Electronic digital logic circuitry – Signal sensitivity or transmission integrity – Signal level or switching threshold stabilization
Reexamination Certificate
2008-06-24
2008-06-24
Tan, Vibol (Department: 2819)
Electronic digital logic circuitry
Signal sensitivity or transmission integrity
Signal level or switching threshold stabilization
C326S034000, C326S095000, C326S098000, C327S537000, C327S534000
Reexamination Certificate
active
07391232
ABSTRACT:
An apparatus for extending lifetime reliability of CMOS circuitry includes a logic high supply rail, a logic low supply rail, and a virtual supply rail. In an intense recovery mode of operation, a first switching device is rendered nonconductive so as to isolate the virtual supply rail from the one of the logic high supply rail and the logic low supply rail, and the second switching device is rendered conductive so as to equalize the voltage on the virtual supply rail and the other of the logic high supply rail and the logic low supply rail. At least one device within the circuitry provides one of the logic high voltage and the logic low voltage to a gate terminal of an FET within the circuitry, with a source terminal of the FET coupled to the virtual supply rail, such that the FET is subjected to a reverse bias condition.
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Bose Pradip
Shin Jeonghee
Zyuban Victor
Cantor & Colburn LLP
International Business Machines - Corporation
Tan Vibol
Yamonaco Lisa
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