A Low-Power Low-Noise Biomedical Instrumentation Amplifier Using Novel Ripple-Reduction Technique

被引：0

作者：

Zhou, Yizhao ^{[1
]}

Zhao, Menglian ^{[1
]}

Dong, Yangtao ^{[1
]}

Wu, Xiaobo ^{[1
]}

Tang, Lihan ^{[1
]}

机构：

[1] Zhejiang Univ, Inst VLSI Design, Hangzhou, Zhejiang, Peoples R China

来源：

2018 IEEE BIOMEDICAL CIRCUITS AND SYSTEMS CONFERENCE (BIOCAS): ADVANCED SYSTEMS FOR ENHANCING HUMAN HEALTH | 2018年

基金：

中国国家自然科学基金;

关键词：

capacitively-coupled chopper instrumentation amplifier; low-power low-noise; Ripple-reduction technique; ping-pong auto-zeroing; high input impedance; noise efficiency factor;

D O I：

暂无

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This paper presents a low-power low-noise capacitively-coupled chopper instrumentation amplifier (CCIA), which is suitable for biomedical applications such as EEG, ECG and neural recoding. A novel ripple-reduction technique combined with ping-pong auto-zeroing is employed to suppress the ripple at the output of the instrumentation amplifier (IA) by the up-modulated amplifier offset and flicker noise. By using a positive feedback loop in the IA, the IA's input impedance is increased. The complete CCIA is simulated in a standard 0.18 mu m CMOS process. The simulated result shows the IA consumes several mu A current at 1.8 V supply. The equivalent input noise power spectrum density (PSD) is 54 nV/root Hz and the noise efficiency factor (NEF) achieves 4.05 within 1 kHz, while the equivalent input noise PSD is 55.4 nV/root Hz and NEF is 4.15 within 10 kHz. And the input impedance is about 100M Omega.

引用

页码：61 / 64

页数：4