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:
Jan. 31, 2012
Filed:
Jun. 28, 2007
Ha Chu VU, San Jose, CA (US);
Seema Varma, Sunnyvale, CA (US);
Ha Chu Vu, San Jose, CA (US);
Seema Varma, Sunnyvale, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A method and apparatus can be arranged with a correlated double sampler circuit (CDS) for processing an output signal from an imaging device such as a charge-coupled device (CCD) image sensor. The correlated double sampling (CDS) circuit is described that includes an amplifier and a reduced number of capacitors that are dynamically configured using a ping-pong architecture. The described ping-pong architecture has relaxed requirements for sampling points, minimized gain mismatch error, and offset mismatches can be easily managed. The ping-pong architecture is useful in digital imaging applications such as digital scanners, digital copiers, digital cameras, and digital camcorders, to name a few.