一种便于观测的信号抽样及复原方法

利用倍频器，将重复频率与连续信号ｔ（ｔ）的频率相同的方波进行若干次倍频后，对连续信号进行抽样，从而获得离散的抽样信号ｆｓ（ｔ），再利用有源低通滤波器使其复原成连续信号ｆ（ｔ）。避免了一般抽样器不便于观测的缺点。

A Layout of Easily Observed Signal Sampling and Restoring

The continuous signal is sampled with a frequency multiplier which doubles several times the repeated frequencyand the square-wave whose frequency is the same as the continuous signal,and thus a discretely sampled sigmal is obtained.Then the sampled signal is turned back to be the continuous signal by making use of the active low-pass filter.In the wholeprocess,the drawback of the general sampler,that is being difficult to observe,is thus overcome.