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:
Jul. 11, 2006
Filed:
May. 20, 2004
Applicants:
Neil Woodall, Newport Beach, CA (US);
G. Finn Wredenhagen, Toronto, CA;
Inventors:
Neil Woodall, Newport Beach, CA (US);
G. Finn Wredenhagen, Toronto, CA;
Assignee:
Pixelworks, Inc., Tualatin, OR (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M 1/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides an ADC apparatus and method for improving effective bit resolution and suppressing digital reconstruction artifacts with an anti-aliasing filter and an over-sampled input. ADC resolution can be increased by combining a dither signal with a sampled signal and then after digitization, filtering out the dithered signal. Designing a notch in the filter corresponding to the attenuation frequency attenuates residual effects.