Track and hold circuit with continuously suppressed Josephson ef

Details Track and hold circuit with continuously suppressed Josephson ef Track and hold circuit with continuously suppressed Josephson ef

1992-08-17

1993-12-21

Pellinen, A. D.

Coded data generation or conversion

Analog to or from digital conversion

With particular solid state devices

341122, H03M 112

Patent

active

052724808

ABSTRACT:
A track and hold circuit for use with an analog signal quantizer, comprising a multiple of four superconductor-insulator-superconductor (SIS) junctions arranged in a bridge. A storage inductance is connected to opposite nodes of the bridge, with an analog signal input being orthogonally injected into the bridge. The SIS junctions are magnetically suppressed from reaching a superconducting, zero-voltage state, limiting switching of the SIS junctions between a subgap voltage, high differential resistive behavior and a low differential resistive behavior exhibited when a gap voltage is attained. Preferably, each SIS junction includes a magnet that suppresses the superconductivity. Alternatively, a control wire may be used to provide a magnetic field to suppress superconductivity.

REFERENCES:
patent: 3764905 (1973-10-01), Zappe
patent: 3936809 (1976-02-01), Zappe
patent: 3983419 (1976-09-01), Fang
patent: 4879488 (1989-11-01), Silver
patent: 4940983 (1990-07-01), Jones et al.
patent: 4956642 (1990-09-01), Harada
patent: 4983971 (1991-01-01), Przybysz et al.
patent: 5019818 (1991-05-01), Lee
patent: 5099152 (1992-03-01), Suzuki
Go, Diane et al., "A Superconducting Analog Track-and-Hold Circuit," IEEE Transactions on Electron Devices., vol. 35, No. 4, Apr. 1988.

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