Level shift circuit

Details Level shift circuit Level shift circuit

2009-02-10

2010-12-07

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

C326S062000, C326S081000

Reexamination Certificate

active

07847612

ABSTRACT:
A level shift circuit includes: a first transistor coupled to a first reference voltage for receiving a first voltage input signal; a second transistor coupled to a second reference voltage; a first diode-connected transistor coupled between the second transistor and the first diode-connected transistor; a third transistor coupled to the first reference voltage and the second transistor, for receiving a second voltage input signal, wherein the first voltage input signal is an inverse version of the second voltage input signal; a fourth transistor coupled to the second reference voltage and the first transistor; a second diode-connected transistor coupled between the fourth transistor and the third transistor; and a fifth transistor coupled to the second voltage input signal, the first reference voltage, and the fourth transistor, wherein a level-shifted output signal corresponding to the first voltage input signal is generated at an output node of the fourth transistor.

REFERENCES:
patent: 5406141 (1995-04-01), Yero et al.
patent: 5698993 (1997-12-01), Chow
patent: 6002290 (1999-12-01), Avery et al.
patent: 6130556 (2000-10-01), Schmitt et al.
patent: 6580291 (2003-06-01), Lutley
patent: 7161387 (2007-01-01), Yamasaki et al.
patent: 7215146 (2007-05-01), Khan
patent: 7425860 (2008-09-01), Nomura
patent: 7436213 (2008-10-01), Nojiri

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