An Adaptive Common -Mode Cancellation Biopotential Amplifier for Two -Electrode Dynamic ECG Recording

被引：0

作者：

Zhang, Zhong ^{[1
]}

Xie, Zhangyuan ^{[1
]}

Yu, Qi ^{[1
]}

Wu, Kejun ^{[1
]}

Li, Jing ^{[1
]}

Ning, Ning ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 611731, Peoples R China

来源：

2024 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, ISCAS 2024 | 2024年

基金：

中国国家自然科学基金;

关键词：

Terns Commonmode interference; biopotential amplifier; two-electrode; ECG recording; low power consumption;

D O I：

10.1109/ISCAS58744.2024.10558648

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

This paper presents a novel adaptive common -mode Cancellation Biopotential Amplifier for portable ECG recording. The amplifier features a converge-free adaptive common -mode cancellation (ACMC) loop with nine MOSFETs, two capacitors, two pseudo resistances and one unity gain buffer. Through periodic detecting and compensating common charge induced by common -mode interference (CMI), ACMC circuit is able to suppressed amplitude of CMI over 100x without requiring a convergence process or additional common -mode references. To verify the design, a prototype is fabricated in 0.18)tm CMOS process with a 1.8 V supply. Under power consumption of 16.7pAV, measurement results show that 2OVpp CMI with a frequency range spanning from 2011z to 80Hz is suppressed below 200mVpp that guarantees the normal operation of subsequent instrument amplifier. Also, the input -referred noise (IRN) within 100Ilz and common -mode rejection ratio at 501Iz are 1.2607,,,, and 91dB, respectively.

引用

页数：5

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