Bubble memory vector shift

Details Bubble memory vector shift Bubble memory vector shift

G - Physics

11

C

352/37.2

G11C 11/14 (2006.01) G11C 19/08 (2006.01)

Patent

CA 1101544

Abstract A bubble memory device has a minor loop bubble track, a major loop bubble track and a transfer bubble track comprising permalloy patterns in the same plane. An external field device propagates the bubbles in the loop bubble tracks. The transfer bubble track comprising an elongated permalloy pattern having one end adjacent to a normal positional location of a bubble in the minor loop bubble track and its other end adjacent to a normal positional location of a bubble in the major loop bubble track. An in-plane continuously rotating field generates a first plurality of field vectors having different directions of effective fields in the plane of the permalloy patterns which propagates the bubbles around the major and minor loop bubble tracks. A control mechanism generating a transfer field vector in the plane of the permalloy patterns for diverting bubbles in one of the loop tracks through the transfer track to the other of the loop tracks. The arrange- ment eliminates the need for a transfer conductor and hence makes the device simpler and cheaper than prior devices.

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