Magnetic bubble memory purge and verification system

Details Magnetic bubble memory purge and verification system Magnetic bubble memory purge and verification system

1985-05-10

1988-03-29

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

365218, G11C 1908

Patent

active

047348836

ABSTRACT:
An arrangement for purging a magnetic bubble memory and providing a visible purge verification utilizes the thermal compensation Z-axis coil for providing a purge field. A power supply, purge switch and current sensitive circuit interrupter are connected across the thermal compensation coil. When the switch is closed, a surge of relatively high current many times greater than that required for thermal compensation is applied to the coil. Accordingly, the bubbles in the memory will completely disappear. The circuit interrupter is used to halt the purge current once it exceeds the required purge value. This protects the thermal compensation winding and also provides a visual verification that a purge pulse has occurred.

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patent: 3602911 (1971-08-01), Kurtzig
patent: 3711841 (1973-01-01), Geusic et al.
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patent: 3744042 (1973-07-01), Cutler et al.
patent: 4068219 (1978-01-01), Chow
patent: 4400809 (1983-08-01), Whitinger
patent: 4675513 (1987-06-01), Kuze

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