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AND Circuit with Josephson Junctions

IP.com Disclosure Number: IPCOM000084711D
Original Publication Date: 1975-Dec-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 23K

Publishing Venue

IBM

Related People

Wolf, P: AUTHOR

Abstract

An AND circuit consists of n parallel Josephson junctions with a bias current I(B) being supplied via a common resistor R(B). The junctions are designed such that their maximum Josephson current is at least slightly larger than the bias current, so that the junctions are in their superconducting state in the absence of any control signals (A, B).

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AND Circuit with Josephson Junctions

An AND circuit consists of n parallel Josephson junctions with a bias current I(B) being supplied via a common resistor R(B). The junctions are designed such that their maximum Josephson current is at least slightly larger than the bias current, so that the junctions are in their superconducting state in the absence of any control signals (A, B).

The circuit remains in that state until the last one of the junctions has seen its control current, then the circuit transfers current into a local resistor R(L), thereby controlling an external junction J(E). Resistor R(L) has a value to guarantee latching of the circuit.

This circuit can operate with rectangular junctions as well as with 3-or 4- junction interferometers.

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