Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Reexamination Certificate
2011-01-11
2011-01-11
Nguyen, Ha Tran T (Department: 2829)
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
Reexamination Certificate
active
07868643
ABSTRACT:
An integrated circuit device comprises a first transistor having a gate coupled to an output of a first operational amplifier, a second transistor having a threshold voltage proportional to a threshold voltage of the first transistor, the second transistor having a gate coupled to an inverting input of a second operational amplifier, an output of the second operational amplifier coupled to an inverting input of the first operational amplifier, a first resistor coupled between the second transistor gate and the inverting input of the second operational amplifier, and a second resistor coupled between the output of the second operational amplifier and the inverting input of the second operational amplifier, a ratio of the second resistor to the first resistor selected based upon a ratio of a production distribution of a transistor source voltage offset to a production distribution of a transistor threshold voltage mismatch.
REFERENCES:
patent: 7365559 (2008-04-01), Colbeck
patent: 7605598 (2009-10-01), Kelly
Croce Paolo Del
Kadow Christoph
Infineon - Technologies AG
Nguyen Ha Tran T
Nguyen Tung X
Slater & Matsil L.L.P.
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