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:
Dec. 03, 2013
Filed:
Sep. 14, 2012
Yung-hui Chung, Hsinchu, TW;
Meng-hsuan Wu, Taipei, TW;
Yung-Hui Chung, Hsinchu, TW;
Meng-Hsuan Wu, Taipei, TW;
Mediatek Inc., Hsin-Chu, TW;
Abstract
A SAR ADC converting an analog signal into a digital signal having N bits counting from a most significant bit to a least significant bit includes a comparator comparing a positive component with a negative component of the analog signal, two CDACs and a logic circuit. For at least one i-th bit cycle of N bit cycle except a least significant bit cycle, one of a pair of capacitors relating to (i+1)-th bit respectively arranged in the two CDACs is switched according to a first comparing result of the comparator. After one of the pair of capacitors is switched, the comparator compares the positive component with the negative component of the analog signal again and generates a second comparing result. Then whether each one of capacitors relating to i-th bit in the two CDAC is to be switched is determined according to the first and the second comparing result.