Logic circuit with controlled current supply output

Details Logic circuit with controlled current supply output Logic circuit with controlled current supply output

1993-04-22

1995-06-27

Hudspeth, David R.

Electronic digital logic circuitry

Accelerating switching

326 85, H03K 1901

Patent

active

054283027

ABSTRACT:
A semiconductor logic circuit apparatus includes a plurality of logic circuits each including complementary field effect transistors, and a plurality bipolar transistors associated with the respective ones of the logic circuits. When any one of the outputs of the logic circuits becomes high, an associated bipolar transistor becomes conductive to cause an output terminal of the apparatus to be charged from a voltage supply. With all the outputs of the logic circuits being low, all of the bipolar transistors are non-conductive, and a current supply coupled between the output terminal and ground dicharges charge on the output terminal.

REFERENCES:
patent: 4999519 (1991-03-01), Kitsukawa et al.
patent: 5015880 (1991-05-01), Drake et al.
patent: 5017812 (1991-05-01), Wu
patent: 5086240 (1992-02-01), Neu
patent: 5278465 (1994-01-01), Hamada
Multi-Emitter BiCMOS Logic circuit family, by G. Boudon, et al. 1990 Symposium on VLSI Circuits pp. 665-669. Jun. 1990.

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