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Field Accessed, Conductorless Data Switch

IP.com Disclosure Number: IPCOM000051846D
Original Publication Date: 1981-Mar-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Tao, LJ: AUTHOR

Abstract

Conductorless data switch designs for field-accessed bubble devices are shown in Figs. 1 and 2. In Fig. 1, the switch 10 has a loop of four C bars 12, 14, 16 and 18 containing five bubbles. A passive replicator 20 is linked to the switch 10 by C-bar 22 and to the data input channel containing C-bars 24, 26 and 28. Clockwise rotation of the drive field does not switch any bubble into the data input channel. Reversing the drive field when a bubble is positioned near the passive replicator for one cycle of counterclockwise rotation followed by two cycles of clock wise rotation causes a bubble to be replicated and pass into the data input channel. This design has an average writing time of 2 cycles, i.e., 1 cycle to write a ""0'' and 3 cycles to write a ""1.''

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Field Accessed, Conductorless Data Switch

Conductorless data switch designs for field-accessed bubble devices are shown in Figs. 1 and 2. In Fig. 1, the switch 10 has a loop of four C bars 12, 14, 16 and 18 containing five bubbles. A passive replicator 20 is linked to the switch 10 by C-bar 22 and to the data input channel containing C-bars 24, 26 and 28. Clockwise rotation of the drive field does not switch any bubble into the data input channel. Reversing the drive field when a bubble is positioned near the passive replicator for one cycle of counterclockwise rotation followed by two cycles of clock wise rotation causes a bubble to be replicated and pass into the data input channel. This design has an average writing time of 2 cycles, i.e., 1 cycle to write a ""0'' and 3 cycles to write a ""1.''

In the design shown in Fig. 2, the average writing time is 1 1/4 cycles. With clockwise rotation of the drive field, bubbles propagate to the right along the elements 30-40 of generator channel 42. No bubbles will enter the input channel
44.

When the drive field is reversed at phase 1 by 1/4 cycle to phase 4, the bubble at the top of element 32 will propagate via I-bar 46 to element 48 due to the asymmetric design of element 32. Returning to clockwise rotation, the bubble on element 48 will propagate to element 50 in the data input channel 44.

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