Non-conservative bubble logic circuits

Details Non-conservative bubble logic circuits Non-conservative bubble logic circuits

1974-09-20

1976-08-03

Moffitt, James W.

Communications: electrical

Digital comparator systems

307 88LC, 340347DD, G11C 1114

Patent

active

039732487

ABSTRACT:
Magnetic bubble logic circuits performing the functions of various forms of flip-flops and decoders are presented. Set-reset and trigger flip-flops are constructed from specialized 3--3 conservative bubble logic circuits. Two forms of tree-type decoders employing crossovers of bubble tracks are illustrated for generating all possible product permutations of a plurality of input variables. Planar decoders and cross point circuits without crossovers are combined in matrix form to provide a multi-variable decoder without internal crossovers.

REFERENCES:
patent: 3638208 (1972-01-01), Chow
patent: 3723716 (1973-03-01), Bobeck et al.
patent: 3743851 (1973-07-01), Kohara
patent: 3753253 (1973-08-01), Smith
patent: 3770978 (1973-11-01), Kluge
patent: 3811110 (1974-05-01), Inose et al.
patent: 3821725 (1974-06-01), Kita et al.
patent: 3824567 (1974-07-01), Sakalay
patent: 3831152 (1974-08-01), Perneski et al.
IBM Tech. Disc. Bull., "Multiple Input Magnetic Bubble AND Gate," by Sakalay, vol. 14, No. 12, May 1972, pp. 3691, 3692.

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