A simple digital phase-sensitive detector using AVR microcontroller

被引：6

作者：

Nooruddin, Mehbub A. K. ^{[1
]}

Roy, Subhasish ^{[1
]}

机构：

[1] Visva Bharati, Dept Phys, Santini Ketan 731235, W Bengal, India

来源：

AMERICAN JOURNAL OF PHYSICS | 2020年 / 88卷 / 02期

关键词：

LOCK-IN AMPLIFIER;

D O I：

10.1119/10.0000376

中图分类号：

G40 [教育学];

学科分类号：

040101 ; 120403 ;

摘要：

We have described a simple and inexpensive digital phase-sensitive detector using a low-cost AVR microcontroller. To store a large number of data, we have added external memory (RAM) to the microcontroller. A message passing interface daemon-based software has been implemented to control the whole operation. Performance of the system has been tested using precise signals generated through a D/A converter controlled by an 8085 microprocessor. The phase resolution of the system has been reported to be better than 0.1 degrees. This phase-sensitive detector would be very useful for low-budget laboratories that deal with low-frequency AC signal applications.

引用

页码：153 / 158

页数：6

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