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A Non-coincident Core Reading Method

IP.com Disclosure Number: IPCOM000098257D
Original Publication Date: 1960-Jun-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 25K

Publishing Venue

IBM

Related People

Kiseda, JR: AUTHOR

Abstract

A magnetic core memory, provided with the conventionally disposed X, Y and sense windings, can be operated by interlaced non coincident current impulses applied alternately to the X and Y drive lines. The amplitude of the drive pulses is substantially equal to the full select current necessary to switch a core, but the duration is so short that the integrated energy of any one pulse is insufficient to switch.

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A Non-coincident Core Reading Method

A magnetic core memory, provided with the conventionally disposed X, Y and sense windings, can be operated by interlaced non coincident current impulses applied alternately to the X and Y drive lines. The amplitude of the drive pulses is substantially equal to the full select current necessary to switch a core, but the duration is so short that the integrated energy of any one pulse is insufficient to switch.

The pulse timing is so adjusted that the non selected cores can relax between alternate drive pulses, but the selected cores cannot relax between adjacently occurring pulses. Thus, the incremental energy buildup within the selected cores by a burst of alternately occurring X and Y drive pulses switches the selected cores to provide the requisite response in the sense windings coupled to them.

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