Level shifter

Details Level shifter Level shifter

2006-02-21

2006-02-21

Tan, Vibol (Department: 2819)

Electronic digital logic circuitry

Interface

Logic level shifting

C326S081000, C326S119000, C326S121000, C326S063000, C327S333000, C327S427000

Reexamination Certificate

active

07002371

ABSTRACT:
A level shifter with cross coupled inverters having different threshold voltages. The output of the level shifter is pulled to a known voltage state during power up. In some examples, one of the inverters includes an additional N-channel transistor wherein the threshold voltage is greater the threshold voltage of the other inverter due to the additional transistor.

REFERENCES:
patent: 6342802 (2002-01-01), Forehand
patent: 6512401 (2003-01-01), Clark et al.
patent: 6556061 (2003-04-01), Chen et al.
patent: 6600679 (2003-07-01), Tanzawa et al.
patent: 6614283 (2003-09-01), Wright et al.
patent: 6822479 (2004-11-01), Rosen
patent: 2003/0112041 (2003-06-01), Clark et al.
patent: 0 608 489 (1993-10-01), None
patent: 1 191 694 (2001-08-01), None
U.S. Appl. No. 10/660,847, filed Sep. 12, 2003 entitled “Level Shifter” and assigned to assignee hereof.

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