Static information storage and retrieval – Magnetic bubbles – Generators
Patent
1978-01-13
1979-11-27
Moffitt, James W.
Static information storage and retrieval
Magnetic bubbles
Generators
365 15, 365 26, 365 43, G11C 1908
Patent
active
041764048
ABSTRACT:
A magnetic bubble memory structure having an enhanced storage density is made possible by reducing the circuit period, that is the distance between bubbles, in the storage section of the device. This reduction of the circuit period is made possible by using a gap tolerant propagation element, e.g. asymmetrical chevrons. The bubble storage sections are structured such that the areas closest to the transfer gates have a larger circuit period than the remainder of the storage section. The bubble chip architecture utilizing this means of enhancing the storage density may be of the major-minor loop configuration or the block-replicate configuration. Bubble storage sections in the form of loop structures may have a folded loop or an h loop configuration as well as a closed loop configuration. The reduction in circuit period accomplishes enhancement of the storage density without reducing the bubble diameter and other minimum circuit features to achieve this goal.
REFERENCES:
patent: 4014009 (1977-03-01), Bonyhard et al.
patent: 4133043 (1979-01-01), Hiroshima et al.
IEEE Transactions on Magnetics - vol. Mag-12, No. 6, Nov. 1976, pp. 614-617.
IEEE Transactions on Computers - Nov. 1975, pp. 1125-1129.
Chang Christopher T. M.
Dimyan Magid Y.
Hubbell Wayne C.
Linn John C.
Donaldson Richard L.
Hiller William E.
Moffitt James W.
Sharp Melvin
Texas Instruments Incorporated
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