Level shifter circuit

Details Level shifter circuit Level shifter circuit

2007-02-01

2008-07-08

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

C326S081000

Reexamination Certificate

active

07397297

ABSTRACT:
A level shifter circuit, which includes a Schmitt trigger function, shifts voltage of a high level signal into a low voltage and shifts a signal at an intermediate value of an input voltage. The level shifter circuit includes an input terminal connected to low and high voltage circuits. The low voltage circuit outputs a low drive voltage or ground voltage. The high voltage circuit outputs a high drive voltage or a high reference voltage, which is supplied to an RS latch circuit via a potential adjustment circuit at a level equal to an output potential at the low voltage circuit. The RS latch circuit uses the output of the potential adjustment circuit when the input voltage shifts to a high level and uses the output of the low voltage circuit when the input voltage shifts to a low level.

REFERENCES:
patent: 6583647 (2003-06-01), Kim et al.
patent: 6919743 (2005-07-01), Tobita
patent: 2004/0160258 (2004-08-01), Tobita
patent: 2005/0073349 (2005-04-01), Li
patent: 10-135818 (1998-05-01), None
patent: 2001-293865 (2001-10-01), None
patent: 2002-253319 (2002-09-01), None

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