Fail-safe and gate circuit

Details Fail-safe and gate circuit Fail-safe and gate circuit

1979-04-20

1982-03-16

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307510, 331113R, H03K 19007, H03K 19082, H03K 1920

Patent

active

043203159

ABSTRACT:
A fail-safe AND logic circuit including a free-running multivibrator and a pair of voltage reference networks. The multivibrator includes a pair of common emitter transistor amplifiers. The transistor amplifiers are separately biased and powered by an individual one of a pair of voltage reference networks so that a.c. oscillations are produced by the multivibrator when a separate negative-going pulse coincidentally appears on both of the pairs of voltage reference networks.

REFERENCES:
patent: 3264579 (1966-08-01), Marcus
patent: 3705991 (1972-12-01), Hobo
patent: 3747014 (1973-07-01), Darrow
patent: 3995173 (1976-11-01), Sibley

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