Magnetic bubble domain memory chip with major/minor bubble path

Details Magnetic bubble domain memory chip with major/minor bubble path Magnetic bubble domain memory chip with major/minor bubble path

1976-06-14

1978-01-24

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

Plural interacting paths

365 12, 365 39, G11C 1908

Patent

active

040706591

ABSTRACT:
Magnetic bubble domain memory circuit design in which magnetizable overlay patterns of magnetically soft material, e.g. permalloy, are provided on a magnetic bubble-supporting magnetic layer to define bubble propagation paths including transfer gate elements and combined replicate/transfer gate elements. The replicate/transfer gate elements are operable in two modes either combining the replicate and transfer bubble functions in a first mode or operable to effect a bubble transfer function in a second mode, wherein a magnetic bubble is transmitted from one section of a bubble circuit propagation path to another. Processing of data through the use of the magnetic bubble domains may occur in a first-in/first-out basis in one embodiment and on a last-in/last-out basis in another embodiment of the bubble memory. A pulse generator is associated with the transfer gate and the replicate/transfer gate structures. The pulse generator associated with the replicate/transfer gate elements is controlled to deliver pulses in two different modes for respectively selectively actuating the replicate/transfer gate elements to perform the composite replicate/transfer function or the transfer function alone. The transfer gate elements and the replicate/transfer gate elements are configured to include head portions of pickax shape.

REFERENCES:
patent: 3971005 (1976-07-01), Buhrer
patent: 3991411 (1976-11-01), George
patent: 3999172 (1976-12-01), Bhandarkar

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