摘要
研究磁流体薄膜在可调谐光滤波器中应用的过程中,携带有用信息的光信号是微弱信号,很容易被淹没在很强的噪声或其他干扰的背景中,因此必须通过微弱信号检测技术将经过光电检测器转换后的微弱电信号提取出来。本文完成了利用锁相放大器进行有用信号提取的微弱信号检测系统的设计,主要由交流放大器、带通滤波器、相敏检波器、低通滤波器、直流放大器、移相器等组成。
During the research of the application of magnetic fluid film in tunable optical filter, the light signal that carries useful information is a weak signal, which is very easily to be submerged in the background of strong noise or other disturbances, therefore it is necessary to extract the weak electrical signal, which is conversed by the photoelectric detector, through the weak signal detection technology. In this paper, a weak signal detection system is designed, which is based on the phase lock amplifier. The system is composed of AC amplifier, band-pass filter, phase sensitive detector, low pass filter, DC amplifier, phase shifter and so on.
出处
《电子测试》
2015年第10X期1-3,共3页
Electronic Test
基金
2013年天津天狮学院校级科研项目资助
项目名称:磁流体薄膜在可调谐光滤波器中的应用研究
项目编号:K13004
关键词
锁相放大器
微弱信号检测
相敏检测
Lock-in Amplifier
Weak Signal detection
Phase sensitive detector
