公开(公告)号：US09804573B1

公开(公告)日：2017-10-31

申请号：US15394454

申请日：2016-12-29

Applicant: Silicon Laboratories Inc.

Inventor： Brian G. Drost ,  Ankur Guha Roy

IPC: H03M1/12 ,  G04F10/00 ,  H03M1/16 ,  H03M1/18

CPC classification number: G04F10/005 ,  H03M1/0692 ,  H03M1/14 ,  H03M1/16 ,  H03M1/188 ,  H03M1/60

Abstract: A time-to-digital converter utilizes both coarse and fine quantizers and addresses mismatch by using redundant bits in the coarse time representation and the fine time representation. The redundant bits are compared and if the redundant bits are the same, no mismatch correction is required but if the redundant bits are different a correction is applied to correct the redundant portion of the coarse time information. The redundant portion includes the most significant bit generated by the fine quantizer and the least significant bit of the coarse quantizer. The correction adds to or subtracts from the redundant information.