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5942928 Multivibrator circuit  
An emitter-coupled multivibrator circuit comprises two transistors (Q1, Q2), between which a positive feedback is provided by connecting each transistor base via buffer transistors (Q3, Q4) to the...
5895979 Power distribution network incorporating a voltage support transformer and process of use  
A power distribution network including a voltage support transformer is disclosed which uses the fault current from a line of the power distribution network in which a fault condition exists to...
5796279 DC application circuit with suppressed DC magnetization  
To a current mirror circuit or a voltage regulator are coupled a primary winding of a transformer (T3 or T4) or a choke coil (L2 or L3). Transistors (Q1 or Q2) making up a current mirror circuit...
5736884 Device for generating a control signal dependent on a variable resistance value and apparatus comprising such device  
A device for generating a control signal voltage which is dependent on a resistance value of a variable resistor (8) includes a transformer (24) having a first winding (22) which is in series with...
5650748 Ultra-stable gain circuit  
A highly stable linear integrated circuit amplifier (11) is incorporated in a circuit (10) employing transformer (18) feedback providing thermal gain stability determined solely by the transformer...
5528180 Steerable pulse phase controller  
An impedance-steerable circuit for an industrial phase controller inserts precise steerable trigger pulses in the sine and cosine excursions of a sine wave of high-energy capacitive and related...
5483156 Magnetic field alternation detecting apparatus  
A magnetic field alternation detecting apparatus includes a magnetic member sensor enclosed in a case and having a core (i.e., a yoke) to which a magnet is attached and around which a coil is...
5469098 Isolated gate drive  
A drive circuit for use in UPS and like devices, designed to derive high-level switching signals from low-level logic signals. The drive circuit has an input circuit which drives the primary of an...
5457416 Electrooptic Q-switching drive circuit for Porro prism laser resonator  
A Q-switching drive circuit utilizing a magnetization curve characteristic of a saturation reactor, thereby capable of achieving a semipermanent use life, a rapid switching into a Q-switching...
5434527 Gate drive circuit  
A circuit includes a high voltage energy source, a power transistor having a drain connected to the energy source and a source connected to a load, and a first capacitor connected between the...
5416364 Direct current to direct current galvanic isolator  
A signal isolation apparatus has a first transformer with a primary winding tap receiving an input signal and another primary winding tap receiving a first oscillating signal. A second transformer...
5414309 Circuit for applying direct current to winding  
A circuit for applying a direct current to a winding. One end of a primary winding of a transformer is connected to a first transistor via a resistor. The other end of the primary winding is...
5331213 Pulse transmission circuit with undershoot eliminating circuitry  
An undershoot eliminating circuit is provided between a pulse transformer of a pulse transmitter coupled to a transmission line and a pulse transformer driving circuit for driving the pulse...
5331288 Railroad rail signal receiver having frequency conversion and a resonant tuned transformer secondary  
A receiver for use in receipt of signals on railroad rails which converts the rail signal to a higher frequency and feeds the higher frequency signal into an input transformer. The secondary of...
5321325 Single input push-pull circuit  
The invention relates to a modified electronic amplifier of the push/pull configuration. The difference being that only one signal (as apposed to two signals 180 degrees out of phase) is needed to...
5302862 Efficient transformer-coupled gate driver circuit for power FET's  
A gate driver circuit for a converter which requires an approximately 50% duty cycle to drive two power switching devices (e.g., in many interleaved, push-pull and bridge converters) includes a...
5283529 Oscillation maintenance circuit  
A circuit arrangement is described for generating pulses for maintaining the oscillations of a resonance circuit after termination of an outside stimulation of the oscillations by means of an HF...
5264736 High frequency resonant gate drive for a power MOSFET  
An efficient power MOSFET resonant gate drive circuit having a large coupled inductor between and in series with two switching transistors. The inductor prevents cross-conduction from the power...
5235224 Current detecting circuit using pulse transformer  
A detecting circuit is provided with at least one transformer, in which a first transformer is connected at its primary winding to an input power source and has two windings at its output portion...
5187384 Method and circuit configuration for triggering a semiconductor switch through the use of an inductive transformer  
A method for triggering a semiconductor switch with an inductive transformer having a primary side and having a secondary side connected to the semiconductor switch to be triggered includes...
5023471 Testable input/output circuit for a load decoupled by a transformer  
An input/output circuit for performing tests prior to controlling an electrical load (2) which is decoupled by a transformer (5). An input (E) thereto acts on a first switching member (6)...
4899065 Pre-drive circuit  
A pre-drive circuit performs on/off control of a switching transistor element (Q1) through a pulse transformer (T) having two primary windings (P1, P2). Switching elements (Q2, Q3) are...
4812770 Saturable reactor current pulse generator  
Method and apparatus for generating a current pulse of substantially constant amplitude and variable pulse width. A first energy source applied through a saturable device (e.g., a saturable...
4713553 Fast power-fail detector for power supplies with energy hysteresis  
A system for rapidly detecting power disturbances with ferroresonant transformers having a decay profile comprising the steps of rectifying a power signal; comparing the rectified signal against a...
4623850 Vital code generating circuit  
A vital low frequency code generating circuit having a pair of complementary unijunction transistor relaxation oscillators for producing coincidental pulses in the absence of any failure; and a...
4572973 AC Current detection circuit for a rotor driving supply source of a rotating anode X-ray tube  
An AC current detection circuit is intended to detect whether an AC induction current for the rotor of the rotating anode X-ray tube flows or not. A current transformer is employed in the rotor...
4567379 Parallel current sharing system  
A circuit including a plurality of transistors in parallel for dividing load current substantially equally between the transistors including a transformer coupled to each transistor, with the...
4384254 Oscillator/driver circuit for fluxgate magnetometer  
A low power expenditure oscillator/driver circuit including a transistor drive and control windings connected thereto and being operatively wound on a magnetic core suitable for use in a fluxgate...
4298838 Transformer device  
A transformer device comprises a saturable magnetic core having control and controlled windings, the saturable magnetic core being controlled in a feedback mode through switch means such as...
4121118 Bipolar signal generating apparatus  
A bipolar signal generating apparatus for generating a bipolar signal having positive and negative polarities and comprising a switch means for connecting two terminals of a primary winding of a...
4068135 Signal isolating and sampling circuit  
A signal isolating and sampling circuit using a transformer to isolate a signal input circuit from a signal output circuit. Signal sampling switches are used in the input and output circuits to...
4058743 Pulse generating circuit  
A pulse is generated in an output transformer and this pulse is used to provide a spark across a spark gap for the purpose of igniting any gas/air mixture present. The circuit operates from a 1.5...
4055776 CCD differential current apparatus  
An inductively coupled current apparatus for differential tap currents used n conjunction with charge coupled devices (CCDs) permits the current differences flowing in tapped clock lines of charge...
4052623 Isolated semiconductor gate control circuit  
A circuit for the generation or development of a gating signal for a semiconductor device which is isolated from the circuit of the device itself is comprised of a pulse generating section which...
4034239 Capacitance memories operated with intermittently-energized integrated circuits  
Capacitance memories operated with intermittently-energized monolithic integrated circuits tend to lose information during periods between the spaced intervals the integrated-circuits are...
4034237 Drive circuit for ultrasonic level gauge  
An AC drive circuit for exciting the transducer of an ultrasonic level gauge. The circuit includes a gate-controlled astable multivibrator that generates pulses of constant amplitude and constant...
4028559 Regenerative repeater circuit arrangement for use in digital data transmission systems  
Bipolar digital repeaters are commonly fed with a constant d.c. supply but with the known circuit, the mode of use of transformer-coupled output stage places a limitation on the voltage-amplitude...
4021681 Resonant sensor using a phase locked loop detector  
A speed sensor circuit for providing a speed signal representative of the speed of a vehicle comprises a resonant tank circuit whose resonant frequency is modulated in accordance with the speed of...
3959669 Control apparatus for supplying operating potentials  
There is disclosed a system for supplying operating potentials which is particularly useful with load devices wherein at least two transversely oriented conductors are dielectrically isolated from...
3958137 Thyristor circuit  
A thyristor circuit for generating a pulse current is provided having a by-pass circuit of a predetermined impedance which is placed in parallel to a saturable reactor. In this manner a small...
3906301 Computerized lighting system  
An apparatus for converting d.c. current to a.c. current has a multivibrator receiving a direct current operating potential. A differentiator has an amplifier connected to the multivibrator. It...
3898485 DC voltage regenerating transformer coupling device  
A high speed and highly accurate transformer coupler comprising a pulse transformer to the input winding of which a DC voltage source is connected in which when a DC voltage is needed to be...
3860914 DIGITAL DATA RECORDER  
A digital data recorder is described having inherent circuitry characteristics that will re-establish the recorded data state previously established just prior to a power failure upon the return...
3828208 DRIVER CIRCUIT USING DIODES TO CONTROL THE MINORITY CARRIER STORAGE EFFECT IN SWITCHED TRANSISTORS  
An improved driver circuit for a pair of switching transistors in a DC-DC converter or a DC-AC inverter is shown. The illustrated circuit includes a switchable constant current source coupled...
3824407 DIRECT CURRENT SIGNAL ISOLATOR PROVIDING A CLOSE REPLICA OF WAVE SHAPE  
A circuit providing information regarding the magnitude and polarity of signals in an electrical system. The signals may be A.C., D.C., asymmetrical, or of a pulse nature. A flip-flop drives a...
3793532 MULTIPLE PULSE GENERATOR  
A mulitple pulse generator comprises a plurality of axially straight, prestretched wire segments uniformly twisted helically and enclosed in a dielectric body to form a cylindrical core. A wire...
3772529 PROGRAMMABLE UNIJUNCTION FENCE CHARGER  
A portable fence charger which comprises a relaxation oscillator having a programmable unijunction transistor for producing repetitive pulses, circuitry for amplifying and applying said pulses to...
3763384 BISTABLE AND CONTROLLABLE FLIP-FLOP-CIRCUIT ARRANGEMENT  
A bistable and stability controllable flip-flop circuit arrangement comprising two amplifiers each having an output and an input. Means define respective direct-current coupling paths for mutually...
3743858 SHIFT REGISTER  
A shift register is comprised of a plurality of bistable devices with the output of a given bistable device being coupled to the input of the following bistable device by way of a memory circuit...
3735390 METHOD AND CIRCUIT FOR CONVERTING AN ANALOG SIGNAL INTO A SIMULTANEOUS DIGITAL SIGNAL  
The present invention relates to a method for converting an analog signal into a simultaneous digital signal and to a circuit for carrying out the method. Therefore, the complete digital...

Matches 1 - 50 out of 304 1 2 3 4 5 6 7 >