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Superconductive Circuits

IP.com Disclosure Number: IPCOM000097148D
Original Publication Date: 1962-Jun-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Sanborn, JL: AUTHOR

Abstract

The trigger (left drawing) comprises four control cryotrons 1... 4 which require a control current sum of 1. 5 units to have their gates G resistive. The normal current through any control conductor C is one unit and currents through adjacent control conductors aid or oppose each other as indicated by the arrows.

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Superconductive Circuits

The trigger (left drawing) comprises four control cryotrons 1... 4 which require a control current sum of 1. 5 units to have their gates G resistive. The normal current through any control conductor C is one unit and currents through adjacent control conductors aid or oppose each other as indicated by the arrows.

A main current and an auxiliary current each take one of two paths I(1) or I(2) respectively I(3) or I(4). Each path of the main current controls one cryotron gate in one path of the auxiliary current. Each path of the auxiliary current controls one cryotron gate in one path of the main current. The auxiliary path cryotron gates are further controlled by a bias current I(B). All cryotron gates can be controlled by a trigger pulse current I(T).

Assuming currents I(2) and I(4) a pulse I(T) changes the main current to I(1). After the end of I(T) the auxiliary current changes to I(3). The next trigger pulse first changes I(1) to I(2) and afterwards I(3) to I(4)

In the shift register (right drawing), the cryotron gates in the main paths 1 and 0 of a stage are controlled by auxiliary currents in two paths 1 and 0 from a preceding stage. The main currents control cryotron gates in the auxiliary paths which extend to the next stage. The trigger pulse first sets a second stage in the condition of a first stage. This occurs before the auxiliary current in the first stage takes the new condition pertaining to the new state of the first stag...