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:
Mar. 13, 2012
Filed:
Jun. 07, 2010
Applicants:
Fang-shi Jordan Lai, Chia-Yi, TW;
Yung-fu Lin, Hsinchu, TW;
Kuo-ming Wang, Hsinchu, TW;
Hsu-feng Hsueh, Tainan, TW;
Cheng Yen Weng, Hsinchu, TW;
Inventors:
Fang-Shi Jordan Lai, Chia-Yi, TW;
Yung-Fu Lin, Hsinchu, TW;
Kuo-Ming Wang, Hsinchu, TW;
Hsu-Feng Hsueh, Tainan, TW;
Cheng Yen Weng, Hsinchu, TW;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M 1/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
Mechanisms to calibrate a digital to analog converter (DAC) of an SDM (sigma delta modulator) are disclosed. An extra DAC element in addition to the DAC is used to function in place of a DAC element under calibration. A signal (e.g., a random sequence of −1 and +1) is injected to the DAC element under calibration, and the estimated error and compensation are acquired.