Comparative Study of CMOS Lock-In Amplifiers for Wideband Bioelectrical Impedance Measurements

被引：0

作者：

Palomeque-Mangut, David ^{[1
]}

Ausin, Jose L. ^{[1
]}

Duque-Carrillo, Francisco ^{[1
]}

机构：

[1] Univ Extremadura, Dept Elect Elect & Control Engn, Avda Elvas S-N, Badajoz 06006, Spain

来源：

23RD IEEE INTERNATIONAL CONFERENCE ON ELECTRONICS CIRCUITS AND SYSTEMS (ICECS 2016) | 2016年

关键词：

Lock-in amplifiers; sensor signal conditioning; FILTERS;

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：

In this paper, limitations of two-phases lock-in amplifiers (LIAs) in variable frequency applications are reported. Given those limitations, an alternative LIA architecture is described: the heterodyne LIA. Design strategies for improving general performance of heterodyne LIA without sacrificing power consumption have been described. Comparative simulations of both architectures have been carried out with MATLAB Simulink Heterodyne LIA architecture permits measuring signals in a wide range of frequencies with higher improvement in signal-to-noise ratio and simpler design than the conventional two-phases LIA architecture.

引用

页码：416 / 419

页数：4

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