Output buffer circuit having gate voltage control circuit of gat

Details Output buffer circuit having gate voltage control circuit of gat Output buffer circuit having gate voltage control circuit of gat

1994-12-23

1996-09-03

Westin, Edward P.

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Output switching noise reduction

H03K 190948

Patent

active

055527191

ABSTRACT:
The output buffer circuit according to the present invention comprises: a P-channel type output transistor which is provided between a first power supply terminal and an output terminal and receives an input signal at a gate thereof; an N-channel type transistor which is provided between the output terminal and a second power supply and has a gate connected to a drain of a gate current controlling transistor; a circuit for supplying the input signal to a source of the gate current controlling transistor; and a voltage control generation circuit which generates as a gate voltage of the gate current controlling transistor a first voltage value which is smaller than a value of the power supply voltage for a predetermined time, and further generates a second voltage value which is higher than the first voltage value after the elapse of the predetermined time.

REFERENCES:
patent: 5111076 (1992-05-01), Tarng
patent: 5194764 (1993-03-01), Yano et al.
patent: 5233238 (1993-08-01), Mattos
patent: 5237213 (1993-08-01), Tanoi

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