Analysis of Output Ripple Shape and Amplitude in Chopper Instrumentation Amplifier

被引：6

作者：

Lin, Tsz Ngai ^{[1
]}

Wang, Bo ^{[1
]}

Bermak, Amine ^{[1
]}

机构：

[1] Hamad Bin Khalifa Univ, Coll Sci & Engn, Div Informat & Comp Technol, Doha, Qatar

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS | 2022年 / 69卷 / 02期

关键词：

Shape; Instruments; Resistors; Choppers (circuits); Transconductance; Estimation; Circuits and systems; Capacitively-coupled chopper-based instrumentation amplifier; CCIA; chopper; instrumentation amplifier; ripple formation; ripple shape; ripple reduction; CMOS;

D O I：

10.1109/TCSII.2021.3098225

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this brief, we analyzed the output ripple in a capacitively-coupled chopper-based instrumentation amplifier (CCIA). Our analysis found that the shape and amplitude of the output ripple of the CCIA are determined by five design parameters, namely amplifier offset, transconductance, chopping frequency, Miller compensation capacitance, and the nulling resistor. With different design specifications, the CCIA ripple appears in four different shapes, including triangular ripple, RC-settling ripple, square ripple, and step-change ripple. These findings are verified by the silicon results. As the cause of each ripple shape varies, this analysis serves as a guideline for designing practical chopper-based amplifiers and their corresponding ripple reduction techniques.

引用

页码：299 / 303

页数：5

共 13 条

[1] A micropower chopper-stabilized operational amplifier using a SC notch filter with synchronous integration inside the continuous-time signal path [J].