Driver circuit for a plurality of outputs

Details Driver circuit for a plurality of outputs Driver circuit for a plurality of outputs

1992-08-24

1995-03-14

Westin, Edward P.

Electronic digital logic circuitry

Interface

Current driving

377 68, 377 80, 327 93, 327 21, 327108, H03K 19096, H03K 1716, G11C 1928

Patent

active

053979427

ABSTRACT:
A driver circuit in an integrated circuit includes a flip-flop circuit and a plurality of AND gates. The flip-flop circuit causes an external control signal which is supplied externally to synchronize with a clock signal, and produces an internal control signal. The AND gates control a plurality of outputs based on a data signal in accordance with the internal control signal. Since the internal control signal is synchronized with the clock signal, changes in the outputs from the AND gates are delayed from the timing of the clock signal. Thus, it is possible to prevent the occurrence of malfunction caused by a switching current to flow in transient of changes in the outputs.

REFERENCES:
patent: 4057738 (1977-11-01), Nishimura
patent: 4185210 (1980-01-01), Zuk
patent: 4284953 (1981-08-01), Hepworth et al.
patent: 4349754 (1982-09-01), Bull
patent: 4417155 (1983-11-01), Aizawa
patent: 4479065 (1984-10-01), Aizawa
patent: 4775840 (1988-10-01), Ohmori et al.
patent: 5122694 (1992-06-01), Bradford et al.
Texas Instruments Display Driver Handbook, D2715, pp. 3-91 to 3-94, Mar. 1983.

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