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
收藏
页码：61 / 64
页数：4
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