一种新的现场信号变送隔离电路应用浅析

A Rough Analysis of the Application of Signals in Situ Switching the Isolating Circuits

对现场信号开发研制中的信号变送隔离电路进行了详细的剖析，着重介绍电压／频率转换芯片ＬＭ３３１的原理和在本电路中的应用，以及本电路的应用情况。结果表明：这种信号变送隔离电路具有抑制噪声干扰的双保险功能。

A detail analysis is made of the signal switching and isolating circuits being developed for the use in situs signals. The paper lays stress on the principle of conversion chip LM331 governing the volt frequency and its use in this particular circuit and also its applied conditions. The results show that this signal switching and isolating circuit serves the functions as two way safeguarding in reducing noise.