Level shifter

Details Level shifter Level shifter

2008-02-14

2010-06-22

Barnie, Rexford N (Department: 2819)

Electronic digital logic circuitry

Interface

Current driving

C326S068000, C327S108000

Reexamination Certificate

active

07741872

ABSTRACT:
A level shifter for shifting an input signal to an output signal. The level shifter includes an input buffer biased a first voltage and a ground voltage; an output buffer and a level-processing unit both biased between a second voltage and the ground voltage; and a voltage-drop unit coupled to the level-processing unit and biased between the first voltage and the second voltage. While the first voltage is in an OFF state and the second voltage is switched on, the voltage-drop unit provides an initializing voltage for the level-processing unit according to the second voltage to shift the input signal to provide the output signal.

REFERENCES:
patent: 5786711 (1998-07-01), Choi
patent: 2002/0009013 (2002-01-01), Lee
patent: 2005/0270066 (2005-12-01), Kozawa

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