Browse Prior Art Database

Cryogenic Input Output Devices

IP.com Disclosure Number: IPCOM000098495D
Original Publication Date: 1960-Nov-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Petersen, HE: AUTHOR

Abstract

This is a method by which information is read in and out of a cryogenic computer.

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Cryogenic Input Output Devices

This is a method by which information is read in and out of a cryogenic computer.

On the left, a cryotron gate 10 is provided on the vacuum side of a bulkhead 12, separating the vacuum from the cryotron computer. To read information into the computer, the element 10 is connected to a single shot type circuit (not shown) and a pulse type energy source such as an electron beam is positioned to impinge upon the element 10. The first pulse of a train of pulses from the electron beam causes the element 10 to change from a superconductive state to a resistive state. Upon termination of this pulse, the element 10 automatically switches back to the superconductive state and, thus, information in the form of a train of pulses is provided for the computer.

The state of element 10 is read by employing reflection techniques as shown at the right through electron mirror action. If there is no current flowing in the element 10, then the reflection is along the path b. If current of one polarity is flowing through element 10, then the reflection is along path a. If current of opposite polarity is flowing through element 10, then the reflection is along path
c.

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