BiCMOS logic circuit with bipolar base clamping

Details BiCMOS logic circuit with bipolar base clamping BiCMOS logic circuit with bipolar base clamping

1994-09-26

1997-09-23

Westin, Edward P.

Electronic digital logic circuitry

Accelerating switching

Bipolar transistor

326 84, H03K 170412

Patent

active

056708939

ABSTRACT:
The invention provides a BiCMOS logic gate circuitry comprising: input and output terminals: an output driving section including two bipolar transistors in the form of totem pole connection between a high voltage line and a low voltage line in which an intermediate point between the two bipolar transistors is connected to the output terminal; a base driving section including a plurality of MOS transistors and being connected to an input terminal for receiving an input signal and connected to bases of the bipolar transistors; and a base clamping section including at least one clamping circuit being connected to at least one of the bipolar transistors through its base for restricting a base potential of the at least one bipolar transistor in the vicinity of the same potential as a base-emitter forward bias at which the bipolar transistor turns ON so as to reduce the necessary time for charging a parasitic capacitance of the base of the at least one bipolar transistor.

REFERENCES:
patent: 3641368 (1972-02-01), Gamble et al.
patent: 4598213 (1986-07-01), Marley et al.
patent: 4616146 (1986-10-01), Lee et al.
patent: 4719373 (1988-01-01), Masuda et al.
patent: 4825108 (1989-04-01), Burton et al.
patent: 5059821 (1991-10-01), Murabayashi et al.
patent: 5166551 (1992-11-01), Kamuro
patent: 5343092 (1994-08-01), Dhong et al.
T. Nagano et al., "What Can Replace BiCMOS at Lower Supply Voltage Regime?", IEEE, 1992, pp. 393-396.

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