser inserted between a gate terminal of the MOS transistor and ground and a resistance for charging said condenser. In parallel with...
4945266 Composite semiconductor device  
A static induction thyristor and a power MOSFET are connected is series to construct a composite semiconductor device. The composite semiconductor device is turned ON/OFF in response to signals...
4740723 Semiconductor switch  
A voltage across a resistor of a small value connected in series with the cathode or anode of a thyristor is used as a signal source for overcurrent detection. When an overcurrent is generated, the...
4698655 Overvoltage and overtemperature protection circuit  
An overvoltage and overtemperature protection circuit that includes an output thyristor fabricated in monolithic integrated circuit form is provided. The thyristor comprises a P-type substrate...
4678933 Solid state relay for aerospace applications  
A solid state relay for aerospace applications utilize a transistor circuit for selectively short-circuiting and open-circuiting a secondary winding of a current transformer whose primary winding...
4665459 Method and circuit for dissipating stored inductive energy  
An integrated circuit comprising a series pass transistor for sourcing current from the positive side of a battery to an inductive load includes integrated circuitry for providing a direct current...
4665316 Photovoltaic relay switch  
A photovoltaic relay which includes a unique pull down circuit for rapidly turning off the relays field effect transistor(s). The pull down circuit discharges the gate-to-source capacitance of the...
4654543 Thyristor with "on" protective circuit and darlington output stage  
A thyristor is preferably fabricated as a single thyristor device in an integrated circuit. The thyristor is made conductive by applying an ordinary gating voltage to the gate thereof. However, the...
4614897 Switching circuit  
An electronic switch is disclosed that uses two complementary regenerative latches connected in a push-pull arrangement. The latches are interconnected so that when either latch turns on, the other...
4551643 Power switching circuitry  
A four layer insulated gate controlled semiconductor device has a range of anode-cathode currents over which gate control potentials will extinguish such anode-cathode current. Coupling circuitry...
4530023 Solid state interrupt circuit  
A pair of PNPN thyristors are used to provide a solid state fuze for circuit protection. One of the pair of thyristors is self-biased on and provides normal current flow. The other thyristor turns...
4270101 Relaxation oscillator having switched current source  
Within a relaxation oscillator of the type having a capacitor that is recurrently charged from a current source and then discharged through a silicon controlled rectifier upon reaching a threshold...
4267467 Timer circuit  
The maximum voltage stored in a timer storage capacitor during charging is limited to a fixed level independent of battery voltage by the junction drops of a plurality of forward biased solid state...
4223281 SCR Relaxation oscillator with current amplifier in its gate circuit  
Within a relaxation oscillator of the type having a capacitor that is recurrently being charged from a current source and then discharged through a silicon controlled rectifier upon reaching a...
4223280 Relaxation oscillator including an SCR and having switch means for interrupting current flow therethrough  
Within a relaxation oscillator of the type having a capacitor that is recurrently being charged from a current source and discharged through a silicon controlled rectifier upon reaching a voltage...
4188548 Semiconductor switching circuit  
A semiconductor switching circuit comprising a semiconductor element having an equivalent four-layer structure of a PNPN conductivity type formed by connecting the collector and the base of an NPN...
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...
4125787 Semiconductor switch circuit  
A semiconductor switch circuit comprises a PNPN switch with a PNPN semiconductor four-layered structure equivalently including first and second transistors and a gate terminal, a load current...
4047055 Line control unit for teleprinters  
In a line control unit for teleprinters, a pair of isolating circuits are disposed between the line transistors and the generating circuit, so that there is no electrical connection between the...
4041332 Semiconductor switch device  
A semiconductor switch device comprising a PNPN switch having an equivalent four-layer structure, a transistor, two impedance elements and a capacitive element, wherein the transistor and one of...
T957008 Switching circuit with accurate current threshold  
a threshold current gate provides a diversion path for substantially all input current lower than a threshold value applied to the trigger electrode of a switch, such as a semiconductor controlled...
4015143 Semiconductor switch  
A semiconductor switch large in dv/dt bearing capacity regardless of the anode or cathode potential, high in breakdown voltage, capable of being closed with a small control current, and easy to be...
3932769 Circuit arrangement for producing a defined logic condition, particularly for the monitoring signal output in data processing equipment  
A circuit arrangement in a line which transfers a condition by means of a semiconductor switching arrangement which produces a logic condition associated with monitored data processing equipment....
3919489 Thyristor circuitry for providing automatic number identification services  
Thyristor circuitry is disclosed for passing high voltage d.c. signals identifying a called non-working telephone directory number which number is automatically forwarded to an intercept operator....
3885171 Thyristor element and circuit  
The radio noise generated by a thyristor circuit is reduced by extending the turn-on time. A condenser is connected between the gate and cathode electrodes of the thyristor, which is so constructed...
3787739 COUPLER CIRCUIT FOR TELEPHONE NETWORKS AND THE LIKE  
The present invention relates to a coupler circuit for insertion between a power supply circuit and a subscriber circuit connected thereto -- particularly between a telephone line and a telephone...
Matches 1 - 50 out of 67 1 2 >