Magnetic bubble domain generator and annihilator

Details Magnetic bubble domain generator and annihilator Magnetic bubble domain generator and annihilator

1977-02-24

1978-04-25

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

Guide structure

365 15, 365 7, 365 11, G11C 1908

Patent

active

040865711

ABSTRACT:
Magnetic bubble domain generator and annihilator for use in a magnetic bubble domain memory device of the major-minor bubble propagation path type. The magnetic bubble domain generator and annihilator structure employs a thin metallic loop which is disposed adjacent to a bubble propagation path and is alternatively operable in both a bubble generation and bubble annihilation mode. A DC bias field is provided to the magnetic bubble domain memory circuit device and exists within the metallic loop of the bubble generator and annihilator structure. Upon applying a current pulse to the thin metallic loop from a pulse generator, the bubble generator and annihilator structure is caused to operate in one of the two possible modes. When the current pulse reduces the DC bias field below a predetermined value, the metallic loop operates as a generator to generate a magnetic bubble. Conversely, when the current pulse raises the DC bias field within the metallic loop above a predetermined value, a magnetic bubble within the loop is annihilated.

REFERENCES:
patent: 3967002 (1976-06-01), Almasi et al.
AIP Conference on Magnetism & Magnetic Materials, Dec. 3-6, 1974, pp. 630-632.
IBM Technical Disclosure Bulletin-vol. 13, No. 11, Apr., 1971, p. 3297.
IBM Technical Disclosure Bulletin-vol. 15, No. 6, Nov. 1972, pp. 2017-2018.
IBM Technical Disclosure Bulletin-vol. 19, No. 4, Sept. 1976, p. 1413.

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