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:
Jun. 26, 2007
Filed:
Jul. 20, 2004
Seema Varma, Sunnyvale, CA (US);
Ha Chu VU, San Jose, CA (US);
Kunhong Qu, Saratoga, CA (US);
William David Llewellyn, San Jose, CA (US);
Chungwai Benedict NG, San Francisco, CA (US);
Nghiem Nguyen, San Jose, CA (US);
Seema Varma, Sunnyvale, CA (US);
Ha Chu Vu, San Jose, CA (US);
Kunhong Qu, Saratoga, CA (US);
William David Llewellyn, San Jose, CA (US);
Chungwai Benedict Ng, San Francisco, CA (US);
Nghiem Nguyen, San Jose, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
An analog front-end (AFE) circuit may include a correlated double sampler (CDS) with a ping-pong architecture, and a ping-pong mismatch correction circuit. The CDS employs a ping data path during ping phases, and employs a pong data path during pong phases. The ping-pong mismatch correction circuit is arranged to correct a mismatch between a gain that is associated with the ping data path and a gain that is associated with the pong data path. Further, the ping-pong mismatch correction circuit is arranged to correct a mismatch between an offset that is associated with the ping data path and an offset that is associated with the pong data path.