I.sup.2 L Static shift register

Details I.sup.2 L Static shift register I.sup.2 L Static shift register

1980-02-21

1982-07-27

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307459, 307299B, G11C 1928

Patent

active

043419607

ABSTRACT:
Each bit of the register includes a plurality of active elements which perform as NOR logic gates. Each active element comprises an I.sup.2 L unit consisting of a bipolar inverter transistor and a bipolar injector transistor. Each element is cross-coupled with the previous element and the subsequent element, resulting in the static characteristic of the register. Data transfer control signals are generated which consist of a number of time synchronized pulse trains. Each pulse train is applied to a different one of the active elements in a bit and serves to energize same when positive (high). The shift register is bi-directional. The direction of data transfer is determined solely by the sequence of the data transfer control signals. The register is reset by causing all components of the control signal to simultaneously go low and thereafter restarting same in the proper sequence.

REFERENCES:
patent: 3195053 (1965-07-01), Jeeves
patent: 3636376 (1972-01-01), Hoffmann
patent: 3851187 (1974-11-01), Pao et al.
patent: 4075508 (1978-02-01), Scott
patent: 4099263 (1978-07-01), Scott
patent: 4209715 (1980-06-01), Aoki

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