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Defining a Superconducting Current Path

IP.com Disclosure Number: IPCOM000097150D
Original Publication Date: 1962-Jun-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Brennemann, AE: AUTHOR

Abstract

Bias current flow through a control element positioned above a superconducting sheet or film defines superconducting paths through the film. This is effected by maintaining selected regions of the film resistive.

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Defining a Superconducting Current Path

Bias current flow through a control element positioned above a superconducting sheet or film defines superconducting paths through the film. This is effected by maintaining selected regions of the film resistive.

In this superconductive bistable circuit, sheet 1 is effectively divided into a pair of superconducting paths 2 and 3 by bias current flow through control 4. The current has a magnitude sufficient to generate a magnetic field which quenches superconductivity in the central region 5 of sheet 1. Paths 2 and 3 are electrically connected in parallel by superconductive strip 6. This remains superconducting in the presence of the biasing magnetic field generated by control 4. Controls 7 and 8 are selectively energized to direct the input current to either output terminal 9 or 10. Alternatively, by connecting terminals 9 and 10 by a superconductive strip, similar to strip 6, a superconducting persistent current loop is provided.

Control 4 is relatively narrow and requires very little current to drive region 5 resistive. By employing a number of bias controls and a single superconducting sheet, an increased packing density for superconductive circuits is obtained.

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