Logic coincidence gate and logic sequential circuits using said

Details Logic coincidence gate and logic sequential circuits using said Logic coincidence gate and logic sequential circuits using said

1985-12-11

1987-10-27

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307446, 307450, 307475, H03K 19017, H03K 1902, H03K 19094, H03K 19092

Patent

active

047032049

ABSTRACT:
The invention relates to a coincidence gate, whose output only changes state if the inputs are of the same logic level. It has two parallel-connected NOT circuits, each constituted by a transistor, whose source is at earth and the drain supplied by a resistor, the gates constituting the inputs of the gate. The two resistors are identical saturated resistors and the first NOT circuit is supplied from a fixed voltage, whereas the second NOT circuit is supplied across a Schottky diode connected in the forward direction from the point common to the first saturated resistor and to the drain of the first transistor. The point common to the Schottky diode and the second saturated resistor constitutes the output of the coincidence gate. Application to sequential logic circuits.

REFERENCES:
patent: 3664118 (1972-05-01), Walton
patent: 3832574 (1974-08-01), Leehan
patent: 3943379 (1976-03-01), McGuffin
patent: 4450369 (1984-05-01), Schuermeyer
Van Tuyl et al., "High-Speed GaAs MSI", Hewlett-Packard Laboratories ISSCC76/Wednesday, 2/18/76.
Eden et al., "The Prospects for Ultrahigh-Speed VLSI GaAs Digital Logic, IEEE Journal, vol. SC-14, No. 2, 4/79.

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