Level shifter including cascode sets

Details Level shifter including cascode sets Level shifter including cascode sets

2008-11-03

2010-12-07

Barnie, Rexford N (Department: 2819)

Electronic digital logic circuitry

Interface

Logic level shifting

C326S081000

Reexamination Certificate

active

07847590

ABSTRACT:
A device for shifting voltage levels includes an input stage, an output stage and multiple cascode sets connected between the input stage and the output stage. The input stage includes input transistors connected to a first voltage and an input for receiving an input signal. The output stage includes output transistors connected to a second voltage and an output for outputting an output signal having a voltage level different from a corresponding voltage level of the input signal. Each cascode set includes corresponding cascode transistors gated to a third voltage, which is between the first voltage and the second voltage, preventing excessive voltage across terminals of the input transistors and the output transistors.

REFERENCES:
patent: 5821800 (1998-10-01), Le et al.
patent: 2004/0090259 (2004-05-01), Randazzo et al.
patent: 2005/0275444 (2005-12-01), Khan et al.
patent: 2009/0115456 (2009-05-01), Chiang

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