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Dimension Controlled Nondestructive Readout Chain Storage Element

IP.com Disclosure Number: IPCOM000093702D
Original Publication Date: 1966-Jan-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Macario, RCV: AUTHOR

Abstract

Nondestructive readout capability of a chain storage element is provided by a configuration which defines a storage area of major dimensions and a nondestructive readout area of minor dimensions distributed about a central aperture.

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Dimension Controlled Nondestructive Readout Chain Storage Element

Nondestructive readout capability of a chain storage element is provided by a configuration which defines a storage area of major dimensions and a nondestructive readout area of minor dimensions distributed about a central aperture.

The dimensions of the two areas are such that the nondestructive readout (NDR) area is affected by a word current Iwn which is too small to affect the larger storage area. After the readout of the NDR area, the storage area is sufficiency powerful to re-establish the original data magnetization in the NDR area.

The element is set to a data value, which may be either of binary values 0 or 1, by the combination of a threshold reducing field developed by word current Iw and a bit defining field IB. The element retains a magnetic orientation about the aperture depending upon the direction of bit current. As shown, the element is oriented counter-clockwise for the 1 value and clockwise for the 0.

In the form shown at the left, a storage leg is longer and wider than the nondestructive readout leg. After readout of the NDR leg, the storage leg re- establishes the original data value.

In the form shown at the right, the NDR areas are centrally located within the storage legs, but are both shorter and thinner. After readout of the NDR legs, the storage legs re-establish the original data value. Ferrite keepers at the ends provide a flux closure which enhances operation.

Dimensio...