公开(公告)号：US11444634B2

公开(公告)日：2022-09-13

申请号：US17315571

申请日：2021-05-10

Applicant: MEDIATEK INC.

Inventor： Chin-Yu Lin ,  Ying-Zu Lin ,  Chih-Hou Tsai ,  Chao-Hsin Lu

IPC: H03M1/38 ,  H03M1/08 ,  H03M1/12 ,  H03M1/14 ,  H03M1/80

Abstract: A time-interleaved noise-shaping successive-approximation analog-to-digital converter (TI NS-SAR ADC) is shown. A first successive-approximation channel has a first set of successive-approximation registers, and a first coarse comparator operative to coarsely adjust the first set of successive-approximation registers. A second successive-approximation channel has a second set of successive-approximation registers, and a second coarse comparator operative to coarsely adjust the second set of successive-approximation registers. A fine comparator is provided to finely adjust the first set of successive-approximation registers and the second set of successive-approximation registers alternately. A noise-shaping circuit is provided to sample residues of the first and second successive-approximation channels for the fine comparator to finely adjust the first and second sets of successive-approximation registers.

公开(公告)号：US11043958B2

公开(公告)日：2021-06-22

申请号：US16990016

申请日：2020-08-11

Applicant: MEDIATEK INC.

Inventor： Chin-Yu Lin ,  Ying-Zu Lin ,  Chih-Hou Tsai ,  Chao-Hsin Lu

IPC: H03M1/38 ,  H03M1/08 ,  H03M1/14 ,  H03M1/12 ,  H03M1/80

Abstract: A time-interleaved noise-shaping successive-approximation analog-to-digital converter (TI NS-SAR ADC) is shown. A first successive-approximation channel has a first set of successive-approximation registers, and a first coarse comparator operative to coarsely adjust the first set of successive-approximation registers. A second successive-approximation channel has a second set of successive-approximation registers, and a second coarse comparator operative to coarsely adjust the second set of successive-approximation registers. A fine comparator is provided to finely adjust the first set of successive-approximation registers and the second set of successive-approximation registers alternately. A noise-shaping circuit is provided to sample residues of the first and second successive-approximation channels for the fine comparator to finely adjust the first and second sets of successive-approximation registers.