示波器双通道2kV前置隔离电路的研究

Study on Twin-channel 2kV Front Isolating Circuit for Oscilloscope

在强电领域 ,用双踪示波器观测两路不共地的信号 ,如何避免短路一直是一个棘手的问题。利用高速光耦及电压负反馈等原理构成的示波器前置隔离电路可以实现信号源与示波器输入端的电压隔离与跟随 。

In the electric power field it is always difficult to avoid short cricui ting for two signals obtained at two location for oscilloscope observation.A front isolating circuit of oscilloscope based on high speed photo coupling and negative voltage feedback can achieve the isolation and following of signals, thus the observation of two suspended signals using twin trace oscilloscope.