Single gate oxide I/O buffer with improved under-drive feature

Details Single gate oxide I/O buffer with improved under-drive feature Single gate oxide I/O buffer with improved under-drive feature

2007-03-20

2007-03-20

Tan, Vibol (Department: 2819)

Electronic digital logic circuitry

Interface

Supply voltage level shifting

C326S083000, C326S086000, C327S333000, C327S112000

Reexamination Certificate

active

10993054

ABSTRACT:
A high voltage buffer module used in an input/output buffer circuit coupled between a high voltage circuit and a low voltage circuit, operates between a first supply voltage and its complementary second supply voltage. A pull-up module, coupled between the first supply voltage and an output node, outputs the first supply voltage to the output node, in response to an input signal. A voltage detection circuit provides the pull-up module with at least one bias voltage selected from a predetermined set of voltage levels, wherein the voltage detection circuit selects the bias voltage upon detecting a reduction of the first supply voltage.

REFERENCES:
patent: 6018257 (2000-01-01), Hung et al.
patent: 6081132 (2000-06-01), Isbara
patent: 6333663 (2001-12-01), Lee
patent: 6388499 (2002-05-01), Tien et al.

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