Voltage level shifter

Details Voltage level shifter Voltage level shifter

2007-03-28

2008-12-23

Barnie, Rexford (Department: 2819)

Electronic digital logic circuitry

Interface

Logic level shifting

C327S333000

Reexamination Certificate

active

07468615

ABSTRACT:
A high-speed, area-efficient level shifter includes transistors having a variety of oxide thicknesses. The level shifter has a protection circuit stage, and a current mirror stage that allows the level shifter to perform over a wide voltage range at a high frequency. The level shifter maintains rise time, fall time, and duty cycle over a wide range of input and output voltage levels.

REFERENCES:
patent: 6556061 (2003-04-01), Chen et al.
patent: 7053656 (2006-05-01), Seo
patent: 7183804 (2007-02-01), Icking et al.
patent: 7199617 (2007-04-01), Schrom et al.
patent: 2004/0061525 (2004-04-01), Tamaki
patent: 2004/0070421 (2004-04-01), Kapoor
Samad, Maheen A., “Voltage Level Shifter Using Current Mirroring”, U.S. Appl. No. 10/401,381, filed Mar. 27, 2003, pp. 1-23; available from Xilinx, Inc., 2100 Logic Drive, San Jose, CA 95124.

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