公开(公告)号：US10833691B1

公开(公告)日：2020-11-10

申请号：US16696463

申请日：2019-11-26

Applicant: BAE Systems Information and Electronic Systems Integration Inc.

Inventor： Cameron Huang ,  Randall M. White

IPC: H03M1/10

Abstract: An analog to digital converter is disclosed that is designed to receive a differential analog signal and includes a signal chopping circuit and a successive approximation register (SAR) coupled to the signal chopping circuit. The signal chopping circuit is designed to invert a polarity of the differential analog signal and includes a first switching circuit having a first transistor and a second switching circuit having a second transistor. A gate of the first transistor and a gate of the second transistor is each coupled to a same bootstrap capacitor. Coupling both switching circuits to the same bootstrap capacitor (as opposed to separate bootstrap capacitors) greatly frees up space on the die or chip.