Mutually exclusive magnetic bubble propagation circuits

Details Mutually exclusive magnetic bubble propagation circuits Mutually exclusive magnetic bubble propagation circuits

1974-01-11

1977-05-03

Moffitt, James W.

Communications: electrical

Digital comparator systems

G11C 1908

Patent

active

040217906

ABSTRACT:
Closed loop propagation channels for magnetic bubbles are mutually exclusively accessed by means of two different sets of repeating sequences of discrete, pulsed magnetic drive field orientations. A closed loop bubble propagation circuit is driven by a repeating sequence of pulsed orientations in which a plurality of interlaced subsets of the sequence operate corresponding sections of the circuit. A closed loop zigzag circuit traversing sections of the loop parallel to the sides of an equilateral triangle is driven by a sequence of pulsed field orientations aligned respectively with the sides of the equilateral triangle. Continuous overlay circuits are introduced driven by sequences of discrete nonorthogonal, pulsed drive field orientations repetitively realigning with consecutive segments of the overlay circuit.

REFERENCES:
patent: 3508225 (1970-04-01), Smith
patent: 3518643 (1970-06-01), Pemeski
patent: 3750154 (1973-07-01), Almasi
patent: 3760390 (1973-09-01), Murakami
patent: 3815107 (1974-06-01), Almasi
AIP Conference Proceedings "Propagation Characteristics of Parallel Bar Circuits," by Ng et al., No. 13, Part 1, Nov. 13-16, 1973; pp. 127-131.
IBM Tech. Disc Bull., "Bubble Domain Logic Circuits," by Lin; vol. 13; No. 10; 3/71, pp. 3019, 3020.
IBM Tech Disc. Bull., "Herringbone Pattern for Cylindrical Magnetic Domains," by Reefe et al., vol. 13, No. 11; 4/71; pp. 3307, 3308.

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