Communications: electrical – Digital comparator systems
Patent
1975-09-08
1976-10-26
Habecker, Thomas B.
Communications: electrical
Digital comparator systems
G11C 1102
Patent
active
039887235
ABSTRACT:
A generator of single wall domains, i.e., bubbles, for a bubble memory system is disclosed. The generator includes a closed feed ring, constructed of a repetitive pattern of magnetically soft chevrons, having merging input and output channels of similar chevron design. A nucleator in the input channel, driven at one-half the frequency of the rotating in-plane field, generates a bubble every other cycle of the in-plane field frequency such that only alternate positions along the input channel, and correspondingly the feed ring, are initially filled with bubbles. The bubbles, as driven around the four 90.degree. corners of the feed ring, are delayed one complete cycle of the in-plane field frequency such that the generated bubbles from the input channel and the bubbles in the feed ring fill alternate positions along the feed ring. Thus, after the first generated bubble completes two complete cycles of the feed ring, the feed ring is filled. Once the feed ring is filled, the nucleator is no longer used, as the feed ring, via the output channel, continually feeds bubbles to the associated major loop.
REFERENCES:
patent: 3879585 (1975-04-01), Bobeck
Kochel Le Roy J.
Lins Stanley J.
Grace Kenneth T.
Habecker Thomas B.
Nikolai Thomas J.
Sperry Rand Corporation
Truex Marshall M.
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