Comparison and Integration of Voltage and Charge Amplifiers for Capacitive ECG Measurements

doi:10.1109/TBME.2022.3195771

	Comparison and Integration of Voltage and Charge Amplifiers for Capacitive ECG Measurements
	Yijing Zhang 1,2; Lin Xu3,4,5 ; Myrthe van der Ven 3,6; Sotir Ouzounov 7; Mohammed Meftah 7; Massimo Mischi 3; Eugenio Cantatore 3; Pieter Harpe 3
	2023-02-01
发表期刊	IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING (IF:4.4[JCR-2023],4.8[5-Year])
ISSN	1558-2531
卷号	70 期号:2 页码:501-510
发表状态	已发表
DOI	10.1109/TBME.2022.3195771
摘要	Objective: Sensing with capacitive electrodes is of interest for long-term, comfortable bio-potential measurements (e.g., ECG). However, due to the small body-to-electrode capacitance (Ce), the design of the associated front-end amplifier remains a challenge. Both voltage amplifiers (VA) and charge amplifiers (CA) can be employed. While basic comparisons of both typologies were done before, this paper extends the comparison to their responses to artifacts (caused by motion or interference). Further, a VA-CA-switchable amplifier is proposed, allowing to adapt the amplifier type to different situations, and enabling to estimate the body-to-electrode capacitance Ce in a passive way. Methods: A VA-CA switchable amplifier was implemented in a 180 nm CMOS process. The responses to artifacts for VA and CA were studied by modelling, simulations and experiments using the custom IC. The proposed Ce estimation method was validated by electrical tests and in-vivo tests. Results: VAs are less affected by Ce variation artifacts, while CAs recover faster from triboelectricity artifacts. In a VA, these two artifacts are multiplicative and get modulated if they occur simultaneously, but in a CA they remain independent. Conclusion: The combined VA-CA amplifier has the potential for optimal amplifier selection according to the properties of the recorded signal, the value of Ce and the actual presence of artifacts. Moreover, it can estimate Ce without extra hardware. Significance: The proposed VA-CA switchable structure is superior to an individual VA or CA, thanks its adaptability to signal quality and artifacts, and it provides extra information on the body-to-electrode interface quality (Ce).
URL	查看原文
收录类别	SCI ; EI ; SCOPUS
来源库	IEEE
引用统计	正在获取...
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/211732
专题	信息科学与技术学院信息科学与技术学院_PI研究组_徐林组
作者单位	1.Eindhoven University of Technology, Eindhoven, MB, The Netherlands 2.Philips Research, Eindhoven, The Netherlands 3.Eindhoven University of Technology, The Netherlands 4.School of Information Science and Technology, ShanghaiTech University, China 5.Shanghai Engineering Research Center of Energy Efficiency and Custom AI IC, China 6.Máxima Medical Center, The Netherlands 7.Philips Research, The Netherlands
推荐引用方式 GB/T 7714	Yijing Zhang,Lin Xu,Myrthe van der Ven,et al. Comparison and Integration of Voltage and Charge Amplifiers for Capacitive ECG Measurements[J]. IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING,2023,70(2):501-510.
APA	Yijing Zhang.,Lin Xu.,Myrthe van der Ven.,Sotir Ouzounov.,Mohammed Meftah.,...&Pieter Harpe.(2023).Comparison and Integration of Voltage and Charge Amplifiers for Capacitive ECG Measurements.IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING,70(2),501-510.
MLA	Yijing Zhang,et al."Comparison and Integration of Voltage and Charge Amplifiers for Capacitive ECG Measurements".IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING 70.2(2023):501-510.