Logic gate for cross-tie wall memory system incorporating isotro

Details Logic gate for cross-tie wall memory system incorporating isotro Logic gate for cross-tie wall memory system incorporating isotro

1977-01-03

1978-02-21

Moffitt, James W.

Static information storage and retrieval

Magnetic shift registers

Thin film

365 89, 365171, G11C 1908

Patent

active

040756130

ABSTRACT:
A plurality of data tracks, each formed of a strip of isotropic magnetic film, i.e., having substantially zero uniaxial anisotropy, are configured into a cross-tie wall memory system logic gate. The data-track-defining-strip of isotropic magnetic film utilizes its shape, i.e., its edge contour, induced anisotropy, rather than its easy axis magnetic field induced anisotropy, to constrain the cross-tie wall within the planar contour of the film strip. The use of the shape induced anisotropy of an isotropic strip of magnetic film permits the use of nonlinear, i.e., curved, data tracks. Two input and one output data tracks are configured into an AND/OR logic gate to permit the cross-tie wall memory system to perform both memory and logic functions.

REFERENCES:
patent: 3723716 (1973-03-01), Bobeck et al.
patent: 3735145 (1973-05-01), Heinz
patent: 3868659 (1975-02-01), Schwee
AIP Conference on Magnetism & Magnetic Materials, Dec. 9-12, 1975, pp. 624-625.

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