Bicmos push-pull type logic apparatus with voltage clamp circuit

Details Bicmos push-pull type logic apparatus with voltage clamp circuit Bicmos push-pull type logic apparatus with voltage clamp circuit

1995-09-07

1996-09-24

Westin, Edward P.

Electronic digital logic circuitry

Interface

Current driving

326 18, 326110, 327375, H03K 1908

Patent

active

055594514

ABSTRACT:
In a push-pull type logic apparatus including a push-pull buffer formed by two bipolar transistors, a control circuit for turning ON one of the bipolar transistors and turning OFF the other, and a voltage clamp circuit for clamping the voltage of the base of at least one of the bipolar transistors, a clamp releasing circuit is provided for releasing the clamp operation of the voltage clamp circuit when the corresponding bipolar transistor is turned ON. Also, a MOS transistor is connected between the collector and emitter of the corresponding bipolar transistor and is turned ON when the corresponding bipolar transistor is turned ON.

REFERENCES:
patent: 4845386 (1989-07-01), Ueno
patent: 4897564 (1990-01-01), Chen
patent: 5025456 (1991-06-01), Ota et al.
patent: 5038058 (1991-08-01), Wang
patent: 5107143 (1992-04-01), Ueno et al.
patent: 5254885 (1993-10-01), Ando
by T. Hagano et al., "What can Replace BiCMOS at Lower Supply Voltage Regime?", IEEE IEDM 92, pp. 393-396, 1992.

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