Buffer circuit

Details Buffer circuit Buffer circuit

2006-03-28

2008-11-11

Cho, James H. (Department: 2819)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C326S033000, C326S034000, C326S086000

Reexamination Certificate

active

07449940

ABSTRACT:
A buffer circuit capable of switching between input mode and output mode includes a first transistor for outputting a prescribed voltage to an input/output terminal depending on a conductive state during the output mode of the buffer circuit, a pre-driver for controlling the conductive state of the first transistor during the output mode of the buffer circuit, and a power supply circuit for providing a first power supply to the pre-driver during the output mode of the buffer circuit and providing or blocking the first power supply to the pre-driver in accordance with an input voltage to the input/output terminal during the input mode of the buffer circuit.

REFERENCES:
patent: 5748011 (1998-05-01), Takahashi et al.
patent: 5933025 (1999-08-01), Nance et al.
patent: 6847248 (2005-01-01), Ajit
patent: 7049847 (2006-05-01), Kitazawa et al.
patent: 2003/0122606 (2003-07-01), Ajit et al.
patent: 2004/0212398 (2004-10-01), Kitazawa et al.
patent: 2004-328443 (2004-11-01), None
European Search Report dated Jul. 17, 2006.

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