基于EWB的巴特沃斯有源低通滤波器的设计与仿真

摘要

滤波器在信号处理、数据采集和传输、干扰抑制等很多领域都有广泛的应用,设计一个性能优良的滤波器对整个系统性能至关重要.传统的设计方法计算繁琐,电路形式和参数的确定比较复杂,本文介绍了一种利用归一化表经过简单计算就可快速设计各种截止频率的低通滤波器的方法,并用EWB软件对设计结果进行了仿真,结果证明该设计方法设计的滤波器性能符合要求,具有很好的实用性.%Filter is widly applied in signal processing,data acquisition and transmission,interference suppression.Design a hign performance filter is very important to the system.The traditional design method needs fussy calculation,the circuit form is complex and the parameters are difficult to determine.The paper describes a simple design method using normalized table,and simulates the result through EWB.The result shows the method is effective and utility.