Low cost Lock-in Amplifier Solutions

被引：0

作者：

Belea, Radu ^{[1
]}

Epure, Silviu ^{[1
]}

机构：

[1] DUNAREA DE JOS Univ Galati, Elect & Telecommun Dept, Galati, Romania

来源：

2017 IEEE 23RD INTERNATIONAL SYMPOSIUM FOR DESIGN AND TECHNOLOGY IN ELECTRONIC PACKAGING (SIITME) | 2017年

关键词：

LIA (lock-in amplifier); measuring channel; synchronization channel; PSD (phase sensitive detector); DDT (direct digital synthesis);

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：

The analog part of the lock-in amplifier consists in three units: the measuring channel, the synchronization channel and one or two PSD (phase sensitive detector) circuits. For low frequency applications, the PSD circuit can be build with ordinary operational amplifiers and CMOS multiplexers. The paper presents a study of the proposed PSD circuit and two examples: a conditioner for the LVDT (linear variable differential transformer) sensor, and an device which together with a laboratory DDT (direct digital synthesis) signal generator can measure the gain-frequency and phase-frequency diagrams (Bode diagrams) of an electric circuit.

引用

页码：118 / 121

页数：4

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