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Browse Prior Art Database

Time Sharing for a Magnetic Memory

IP.com Disclosure Number: IPCOM000098617D
Original Publication Date: 1959-Jun-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 72K

Publishing Venue

IBM

Related People

VanMechelen, KW: AUTHOR

Abstract

Magnetic memory systems for digital information often consist of either discrete cells (having an aperture passing there through) integrally formed into plural plates or plural toroidal cores oriented within plural planes. X and Y addressing conductors are utilized to coincidentally address the selected memory location.

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Time Sharing for a Magnetic Memory

Magnetic memory systems for digital information often consist of either discrete cells (having an aperture passing there through) integrally formed into plural plates or plural toroidal cores oriented within plural planes. X and Y addressing conductors are utilized to coincidentally address the selected memory location.

The drawing shows a memory utilizing pairs of plural plates (Pl- P2, P3-P4, etc.) corresponding in number to the number of bits to be stored at each X-Y address. Each plate contains a printed sense winding

serially passing through the aperture of every cell. To read, two address wires, passing through a particular cell in each plate, are pulsed in a selected direction, and an appropriate voltage is induced in the sense winding of each plate of each pair, as determined by the digital information contained in that particular pair of apertured cells. The differential amplifier associated with each pair cancels the half-address noise and applies an appropriate voltage to the sense amplifier. Immediately following and during a write operation, this same pair of cells is again coincidentally addressed by current pulses of the opposite polarity, and the inhibit drivers, corresponding to each pair of plates, pass a current pulse through the sense windings.

Ordinarily, this memory requires two plates for each bit within the word of digital information to be stored. Moreover, each pair requires a sense and inhibit instrumentation. Since the number of components required to i...