公开(公告)号：US20170179970A1

公开(公告)日：2017-06-22

申请号：US15369175

申请日：2016-12-05

Applicant: Analog Devices Global

Inventor： ZHAO LI ,  Hajime SHIBATA ,  Trevor Clifford CALDWELL ,  Yunzhi DONG ,  Jialin ZHAO ,  Richard E. SCHREIER ,  Victor KOZLOV ,  David Nelson ALLDRED ,  Prawal Man SHRESTHA

IPC: H03M1/10 ,  H03M3/00 ,  H03M1/06 ,  H03M1/34 ,  H03M1/12

CPC classification number: H03M1/1009 ,  H03M1/0626 ,  H03M1/066 ,  H03M1/1245 ,  H03M1/34 ,  H03M3/388 ,  H03M3/422

Abstract: An analog-to-digital converter (ADC) is a device that can include a reference shuffler and a loop filter. An ADC can achieve better performance with incremental adjustment of a pointer of the reference shuffler, changing coefficients of the loop filter, and storing calibration codes of the ADC in a non-volatile memory. By incrementally adjusting a pointer of the reference shuffler, a calibration can be performed more efficiently than with a random adjustment of the pointer. By temporarily changing the loop filter coefficients, a greater amount of activity can be introduced into the loop filter. This activity can allow the calibration to proceed more efficiently. By storing the calibration codes in a non-volatile memory, a search space for calibration codes can be reduced. Thus, a calibration can occur more quickly, and the calibration itself can be improved.