Static information storage and retrieval – Magnetic bubbles – Rotating field circuits
Patent
1983-06-29
1985-04-23
Moffitt, James W.
Static information storage and retrieval
Magnetic bubbles
Rotating field circuits
365 7, G11C 1908
Patent
active
045133964
ABSTRACT:
A method of operating a magnetic bubble memory (of the type that has a plurality of magnetic bubbles which move in a plane in response to a magnetic drive field that rotates in said plane) includes the steps of sending respective currents through a pair of field coils to produce the rotating magnetic field; generating at least one of the currents to consist of a series of positive and negative going waveforms separated by a dwell period so that the rotation of the field temporarily stops during the dwell period; and timing the dwell period to occur when the bubbles are at predetermined locations in the memory.
REFERENCES:
patent: 3763478 (1973-10-01), Yoshizawa et al.
patent: 4094003 (1978-06-01), Kinsner et al.
patent: 4283775 (1981-11-01), Cohen
patent: 4443867 (1984-04-01), Boshra-Riad et al.
Burroughs Corporation
Fassbender Charles J.
Moffitt James W.
Peterson Kevin R.
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