Research and Application of Low-pass Filter in Power Data Acquisition System
Wang Fei · Mechanical Engineering & Automation · 2009
Low-pass filter is frequently used in the data acquisition system as anti-aliasing filter.Using a low-pass filter,high-frequency noise can be effectively restrained.Because the passive filter has the poor frequency characteristic,active filter is often adopted in the data acquisition system with high accuracy.The frequency characteristics of two different active low-pass filters,which are commonly used,are discussed in this paper.In addition,the practical application of both active filters is offered.