G - Physics – 11 – C
Patent
G - Physics
11
C
352/37.2
G11C 11/14 (2006.01) G11C 19/08 (2006.01)
Patent
CA 1083711
TITLE CHANNEL BAR BUBBLE PROPAGATE CIRCUIT INVENTORS Edward Della Torre Witold Kinsner ABSTRACT OF THE DISCLOSURE The magnetic bubble propagate circuit combines the forces on a bubble due to the properties of a modulated channel in a bubble material with the forces on the bubble due to a field produced by discrete magnetic poles P1 and P2 to move the bubble along a predetermined path. The channels may be modulated in width or in depth and be of the mesa or groove type so as to have a channel with periodically spaced stable bubbles positions O which are separated by barrier positions X. The poles P1 and P2 consist of soft-magnetic material bars which are placed either along the channel perpendicular thereto such that alternate ends of sequential bars overlap the channel between pairs of stable positions, each bar providing a pole P1 or P2, or along the channel parallel thereto such that the ends of the bars fall between adjacent pairs of stable positions, each bar providing a pole P1 and P2. The propagate circuit thus has repeated pattern O, X, P1, O, X, P2. The bars P1 and P2 are periodically magnetized-to opposite polarities by an alternating transverse magnetic field which is parallel to the length of the bars to produce a force on the bubbles which are in a stable positions to move them across adjacent barrier positions X. When the field reverses, the bubbles move across the next barrier. Turn-around circuits and as transfer gates which may be combined with the basic propagate circuit to form loop and minor-major loop memory arrangements may be similarly constructed. These are made such that the pattern O, X, P1, O, X, P2 is not broken either between two parallel propagate circuits to form a loop or between a minor loop and a major loop in a memory arrangement. The minor loop and the major loops are driven by independent perpendicular alternating magnetic fields and thus these fields control the transfer of bubbles between them.
271000
Kinsner Witold
Torre Edward D.
Canadian Patents And Development Limited
Rymek Edward
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