基于Simulink的锁定放大器仿真技术的实现

摘要

锁相放大器是实现噪声中微弱信号参量测量的一种有效检测装置。该文介绍了锁定放大器的原理与实现方法,并利用MATLAB的Simulink工具箱对锁定放大器进行了建模和仿真。仿真结果表明,锁定放大器能很好地完成微弱信号测量。%Lock-in amplifier is an effective solution to detect weak signals.This paper attempts to introduce the principle of the LIA and also use the Simulink tools to modeling and simulate the LIA system.The result shows that LIA do well in detecting weak signals.