The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 22, 2011
Filed:
Aug. 20, 2008
Young Kyun Cho, Daejeon, KR;
Young Deuk Jeon, Daejeon, KR;
Chong Ki Kwon, Daejeon, KR;
Jong Dae Kim, Daejeon, KR;
Young Kyun Cho, Daejeon, KR;
Young Deuk Jeon, Daejeon, KR;
Chong Ki Kwon, Daejeon, KR;
Jong Dae Kim, Daejeon, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Abstract
Provided is a dual sampling/pixel gain amplifier (CDS/PxGA) circuit with a shared amplifier, and more particularly, to a dual CDS/PxGA circuit for adjusting a gain of an amplifier based on capacitance. The dual CDS/PxGA circuit comprises: a first sampler for sampling a reset level and a data level of a first pixel; a second sampler for sampling a reset level and a data level of a second pixel; and an operational amplifier for receiving sampling values from the first and second samplers, calculating output signals of the first and second pixels using the sampling values, and amplifying the calculated output signals. Thus, it is possible to reduce a speed of an operational amplifier by using the dual CDS/PxGA structure, reduce power consumption by sharing the operational amplifier, and obtain a variable gain of a wide range by adjusting capacitance using a capacitor array.