摘要
在光电和通信领域,有用的信号常常淹没在背景强噪声里。本文基于相敏检波的原理,设计了以CD4052开关乘法器为核心的锁定放大器,能够对强噪声背景下的微弱信号进行检测,测量出频率已知的微弱正弦信号的幅度。
In the field of photoelectricity and communication,useful signals are often submerged in strong background noise.Based on the principle of phase sensitive detection(PSD),a lock-in amplifier with CD4052 switch multiplier as the core is designed in this paper.It can detect the weak signal in the background of strong noise and measure the amplitude of the weak sine signal with known frequency.
作者
邵文逸
徐伟
Shao Wenyi;Xu Wei(School of Electronics and Information Engineering,Nanjing University of Information Science&Technology,Nanjing Jiangsu,210044)
出处
《电子测试》
2020年第11期25-26,共2页
Electronic Test
基金
江苏省大学生创新创业项目(201810300054Y)。
关键词
锁相放大器
微弱信号
开关乘法器
Phase-locked amplifier
Weak signal
Switched multiplier
