Bidirectional tristate buffer with default input

Details Bidirectional tristate buffer with default input Bidirectional tristate buffer with default input

1995-07-26

1996-05-14

Westin, Edward P.

Electronic digital logic circuitry

Interface

Current driving

326 83, 326 57, H03K 190175

Patent

active

055171354

ABSTRACT:
A bidirectional tristate buffer includes a default input such that the signal applied to one of the lines connected to the bidirectional buffer is always applied to the input terminal of a buffer element in the bidirectional buffer and applied by the output terminal of the buffer element to any load which may be driven by the buffer output terminal. In a preferred embodiment, the tristate bidirectional buffer with default input requires only four transistors plus the transistors which comprise the buffer element and memory cells for controlling the direction.

REFERENCES:
patent: 34363 (1993-08-01), Freeman
patent: 4621202 (1986-11-01), Pumo
patent: 4680491 (1987-07-01), Yokouchi
patent: 4695740 (1987-09-01), Carter
patent: 4713557 (1987-12-01), Carter
patent: 4835418 (1989-05-01), Hsieh
patent: 4987319 (1991-01-01), Kawana
patent: 5248908 (1993-09-01), Kimura

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