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. 05, 2016
Filed:
Sep. 01, 2015
Applicant:
Mediatek Inc., Hsin-Chu, TW;
Inventors:
Frank Op 't Eynde, Wilsele, BE;
Chi-Lun Lo, Taoyuan County, TW;
Michael A. Ashburn, Groton, MA (US);
Assignee:
MediaTek Inc., Hsin-Chu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M 1/20 (2006.01); H03M 3/00 (2006.01); H03M 1/00 (2006.01); H03M 1/12 (2006.01); H03M 1/06 (2006.01);
U.S. Cl.
CPC ...
H03M 3/328 (2013.01); H03M 3/458 (2013.01); H03M 1/00 (2013.01); H03M 1/0641 (2013.01); H03M 1/12 (2013.01);
Abstract
Systems and methods for reducing spurious noise tones in sigma-delta analog-to-digital converters (ADCs) are described. A dither signal may be added to two differential input signals of a pseudo-differential sigma-delta ADC. The dither signal may be generated by a pseudo-random bit sequence generator and applied to two input buffers, which add the dither signal to received differential analog input signals. The dithered signals may be digitized by two independent sigma-delta ADCs and then subtracted to remove the dither signal from an overall digital output signal.