NASA NTRS · 19770000253
Bias-field equalizer for bubble memories
Abstract
Magnetoresistive Perm-alloy sensor monitors bias field required to maintain bubble memory. Sensor provides error signal that, in turn, corrects magnitude of bias field. Error signal from sensor can be used to control magnitude of bias field in either auxiliary set of bias-field coils around permanent magnet field, or current in small coils used to remagnetize permanent magnet by infrequent, short, high-current pulse or short sequence of pulses.
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Keefe, G. E.. 1977-11-01. Bias-field equalizer for bubble memories. https://ntrs.nasa.gov/citations/19770000253
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