Pulsed field accessed bubble propagation circuits

Details Pulsed field accessed bubble propagation circuits Pulsed field accessed bubble propagation circuits

1974-01-11

1976-01-20

Urynowicz, Jr., Stanley M.

Communications: electrical

Digital comparator systems

340174SR, G11C 1114, G11C 1908

Patent

active

039342360

ABSTRACT:
Overlay patterns of discrete circuit elements for field-accessed, magnetic bubble propagation are driven by repetitive sequences of pulsed magnetic fields directed along axes which are parallel to consecutive overlay elements or segments with different orientations. A chevron circuit is driven by a series of reversing pairs of pulsed fields aligned alternately with the legs of the chevron elements. Two opposite parallel chevron circuits are driven in the same direction by the same sequence of pulsed fields. A broken element circuit, resembling a chevron circuit with the vertices removed, is driven in a similar manner.

REFERENCES:
patent: 3723716 (1973-03-01), Bobeck et al.
patent: 3815107 (1974-06-01), Almasi
IBM Tech. Disc. Bull. "Bubble Domain Logic Circuits" by Lin, Vol. 13, No. 10, 3/71 pp. 3019-3020.
IBM Tech. Disc. Bull. "Herringbone Pattern for Cylindrical Magnetic Domains" by Keefe et al., Vol. 13, No. 11, 4/71 pp. 3307, 3308.

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