CMOS output buffer circuit

Details CMOS output buffer circuit CMOS output buffer circuit

2006-03-21

2006-03-21

Nguyen, Long (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C327S108000, C327S170000

Reexamination Certificate

active

07015731

ABSTRACT:
A CMOS output buffer circuit comprises an input unit, a compensation control unit, a first switching unit and a second switching unit. The input unit outputs a data signal in response to a stop signal for determining transmission of the data signal. The compensation control unit determines a power voltage level with reference to the stop signal and the data signal when the data signal is transmitted, and outputs a plurality of compensating signals depending on the power voltage level. The first switching unit including a driving unit driven by the data signal outputted from the input unit and a compensation driving unit driven by combination of the data signal and the plurality of compensating signals compensates change of the power voltage level to output current. The second switching unit operated complementarily with the first switching unit outputs current. Accordingly, the CMOS output buffer circuit supplies a predetermined output current regardless change of a power voltage, thereby reducing power consumption and minimizing overshoot/undershoot noise to stabilize a power supplied to a device.

REFERENCES:
patent: 5773999 (1998-06-01), Park et al.
patent: 6011416 (2000-01-01), Mizuno et al.
patent: 6351157 (2002-02-01), Sharpe-Geisler
patent: 09-270698 (1997-10-01), None

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