BiCMOS tri-state output buffer

Details BiCMOS tri-state output buffer BiCMOS tri-state output buffer

1990-12-14

1992-10-06

Hudspeth, David

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307446, 307570, H03K 19017

Patent

active

051534649

ABSTRACT:
An improved tri-state output buffer of the type that includes an output stage comprising a pair of bipolar transistors in a totem-pole configuration. A CMOS predriver arrangement includes a circuit configuration for selectively adjusting the resistance between the base and the emitter of the source-follower output transistor. The predriver protects the source-follower from harmful bias effects by selectively adjusting the resistance in the emitter-to-base path of the source-follower.

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G. J. Gaudenzi & D. C. Reedy, "Emitter Follower Reverse Bias Clamp", IBM Technical Bulletin vol. 26, No. 7B Dec. 1983.

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