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:
Aug. 23, 2022
Filed:
Dec. 24, 2020
Industrial Technology Research Institute, Hsinchu, TW;
Yung-Hui Chung, Hsinchu, TW;
Qi-Feng Zeng, Pingtung County, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A successive approximation register analog-to-digital converter (SAR ADC) with calibration function and a calibration method thereof are provided. The SAR ADC has at least one capacitor digital-to-analog converter (CDAC), having Nd capacitors corresponding to Nd bits; and a controller. The calibration method includes: coupling the capacitors of an i-th to an (Nd−1)-th bit to a first reference voltage, and generating a first digital code based an operation of the capacitors of an (i−1)-th bit to a 0-th bit; coupling the capacitors of an (i+1)-th bit to the (Nd−1)-th bit to the first reference voltage, coupling the capacitor of the i-th bit to a second reference voltage, and generating a second digital code based on the operation of the capacitors of the (i−1)-th bit to the 0-th bit; generating a capacitor weight of the capacitor of the i-th bit; and calibrating the SAR ADC based on the capacitor weight.