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Bias-field equalizer for bubble memoriesMagnetoresistive 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.
Document ID
19770000253
Document Type
Other - NASA Tech Brief
Authors
Keefe, G. E. (IBM)
Date Acquired
August 8, 2013
Publication Date
November 1, 1977
Publication Information
Publication: NASA Tech Briefs
Volume: 2
Issue: 2
ISSN: 0145-319X
Subject Category
ELECTRONIC COMPONENTS AND CIRCUITS
Report/Patent Number
MFS-23189
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.