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US Patent 7639073 Switched-capacitor amplifier with improved reset phase

Patent 7639073 was granted and assigned to Omnivision Technologies, Inc. on December, 2009 by the United States Patent and Trademark Office.

Overview Structured Data Issues Contributors

Is a

Patent

Patent attributes

Current Assignee

Omnivision Technologies, Inc.

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

76390730

Patent Inventor Names

Haidong Guo0

Yu-Shen Yang0

Tiejun Dai0

Chieh-Chien Lin0

Liping Deng0

Date of Patent

December 29, 2009

Patent Application Number

119418690

Date Filed

November 16, 2007

Patent Primary Examiner

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Henry K Choe

Patent abstract

A switch-capacitor (“SC”) amplifier includes a two-stage operational amplifier (“OP-AMP”), an input SC network, and a feedback SC network. The two-stage OP-AMP includes a first OP-AMP stage having an output coupled to an input of a second OP-AMP stage. The input SC network is coupled to an input of the first OP-AMP stage. The feedback SC network is configured to selectively couple the output of the first OP-AMP stage to the input of the first OP-AMP stage during a first phase of operation of the SC amplifier and to couple an output of the second OP-AMP stage to the input of the first OP-AMP stage during a second phase of operation of the SC amplifier.