Josephson-junction logic circuit

Details Josephson-junction logic circuit Josephson-junction logic circuit

1986-09-22

1987-12-15

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307471, 307476, 307306, 357 5, H03K 19195

Patent

active

047135620

ABSTRACT:
A Josephson-junction logic circuit comprises at least one Josephson-junction logic gate which has a variable threshold-type superconductive quantum interference element. The Josephson-junction logic gate comprises a superconductive inductance loop, and at least two Josephson junctions included in the superconductive loop. At least two current-injection lines connected to the superconductive loop and at least one magnetically coupled line are provided. The magnetically coupled line is placed so as to be magnetically coupled to the inductance. Because of this construction, the number of inputs can be increased. Also, various logical functions can be obtained. Further, various logic circuits can be formed by simply changing the photomask for the wiring between the gates.

REFERENCES:
H. H. Zappe, "Josephson Quantum Interference Computer Devices", IEEE Transactions on Magnetics, vol. MAG-13, No. 1, Jan. 1977, pp. 41-47.

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