Electrical transmission or interconnection systems – Anti-induction or coupling to other systems
Patent
1974-03-13
1976-02-24
Urynowicz, Jr., Stanley M.
Electrical transmission or interconnection systems
Anti-induction or coupling to other systems
340174TF, 340174SR, H03K 19168, G11C 1114
Patent
active
039406318
ABSTRACT:
Three magnetic bubble logic gates are disclosed in this application. One gate produces the AND and NAND logic functions, one gate produces the OR and NOR logic functions, and the third gate produces the majority function. In the gate providing the AND and NAND functions and in the gate providing the OR and NOR functions, a bubble generator applies magnetic bubbles at the binary variable rate to a first bubble propagation track, which diverges into two downstream tracks with the bubble being transmitted through the point of divergence to a preferred one of the two downstream tracks unless repelled to the unpreferred downstream track. Bubbles representing the binary variables are applied to data propagation tracks which approach the point of divergence in the first track. In the gate providing the AND and NAND functions, this approach is only close enough so that simultaneous bubbles representing both binary variables are required to repel a bubble at the point of divergence to the unpreferred track. In the gate providing the OR and NOR functions, the approach of the tracks containing the binary variables is sufficiently close that a bubble on either of these tracks will repel a bubble at the point of divergence to the unpreferred track. In the gate providing the majority function, five adjacent tracks are provided to which binary variables are applied. A bridging pattern of circuit elements is provided extending across the tracks which bridging pattern increases in density from track to track with the increase in density being in the same direction between each adjacent pair of tracks.
REFERENCES:
patent: 2678287 (1972-07-01), Chow
patent: 3735145 (1973-05-01), Heinz
patent: 3736577 (1973-05-01), Chang
patent: 3743851 (1973-07-01), Kohara
patent: 3798607 (1974-03-01), Minnick et al.
IBM Tech. Disc. Bull. "Bubble Domain Logic Devices" by Lin; Vol. 13; No. 10; 3/71; pp. 3068, 3068a.
IBM Tech. Disc. Bull. "Bubble Domain Logic Circuits" by Lin; Vol. 13; No. 10; 3/71; pp. 3019, 3020.
IBM Tech. Disc. Bull. "Read/Write Control" by Walker; Vol. 13; No. 11; 4/71; pp. 3474, 3475.
IBM Tech. Disc. Bull. "Multiple Input Magnetic Bubble AND Gate" by Sakalay; Vol. 14; No. 12; 5/72.
Monsanto Company
Urynowicz, Jr. Stanley M.
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