High speed output buffer circuit with overlap current control

Details High speed output buffer circuit with overlap current control High speed output buffer circuit with overlap current control

1990-04-02

1992-02-18

Westin, Edward P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307451, 307542, 307475, 307548, 307558, 307263, H03K 1716, H03K 19094, H03K 512, H03K 17687

Patent

active

050897225

ABSTRACT:
A pre-driver stage includes two pairs of series-stacked transistors for responding to input stage outputs and provides first and second outputs to an output driver stage. The first output becomes low at a certain delay period after the second output becomes low, and the second output becomes high at a certain delay period after the first output becomes high. Therefore, the turn-off of the active driver transistor is completed before the turn-on of the opposite output transistor, inhibiting an overlap current. In another form, the buffer circuit also uses assist transistors placed near the driver transistors for assisting the opposite driver transistors in turning off.

REFERENCES:
patent: 4772812 (1988-09-01), Desmarais
patent: 4820942 (1989-04-01), Chan
patent: 4885485 (1989-12-01), Leake et al.
patent: 4908528 (1990-03-01), Huang
patent: 4918339 (1990-04-01), Shigeo et al.
patent: 4954729 (1990-09-01), Urai
patent: 4959565 (1990-09-01), Knecht et al.
patent: 4961010 (1990-10-01), Davis

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