Output circuit comprising bipolar transistors for driving CMOS c

Details Output circuit comprising bipolar transistors for driving CMOS c Output circuit comprising bipolar transistors for driving CMOS c

1994-06-13

1995-02-28

Heyman, John S.

Miscellaneous active electrical nonlinear devices, circuits, and

Gating

Utilizing three or more electrode solid-state device

327109, 326 82, H03K 1760, H03K 500, H03K 190175

Patent

active

053940385

ABSTRACT:
An output circuit, having a plurality of bipolar transistors for driving a CMOS circuit, comprises an output level maintaining transistor connected between an output terminal of the output circuit and ground. The output level maintaining transistor maintains a level of the output terminal at a specific high potential by transmitting a current from the output terminal to the ground when the output circuit is outputting a high level signal to the output terminal, and the output level maintaining transistor is cut OFF when the output circuit is outputting a low level signal to the output terminal. Consequently, the output circuit according to the present invention reduces power consumption of the output circuit and avoids erroneous operation of the CMOS circuit.

REFERENCES:
patent: 3553486 (1971-01-01), Dow
patent: 4631422 (1986-12-01), Piasecki
patent: 4682050 (1987-07-01), Beranger et al.
patent: 4835420 (1989-05-01), Rosky

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