Electronic digital logic circuitry – Function of and – or – nand – nor – or not – Field-effect transistor
Patent
1997-04-23
1999-08-17
Tokar, Michael
Electronic digital logic circuitry
Function of and, or, nand, nor, or not
Field-effect transistor
326 55, 326 49, H03K 19094, H03K 1920
Patent
active
059398990
ABSTRACT:
Logic devices of the present invention have one or more MOSFETs that are configured to operate in logic circuits, where voltages applied to the source and drain of each MOSFET are treated as logic inputs to the circuit and the resulting substrate current is treated as the logic output of the circuit. In one implementation, a MOSFET is configured in a circuit to operate as an XOR gate where a load resistor between the substrate and ground converts the substrate current into an output voltage. A sample-and-hold circuit samples and holds the output voltage to isolate the XOR gate thereby allowing DC power dissipation to be reduced. In another implementation, three MOSFETs are configured to operate as an "ORNAND" logic device that performs the logical addition of the OR function and the NAND function.
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Frommer Aviv
Pinto Mark R.
Chang Daniel D.
Lucent Technologies - Inc.
Tokar Michael
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