Lock-in integration for detection of tiny bioimpedance variations

被引：0

作者：

Priide, Eiko ^{[1
]}

Annus, Paul ^{[1
]}

Metshein, Margus ^{[1
]}

Land, Raul ^{[1
]}

Martens, Olev ^{[1
]}

Min, Mart ^{[1
]}

机构：

[1] Tallinn Univ Technol, Thomas Johann Seebeck Dept Elect, Tallinn, Estonia

来源：

2018 16TH BIENNIAL BALTIC ELECTRONICS CONFERENCE (BEC) | 2018年

基金：

欧盟地平线“2020”;

关键词：

bioimpedance; dynamic range; synchronous measurement; lock-in detection; CENTRAL BLOOD-PRESSURE;

D O I：

暂无

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：

It is often desirable to detect tiny variations on top of larger static base value. Synchronous or lock-in measurement related problems are discussed in the current paper, and new solution is proposed for detection of bioimpedance variations. Proposed method is believed to be simpler, and more robust compared to known solutions. In the heart of the method is lock in integrator, used as differentiating peak detector. The base component of the signal is rejected, giving better dynamic range for the information carrying variable component of the bioimpedance due to the apparent differentiation. Reduction of the additive off band signals and noise is considered as well.

引用

页数：4

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