Static information storage and retrieval – Magnetic bubbles – Conductor propagation
Patent
1977-06-09
1979-08-07
Moffitt, James W.
Static information storage and retrieval
Magnetic bubbles
Conductor propagation
365 2, 365 18, 365 23, 365 27, 365 31, 365 37, G11C 1908
Patent
active
041640284
ABSTRACT:
A current access bubble memory system includes a method and device for propagating and switching isolated bubbles within a plurality of orthogonal propagation channels. The device includes two orthogonal arrays of parallel current conductors oriented at 45.degree. angles to the two orthogonal bubble translation axes. The conductors in each array are regularly spaced a distance S apart from center to center. The first array of conductors are connected in parallel to a first current source and the second array of conductors are connected in parallel to a second current source. The propagation channels are defined by confining means to have a width d where d is the bubble diameter. The centerline of the channels are spaced a distance of about .sqroot.2 S/8 from the center of adjacent conductor intersections. Bubble translation occurs through sequential activation of the two bipolar current sources. Use of specific activation sequences allow selective control of the bubble propagation path at channel intersections. The method provides for flexible design of memory configurations with all accessing and switching functions controllable by means of specific activation sequences of the two current sources.
REFERENCES:
patent: 3523286 (1970-08-01), Bobeck et al.
patent: 3786428 (1974-01-01), Takahashi
patent: 3786447 (1974-01-01), Yamauchi
patent: 4023150 (1977-05-01), Voegeli
patent: 4052708 (1977-10-01), Fairholme
patent: 4059829 (1977-11-01), Kinsner et al.
AIP Conference Proceedings on Magnetism and Magnetic Materials-No. 24, 1974, pp. 550-551.
International Business Machines - Corporation
Kieninger Joseph E.
Moffitt James W.
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