公开(公告)号：US10763886B1

公开(公告)日：2020-09-01

申请号：US16545058

申请日：2019-08-20

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Subramanian Jagdish Narayan ,  Chandana Krishna

IPC: H03M3/00 ,  H03M1/68 ,  H03M1/16 ,  H03M1/44

Abstract: A multi-stage analog-to-digital converter includes a signal input terminal, a first stage analog-to-digital converter, a digital-to-analog converter; a second stage analog-to-digital converter, and dither circuitry. The first stage analog-to-digital converter includes an input coupled to the signal input terminal. The digital-to-analog converter includes an input coupled to an output of the first stage analog-to-digital converter, and an input coupled to the signal input terminal. The second stage analog-to-digital converter includes a first input coupled to an output of the digital-to-analog converter. The dither circuitry is coupled to a second input of the second stage analog-to-digital converter, and is configured to provide a dither signal to the second stage analog-to-digital converter during selection of fewer than all bits of a digital value of a residue signal received from the digital-to-analog converter.