Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2008-07-10
2010-06-22
Pascal, Robert (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C330S257000
Reexamination Certificate
active
07741911
ABSTRACT:
An operational amplifier includes a first stage and a second stage, the first stage for receiving two input signals and the second stage being coupled to the first stage, wherein the second stage includes a first part with a first output of the operational amplifier, and a second part with a second output of the operational amplifier. A method includes providing a first current to the first part of the second stage, and providing a second current to the second part of the second stage. The method further includes adjusting the first current based on a current consumption of the first part of the second stage, and adjusting the second current based on a current consumption of the second part of the second stage, wherein the sum of the first current and the second current is substantially constant.
REFERENCES:
patent: 7215199 (2007-05-01), Marholev
patent: 2009/0108934 (2009-04-01), Forejt
Chen Chih-Hung
Kao Shiau-Wen
Kuo Ming-Ching
Finnegan Henderson Farabow Garrett & Dunner LLP
Industrial Technology Research Institute
Nguyen Hieu P
Pascal Robert
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