Electrical transmission or interconnection systems – Switching systems – Plural switches
Reexamination Certificate
2007-11-05
2010-12-14
DeBeradinis, Robert L. (Department: 2836)
Electrical transmission or interconnection systems
Switching systems
Plural switches
Reexamination Certificate
active
07851947
ABSTRACT:
A circuit which selects a supply voltage from a plurality of voltage supplies is presented. The circuit includes a first transistor configured to select a first voltage supply, a second transistor configured to select a second voltage supply, a first parasitic current inhibitor coupled the first transistor, the first voltage supply, and the second voltage supply, where the first parasitic current inhibitor automatically utilizes the voltage supply providing the highest voltage for preventing a substrate current from flowing through a bulk node of the first transistor, and a second parasitic current inhibitor coupled the second transistor, the first voltage supply, and the second voltage supply, where the second parasitic current inhibitor automatically utilizes the voltage supply providing the highest voltage for preventing a substrate current from flowing through a bulk node of the second transistor.
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patent: 6847249 (2005-01-01), Brokaw
patent: 2008/0084195 (2008-04-01), Frew et al.
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International Search Report-PCT/US2008/082504, International Search Authority-European Patent Office-May 8, 2009.
Written Opinion-PCT/US08/082504, International Search Authority-European Patent Office-May 8, 2009.
Cassia Marco
Donovan Conor
Hadjichristos Aristotele
Lee Sang-Oh
DeBeradinis Robert L.
Hooks William M.
QUALCOMM Incorporated
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