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Using Bubble Lattice Wave Motion as a Shifting Mechanism

IP.com Disclosure Number: IPCOM000073947D
Original Publication Date: 1971-Feb-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Bogholtz, WE: AUTHOR [+5]

Abstract

The drawing shows an orthoferrite shift register in which bubbles 3 are shifted along a channel that is defined by two magnetic strips 4 and 5 formed on the surface of an orthoferrite wafer 6. Magnetic projections 7 along the edges of the channel define bubble positions between shift operations. A bubble is moved along strip 4 to represent a "1" or along strip 5 to represent a "0". Thus, there is always a bubble in each position of the shift register. The spacing between adjacent projections 7 and between strips 4 and 5 is appropriate for the magnetic interaction of adjacent bubbles to produce propagation down the channel as bubbles are applied to the channel entrance.

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Using Bubble Lattice Wave Motion as a Shifting Mechanism

The drawing shows an orthoferrite shift register in which bubbles 3 are shifted along a channel that is defined by two magnetic strips 4 and 5 formed on the surface of an orthoferrite wafer 6. Magnetic projections 7 along the edges of the channel define bubble positions between shift operations. A bubble is moved along strip 4 to represent a "1" or along strip 5 to represent a "0". Thus, there is always a bubble in each position of the shift register. The spacing between adjacent projections 7 and between strips 4 and 5 is appropriate for the magnetic interaction of adjacent bubbles to produce propagation down the channel as bubbles are applied to the channel entrance.

Bubbles are advanced from a bubble generator 8 to the position of a loop 9 where the bubbles are held by a magnetic strip 10. When a bubble is in the position of loop 9, it is ready for a write operation which will shift the bubble to the first element 7 along either strip 4 or strip 5. Loop 9 is energized to shift the bubble from the position of loop 9 to the position of the channel input. Energizing coil 11 causes the entering bubble to be attracted to strip 4 to represent a 1. In the absence of a current in write coil 11, the bubble is attracted to strip 5 and represents a 0. For sensing a 1 or a 0, the strips 4 and 5 are diverged so that the 1 and O positions are nonoverlapping and a 0 is sensed by a coil 12 and a 1 is sensed by a coil 13...