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A word-oriented transistor driven non-destructive readout memory

Published: 03 May 1960 Publication History

Abstract

Using three-aperture ferrite memory cells, a 512-word non-destructive readout memory has been operated with transistor drivers. Writing and reading are both achieved with bipolar two-pulse sequences, which are, respectively, ERASE, WRITE and SET, READ. Due to the inherently non-destructive manner in which the cells are operated, no regeneration cycle is necessary to restore information to interrogated cells. The necessary bipolar writing and reading pulse sequences are conveniently provided by a novel magnetic switch matrix, in which all rows and columns are driven in coincidence except those intersecting at the desired address. The resultant driving current at the desired address is the sum of all the transistor driver currents, or 2(n-1) times the individual transistor driver currents for an "n" square matrix.

References

[1]
Rajchman, J. A. and Lo, A. W., "The Transfluxor - a Magnetic Gate With Stored Variable Setting", RCA Review, vol. 16, June, 1955.
[2]
Rajchman, J. A. and Lo, A. W. "The Transfluxor", Proc. I.R.E., vol. 44, p321; March, 1956.
[3]
Hunter, L. P. and Bauer, E. W., "High Speed Coincident - Flux Magnetic Storage Principles", J. Appl. Phys., vol. 27, p1257; November, 1956.
[4]
Baldwin, J. A., Jr., and Rogers, J. L., "Inhibited Flux - A New Mode of Operation of the Three-Hole Memory Core", J. Appl. Phys., vol. 30, p58s; April, 1959.
[5]
Lawrence, W. W., Jr., "Recent Developments in Very High Speed Magnetic Storage Techniques", Proc. Eastern Joint Computer Conf., 1957, p101.
[6]
Constantine, G., Jr., "A Load-Sharing Matrix Switch", IBM Journal of Research, p204; July, 1958.

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cover image ACM Conferences
IRE-AIEE-ACM '60 (Western): Papers presented at the May 3-5, 1960, western joint IRE-AIEE-ACM computer conference
May 1960
391 pages
ISBN:9781450378697
DOI:10.1145/1460361
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Association for Computing Machinery

New York, NY, United States

Publication History

Published: 03 May 1960

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