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:
Jun. 19, 2018
Filed:
Jun. 08, 2015
China Electronic Technology Corporation, 24th Research Institute, Chongqing, CN;
Ting Li, Chongqing, CN;
Gangyi Hu, Chongqing, CN;
Hequan Jiang, Chongqing, CN;
Ruzhang Li, Chongqing, CN;
Zhengbo Huang, Chongqing, CN;
Yong Zhang, Chongqing, CN;
Guangbing Chen, Chongqing, CN;
Yuxin Wang, Chongqing, CN;
Dongbing Fu, Chongqing, CN;
CHINA ELECTRONIC TECHNOLOGY CORPORATION, 24TH RESEARCH INSTITUTE, Chongqing, CN;
Abstract
The present invention provides a high-precision analog-to-digital converter, includes a redundant weight capacitor array, a comparator, a code reestablishment circuit, a weight storage circuit and a control logic circuit. The redundant weight capacitor array collects input voltages and generates output voltages in a sampling stage. The comparator compares the output voltages of the redundant weight capacitor array. The code reestablishment circuit calculates an output code of the successive approximation type analog-to-digital converter according to the comparator output result and a capacitor weight in the weight storage circuit. The weight storage circuit stores the capacitor weight. The control logic circuit controls the sampling and conversion stages of the redundant weight capacitor array. The present invention also provides a DNL-based performance improvement method adapted to the analog-to-digital converter.