The Design of filter Based on Butterworth

Aim at the high frequency characteristics of noise in the industrial field, for improve the accuracy of the signal acquisition system,this paper proposed a design of signal filter based on Butterworth low-pass filter, which built a physical simulation model and gave the derivation process of filter, and calculation process of RC value. It has been found that this scheme can effectively improve the signal-to-noise ratio of the system in industrial field, has strong control ability to suppress interference signal, and has the advantage of smaller distortion and so on to the input signal which should be measured.