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Data Stream Merge Components in Bubble Domain Memory

IP.com Disclosure Number: IPCOM000089408D
Original Publication Date: 1977-Oct-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 76K

Publishing Venue

IBM

Related People

Cohen, MS: AUTHOR [+2]

Abstract

When two major propagation paths are used in a bubble domain major/minor loop memory, data reversal results. As illustrated in Fig. 1, bubble domains proceeding in major path A from generator G move to the left while bubble domains moving in major path B toward detector D move to the right. The first bit from generator G will be placed in minor loop 1, the second bit in minor loop 2, etc. However, when the data bits are removed in parallel from each of the minor loops 1, 2, ... M, their order will be reversed as they move to detector D.

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Data Stream Merge Components in Bubble Domain Memory

When two major propagation paths are used in a bubble domain major/minor loop memory, data reversal results. As illustrated in Fig. 1, bubble domains proceeding in major path A from generator G move to the left while bubble domains moving in major path B toward detector D move to the right. The first bit from generator G will be placed in minor loop 1, the second bit in minor loop 2, etc. However, when the data bits are removed in parallel from each of the minor loops 1, 2, ... M, their order will be reversed as they move to detector D.

Figs. 2 and 3 show merge components which can be used to move data in major path B from right to left in order to maintain the sequence of data removed in parallel from the minor loops. Only two minor loops are shown in these figures.

Referring to Fig. 2, data from generator G proceeds from right to left in major path A in the direction indicated by arrow 10. The Y-bar transfer gates TG are used to transfer bubble domains into the minor loops in accordance with current pulses in conductor 12. When the information is to be read from the minor loops, other transfer gates TG remove the bubbles from the minor loops for propagation to major path B where bubble domains move to the left along the direction indicated by arrow 14. The merge elements, generally designated 16, are magnetic elements located between the T and I bars defining path B and the transfer gates TG used to remove bu...