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| Number | Title | Issue Date |
| 7239235 | Non-contact sensor idle validation switch A switch is disclosed having first and second switch elements each configured to provide power to a sensor when in one state and configured to switch to a second state and provide positional information, for example. The sensor configured to effect the first and sec... | 07/03/2007 |
| 6163201 | Circuit for supplying a load with a direct voltage In a circuit for supplying a load with a direct voltage, a diode is connected in a current path for supplying the load, a step-up converter is connected in the current paths parallel with the diode, and a control unit drives the step-up converter accordin... | 12/19/2000 |
| 5781059 | Driver circuit for semiconductor test system A driver circuit for a semiconductor test system generates test signals having predetermined voltage levels without being affected by stray capacitances. The driver circuit includes: a buffer amplifier for supplying test signals having predetermined volta... | 07/14/1998 |
| 5745003 | Driver circuits for IC tester A multi-level driver circuit comprises: (a) an output buffer; (b) a first switch for applying a first analog level to the output buffer when in a closed state; (c) a second switch for applying a second analog level to the output buffer when in a closed st... | 04/28/1998 |
| 5699001 | Driver circuit for semiconductor test system A driver circuit for a semiconductor test system significantly reduces power consumption and limits current flowing from a power-supply. The driver circuit provides a test signal having predetermined voltage levels to a semiconductor test under test by sw... | 12/16/1997 |
| 4947126 | Ground fault current rectification and measuring circuit An apparatus for monitoring alternating currents and providing a signal representative of the current. The signals are rectified by a modified full wave rectrifier to provide a power source, a positive signal associated with the positive range of the curr... | 08/07/1990 |
| 4859875 | Optocoupler for power FET A power FET is driven by a photodiode chain across a switch, which has two FETs (5, 6) arranged in series. Upon illumination the first FET (5) is driven to be conducting, which permits current to flow from a capacitor (C) connected to a fixed voltage into... | 08/22/1989 |
| 4543495 | Diode bridge switching circuit with high attenuation A switching circuit is suitable for pulse modulating a high frequency carrier signal. The switching circuit provides little attenuation of the carrier signal while it is in its conductive state, but provides very high electrical isolation while in its non... | 09/24/1985 |
| 4535203 | Bridge rectifier circuit A bridge rectifier circuit comprises a bridge of switching transistors 1 to 4 having their control terminals connected to switch the transistors to provide either full wave rectification of an a.c. input voltage or polarity correction of a d.c. input volt... | 08/13/1985 |
| 4482818 | Universal field convertible 3-wire switch A universal 3-wire switch module is provided for normally open and/or normally closed load control modes. The universal switch module is field convertible from P type DC to N type DC to P type AC to N type AC configurations as programmed by installation w... | 11/13/1984 |
| 4482817 | Bilateral electronic switch A bilateral, low loss, wide band, switching circuit controls the transfer of a signal between two terminals. The balance points of a bilateral current gate connect to the terminals. A rectifier forward-biases the bilateral current gate when a controllable... | 11/13/1984 |
| 4480197 | Multiple load switching circuit The specification discloses an electronic circuit which allows selective energization of electrical loads from a remote location by successive momentary interruptions of a common power source. In one embodiment, a ceiling fan and an attached light fixture are ... | 10/30/1984 |
| 4451703 | All electronic interface for telephony system A line circuit for connecting a subscriber line to a telephony system that avoids the use of electro-mechanical elements such as relays. A bridge circuit includes a bilateral current gate in each of the tip and ring lines that can couple or inhibit signal... | 05/29/1984 |
| 4437096 | Concentrator circuit incorporating solid state bilateral bridge arrangement A bilateral, low loss, wide band, concentrator circuit selectively controls the transfer of a signal between one of a plurality of first terminals and a single, second terminal. The balance points of each of a plurality of bilateral current gates connect ... | 03/13/1984 |
| 4292550 | Gate control circuit with capacitor for field controlled thyristor The positive terminal of a series circuit consisting of two capacitors is connected with the cathode of a field controlled thyristor through a resistor and a transistor and the negative terminal thereof is connected with the gate of the field controlled t... | 09/29/1981 |
| 4150256 | Digital multiplexer incorporating high-speed analog sampling gates Multiplexers and demultiplexers including sampling gates in the form of diode bridges are disclosed. Plural-input gates, each formed from two or more diode bridges with two adjoining arms in common, are utilized in a multiplexer designed to synthesize a m... | 04/17/1979 |
| 4112374 | Doubly balanced mixer with optimized dynamic range A circuit for mixing first and second rf signals to produce an output signal containing a beat frequency comprises a pair of switches each of which has a four diode bridge controlled by the first rf signal. The first rf signal is coupled to a balanced cur... | 09/05/1978 |
