High voltage tolerant input buffer operable in under-drive...

Details High voltage tolerant input buffer operable in under-drive... High voltage tolerant input buffer operable in under-drive...

2007-09-18

2007-09-18

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C327S379000

Reexamination Certificate

active

11236153

ABSTRACT:
An input buffer includes a signal passing module for generating a first output signal in response to the input signal based on a comparison between the input signal and a first supply voltage thereof; a regulating module having a first input terminal receiving the input signal and a second input terminal receiving the first output signal for generating a second output signal within a first predetermined voltage range; and a level down module for generating a third output signal within a second predetermined voltage range for the core circuitry in response to the second output signal. The input signal passes through the signal passing module with a substantial voltage drop when a voltage level of the input signal is substantially greater than the first supply voltage, and without a substantial voltage drop when the voltage level of the same is less than or equal to the first supply voltage.

REFERENCES:
patent: 5726944 (1998-03-01), Pelley, III et al.
patent: 5801563 (1998-09-01), McClure

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