Superconductive shift register utilizing Josephson tunnelling de

Details Superconductive shift register utilizing Josephson tunnelling de Superconductive shift register utilizing Josephson tunnelling de

1975-06-16

1976-06-08

Fears, Terrell W.

Communications: electrical

Digital comparator systems

307306, G11C 1144

Patent

active

RE0288535

ABSTRACT:
A [two-phase] superconductive shift register using Josephson tunnelling devices is provided wherein a plurality of shift register stages each includes a first and second branch in parallel to which a DC current is supplied. A Josephson tunnelling device is located in each branch which operates in its no voltage state when the DC current is applied thereto. A first and second input means is provided for switching one of the Josephson tunnelling devices in accordance with an input to cause the input current to flow through the other branch. A first and second [coupling] control means are located between the stages of the shift register, the first [coupling] control means coupling the first branch circuits of successive stages and the second [coupling] control means coupling second branch circuits of successive stages. The [coupling] control means are [energized] effective in response to phase time pulses and current flow in the preceding stage causing the Josephson device in the next stage to switch to its finite voltage stage thereby causing the current to flow in the opposite branch in the next stage.

REFERENCES:
patent: 3281609 (1966-10-01), Rowell
patent: 3626391 (1971-12-01), Anaker

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