Dual access magnetic domain memory

Details Dual access magnetic domain memory Dual access magnetic domain memory

1975-01-17

1976-07-20

Cook, Daryl W.

Communications: electrical

Digital comparator systems

340174SR, G11C 1114, G11C 1900

Patent

active

039710050

ABSTRACT:
A magnetic domain memory system includes a domain propagation track, having a plurality of minor loops of equal domain capacity, first and second major loops of equal domain capacity and first and second groups of transfer switches which couple each minor loop to the first and second major loops, respectively, and a control system, responding to asynchronous commands, to access any selected record in the minor loop through the first group of unused switches which the circulating record encounters. The accessed records are updated in the major loops, each of which includes a domain detector, generator and annihilator, and the updated records are transferred back into the locations in the minor loops which the original records occupied. The design of the dual access memory provides domain bit synchronization which means that after any domain bit makes one full circulation around the major loop, the bit may be transferred into the same location in the minor loop which the bit originally occupied.

REFERENCES:
patent: 3701132 (1972-10-01), Bonyhard
patent: 3737882 (1973-06-01), Furuoya
patent: 3810133 (1974-05-01), Bobeck
patent: 3838407 (1974-09-01), Juliussen

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