有源模拟滤波器的MATLAB辅助设计方法

摘要

在简要概述传统有源模拟滤波器设计方法的同时给出利用MATLAB 进行有源模拟滤波器设计的方法，通过对有源模拟滤波器两种设计方法关键步骤的比较，给出了MATLAB能有效地简化有源模拟滤波器设计的结论。结合有源模拟滤波器的特性，给出了零极点分配原则和级联原则；同时介绍了如何用MATLAB给出滤波器总体和局部幅/相频特性，为滤波器调试提供了参考。通过设计实例，验证了本文提出的设计方案的便捷性、直观性、可行性。%The method of MATLAB-aid design of active analog filters is introduced after a briefly review of the traditional design method. By comparing the two methods on the key steps of active analog filter design, it is clearly showed that MATLAB can simplify the process of designing active analog filters. Based on the features of active analog filters, the rules of zero-pole distribution and cascading order are proposed. Simultaneously, the method of getting filter’ s amplitude/phase vs. frequency character by MATLAB is introduced and it can offer a ref-erence for debugging the filters. Through a certain example, the method proposed in this paper is proved to be simple, understandable and feasi-ble.