相关器及其性能测试分析

Analysis on the Test Performance of the Correlator

相关器是微弱信号检测仪器锁定放大器的核心部件,锁定放大器之所以有很强的抑噪能力,主要是靠相关器的消除噪声和排除干扰的优越性能。通过实验对一种相关器的性能进行了测试和分析,结果表明:该相关器具有较强的抑制噪声的能力,它能有效地将淹没在噪声中的微弱信号检测出来。

Correlator is the key element of lock-in amplifier which belongs to weaker signal test instruments. Lock- in amplifier is good at restrainning noise , mainliy because of its excellent performance of eliminating noise and interference. This paper tests and analyses the performance of the correlator via experiments, it shows that the correlator can restrain noise stongly ,it can detect weaker signal effectively which is submerged in the noise.