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本讲座的第三讲介绍了锁相放大器利用相关检测原理实现对周期信号振幅的检测.然而,在实际的信号检测中,往往还希望从噪声中恢复信号的波形.它通常是一个很复杂的宽带函数.这时,利用锁相放大器已不再有效,需要借助其它微弱信号检测方法和仪器来恢复原始信号波形.假如被噪声混杂?
The third part of this lecture introduced the lock-in amplifier to detect the amplitude of the periodic signal by using the correlation detection principle, however, it is often desired to recover the signal waveform from the noise in the actual signal detection. It is usually a complicated Broadband function.At this point, the use of lock-in amplifier is no longer valid, need to rely on other weak signal detection methods and instruments to restore the original signal waveform.If the noise is mixed?