Josephson logic circuit

Details Josephson logic circuit Josephson logic circuit

1987-03-20

1995-10-03

Hudspeth, David R.

Electronic digital logic circuitry

Superconductor

Tunneling device

326 35, 327367, H03K 19195

Patent

active

054555191

ABSTRACT:
A Josephson logic circuit includes a Josephson element inserted between an input terminal and a reference electric potential such as ground, a resistor inserted between the input terminal and an input of the next stage of the Josephson circuit, and a current source which supplies an offset current to the Josephson element. By adjusting the offset current, the Josephson logic circuit can be operated as an AND circuit, an OR circuit, or a majority logic circuit having a high input sensitivity.

REFERENCES:
patent: 4117354 (1978-09-01), Gheewala
patent: 4313066 (1982-01-01), Gheewala
patent: 4371796 (1983-02-01), Takada
patent: 4413196 (1983-11-01), Josephs et al.
patent: 4482821 (1984-11-01), Houkawa et al.
IEEE Transactions on Electron Devices, "Josephson-logic Devices and Circuits", Gheewala, vol. ED-27, No. 10, Oct. 1980, pp. 1857-1869.
IBM Technical Disclosure Bulletin, "Compact Three-Terminal Josephson Switch", Faris et al., vol. 24, No. 3, Aug. 1981, pp. 1545-1546.
IEEE Transactions on Electron Devices, "A Three-Josephson Junction Direct Coupled Isolation Device", Wang et al., vol. ED-29, No. 3, Mar. 1982, pp. 414-417.
Applied Physics Letters, "Resistor Coupled Josephson Logic", Sone et al., vol. 40, No. 8, Apr. 15, 1982, pp. 741-744.

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