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:
May. 08, 2007
Filed:
May. 21, 2004
Kuangyu LI, Glendale, CA (US);
Song-nien Tang, Hsinchu, TW;
Jackie K. Cheng, Irvine, CA (US);
Zaw Min Soe, Encinitas, CA (US);
Kuangyu Li, Glendale, CA (US);
Song-Nien Tang, Hsinchu, TW;
Jackie K. Cheng, Irvine, CA (US);
Zaw Min Soe, Encinitas, CA (US);
Wionics Research, Irvine, CA (US);
Abstract
Systems and methods for canceling static and dynamic DC offsets by combining a digital DC offset correction scheme with an analog DC offset correction scheme. A feedback-based digital DC offset correction scheme provides different adjustment levels for a plurality of discrete gain states and the analog DC offset correction scheme operates in different cancellation modes dependent on a frame structure. A digital DC offset correction scheme collects DC offset control information and provides adjustment levels. In addition, a negative-feedback based switchable high pass filter has a plurality modes of operation, where one mode of operation includes an all-pass filter.