Reverse-rotation transfer gates

Details Reverse-rotation transfer gates Reverse-rotation transfer gates

1980-11-03

1982-11-02

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

Guide structure

365 24, G11C 1908

Patent

active

043576842

ABSTRACT:
Transfer between paths in ion-implanted magnetic bubble memories has been achieved without the use of transfer conductors. The transfer mechanism takes advantage of the three-fold anisotropy of the implanted drive layer which makes it possible for bubbles to pass freely through gaps in one direction while being obstructed from passing through in the other direction. Transfer is controlled by a brief reversal of the direction of rotation of the in-plane field. In one embodiment, a bidirectional transfer gate is employed. Configurations using unidirectional gates and hybrid gates using conductor and reverse-rotation controlled transfer are also shown.

REFERENCES:
patent: 4157591 (1979-06-01), Dekker et al.
patent: 4276614 (1981-06-01), Nelson et al.

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