Level shifter

Details Level shifter Level shifter

2004-12-29

2008-11-04

Le, Don P (Department: 2819)

Electronic digital logic circuitry

Interface

Logic level shifting

C326S081000

Reexamination Certificate

active

07446564

ABSTRACT:
A level shifter is disclosed, which has an input control circuit, a high-level voltage supply and a step-down circuit. The high-level voltage supply provides a high-level voltage source. The step-down circuit is coupled between the input control circuit and the high-level voltage supply circuit, and includes a high-level control device and a low-level control device. The high-level control device can provide a step-down function for protecting the low-level control device. The low-level control device is control to switch by the control signal or the inverted control signal, thereby driving the high-level voltage source to output.

REFERENCES:
patent: 5821800 (1998-10-01), Le et al.
patent: 5969542 (1999-10-01), Maley et al.
patent: 6064229 (2000-05-01), Morris
patent: 6487687 (2002-11-01), Blake et al.
patent: 6700407 (2004-03-01), Wert
patent: 6963226 (2005-11-01), Chiang
patent: 7053658 (2006-05-01), Blankenship et al.
patent: 2006/0091907 (2006-05-01), Khan

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