Tri-state-capable driver circuit

Details Tri-state-capable driver circuit Tri-state-capable driver circuit

1993-08-17

1994-12-06

Westin, Edward P.

Electronic digital logic circuitry

Tri-state

With field-effect transistor

326 84, 326110, H03K 1902

Patent

active

053714237

ABSTRACT:
A tri-state capable driver circuit or totem pole circuit is formed in BiCMOS technology and includes a selection circuit, first and second drive circuits, and first and second bipolar transistors. A short circuit unit is connected between the base and the emitter of the first bipolar transistor to prevent excessively high inhibit voltages across the base-emitter junction of the first bipolar transistor. The operation of the short circuit unit depends upon signals received at the tri-state activation input.

REFERENCES:
patent: 4703203 (1987-10-01), Gallup et al.
patent: 4725982 (1988-02-01), Hara et al.
patent: 4746817 (1988-05-01), Banker
patent: 5001365 (1991-03-01), Murabayashi
patent: 5083048 (1992-01-01), Kashimura

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