Communications: electrical – Digital comparator systems
Patent
1973-09-28
1976-04-20
Urynowicz, Jr., Stanley M.
Communications: electrical
Digital comparator systems
340174SR, 340174CA, 340174EB, G11C 1114, G11C 1908
Patent
active
039522911
ABSTRACT:
A technique for enhancing readout of magnetic bubble data by producing two separate, complementary multiplicities of bubbles representing respectively the presences and the absences of bubbles in a data stream. A pair of detectors register the presence of the respective multiplicities of bubbles. The outputs of the detectors are compared to produce a single output indicative of the presence or absence of the original data bubble. In one embodiment a bubble logic gate causes a single bubble bit in the data stream to logically influence a train of bubbles in a separate closed circuit operating at a rate which is a multiple of the rate of the data stream. Depending on the presence or absence of a bubble in the data stream, the train of bubbles is directed to one or the other of a pair of magnetoresistive elements spanning the length of the train of bubbles. The magnetoresistive elements form part of a balanced bridge circuit.
REFERENCES:
patent: 3543255 (1970-11-01), Morrow et al.
patent: 3646530 (1972-02-01), Chow
patent: 3680066 (1972-07-01), Copeland
patent: 3696347 (1972-10-01), Copeland
patent: 3735145 (1973-05-01), Heinz
patent: 3820089 (1974-06-01), Lama
IBM Tech. Disc. Bull. "Magnetic Bubble Sensing" by Bailot et al.; Vol. 13; No. 10 3/71; pp. 3100, 3101.
IBM Tech. Disc. Bull. "Passive Magnetic Domain Amplification" by Bosch et al.; Vol. 13; No. 9; 2/71; p. 2739.
Aiken, deceased Howard H.
Bailey Paul T.
Sandfort Robert M.
Monsanto Company
Urynowicz, Jr. Stanley M.
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