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Twin-Fed Multiplexed Detector for Ion-Implanted, Contiguous-Disk Bubble Devices

IP.com Disclosure Number: IPCOM000047731D
Original Publication Date: 1983-Dec-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Sanders, IL: AUTHOR

Abstract

A multiplexing detector scheme using a single, twin-fed detector is shown in Fig. 1 and the circuit configuration is shown schematically in Fig. 2. The detector 1 has an expander conductor 2 and a magnetoresistive sensor 3 positioned over a nonimplanted pattern that forms major loop 4 and major loop 5. Bubbles are expanded bidirectionally along nonimplanted edges 6 and 7 by current pulses in the overlay conductor 2. Bubbles are detected by the magnetoresistive sensor element 3 in the usual manner and collapsed after detection by reversing the polarity of the current pulse in the conductor.

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Twin-Fed Multiplexed Detector for Ion-Implanted, Contiguous-Disk Bubble Devices

A multiplexing detector scheme using a single, twin-fed detector is shown in Fig. 1 and the circuit configuration is shown schematically in Fig. 2. The detector 1 has an expander conductor 2 and a magnetoresistive sensor 3 positioned over a nonimplanted pattern that forms major loop 4 and major loop 5. Bubbles are expanded bidirectionally along nonimplanted edges 6 and 7 by current pulses in the overlay conductor 2. Bubbles are detected by the magnetoresistive sensor element 3 in the usual manner and collapsed after detection by reversing the polarity of the current pulse in the conductor. The expander conductor is operated in the duplex mode, that is, it is pulsed twice per rotating field cycle at 180OE intervals, permitting bubbles propagating along major loop paths 4 and 5 to be expanded alternately, one bubble from each path every cycle.

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