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Browse Prior Art Database

Magnetic Core Memory

IP.com Disclosure Number: IPCOM000098074D
Original Publication Date: 1961-Dec-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Anderson, JL: AUTHOR

Abstract

A matrix of magnetic core elements 1 is mounted within cathode ray tube 2. Reading and writing functions are performed by a controlled electron beam 3. The memory consists of two conductive plates 4 and 5 which are connected by lines 6 and 7 through switch 8 to potential source 9.

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Magnetic Core Memory

A matrix of magnetic core elements 1 is mounted within cathode ray tube 2. Reading and writing functions are performed by a controlled electron beam 3. The memory consists of two conductive plates 4 and 5 which are connected by lines 6 and 7 through switch 8 to potential source 9.

Plate 5 has protuberances 10 on which cores 1 are mounted. Protuberances 10 are aligned with and extend toward associated apertures 11 in plate 4. A small air gap 12 exists between each protuberance and plate 4.

If a voltage below breakdown voltage is applied across plates 4 and 5, no current flow's. However, with the same voltage applied, the passage of electron beam 3 through an aperture 11 and through a protuberance 10 increases the conductivity of the vacuum. This initiates current flow between plates 4 and 5 to switch the selected core 1. Switching of core 1 induces a signal on windings 13 and 14.

The cores are reset by operating switch 8 to reverse the applied potential. Current then flows in the opposite direction, when the electron beam 3 is next applied. Only one core is switched at a time so that the noise level is low and a small sense signal is adequate. As a result, small cores can be used with lower heat generation and very fast switching.

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