Josephson self gating And circuit and latch circuit

Details Josephson self gating And circuit and latch circuit Josephson self gating And circuit and latch circuit

1977-11-30

1979-01-23

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307212, 307306, H03K 338, H03K 19195

Patent

active

041362900

ABSTRACT:
A Josephson Self Gating And circuit which is powered by pulsed or clipped alternating current and provides true and complement outputs in response to true and complement inputs is disclosed. Inputs applied during the duration of the applied pulsed power or clipped alternating current are delivered to outputs which are maintained in that state in spite of a change of input within the given pulse duration. In one embodiment, the presence of an output signal interrupts a current path which, in turn, disables a pair of AND gates. These gates, even though the input to them changes, can provide no other output until the applied power falls to zero resetting the pair of AND gates which are latching in character. In another embodiment, current paths of one AND gate are cross-coupled with a current path of another AND gate. The interruption of current in a serially disposed Josephson device in one or the other of the current paths disables one or the other of the pair of AND gates preventing a change in outputs until the next cycle of applied pulsed or alternating current power. A latch circuit incorporating a pair of AND gates, a flip-flop and a Self Gating And circuit is also disclosed. The latch permits an input different from a previously applied input to the flip-flop to change the state of the flip-flop without changing the output of the Self Gating And during the application of a cycle of pulsed or alternating current power. The changed input to the flip-flop appears at the output of the Self Gating And circuit during the next cycle of applied pulsed or alternating current power.

REFERENCES:
patent: 3953749 (1976-04-01), Baechtold et al.

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