Low-leakage level shifter with integrated firewall and method

Details Low-leakage level shifter with integrated firewall and method Low-leakage level shifter with integrated firewall and method

2008-03-11

2008-03-11

Chang, Daniel (Department: 2819)

Electronic digital logic circuitry

Interface

Logic level shifting

C326S063000, C327S333000

Reexamination Certificate

active

11460885

ABSTRACT:
A level shifter may reduce leakage current and provide firewall protection between circuits of different voltage domains when one voltage domain is in a standby mode. The level shifter may either couple or decouple input circuitry from a reference voltage in response to a firewall enable signal, may translate signals between a first voltage domain and a second voltage domain when the firewall enable signal is deasserted, and may generate an output signal having a predetermined one of either a high or low state when the firewall enable signal is asserted.

REFERENCES:
patent: 6362653 (2002-03-01), Coughlin, Jr. et al.
patent: 6501298 (2002-12-01), Terletzki
patent: 6753698 (2004-06-01), Carpenter et al.
patent: 7199617 (2007-04-01), Schrom et al.
patent: 2005/0285623 (2005-12-01), Jahan et al.
patent: WO 98/20612 (1998-05-01), None

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