Level shifter circuit and semiconductor device having the same

Details Level shifter circuit and semiconductor device having the same Level shifter circuit and semiconductor device having the same

2010-04-08

2011-10-04

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

Reexamination Certificate

active

08030987

ABSTRACT:
A level shifter circuit includes a pull-up unit configured to pull up an output node to a second voltage level being higher than a first voltage level in response to an input signal swinging with an amplitude of the first voltage level, a pull-down unit configured to pull down the output node in response to the input signal, and a protection unit connected between the output node and the pull-down unit to prevent a voltage of the output node from being applied to the pull-down unit.

REFERENCES:
patent: 6614283 (2003-09-01), Wright et al.
patent: 6803801 (2004-10-01), Randazzo et al.
patent: 7183817 (2007-02-01), Sanchez et al.
patent: 7310012 (2007-12-01), Chen
patent: 7541837 (2009-06-01), Lines
patent: 2008/0315936 (2008-12-01), Mauthe et al.

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