串联谐振装置在滤波器电路中的应用分析

基于二阶巴特沃思滤波器外电路衰减缓慢的特性,在原有巴特沃思电路基础上增加了串联谐振电路装置。使得在带外衰减速率增大的同时,减小了电路复杂性并节约了经费开支,再通过一个定点的陷波电路处理,使滤波效果大大改善。

Applicational Analysis of Series Resonant Device in the Filtering Wave Circuit

Based on the slow attenuation characteristics of outside circuit in second--order Butterworth filter of wave, the series resonant circuit device is added into the Butterworth circuit. The results are as bellowing, the rate of out--of--band attenuation is increased, the circuit complexity is reduced, and the expenditure is saved. And then processed through a notching wave circuit of fixed--point, the effect of filtering wave is improved greatly.