基于Matlab的模拟滤波器设计与仿真

巴特沃思、切比雪夫模拟低通滤波器通常是设计模拟高通、带通和带阻滤波器的原型,先按给定频率响应巴特沃思、切比雪夫低通Ha（s）逼近,然后由选定Ha（s）实现二端口网络的电路结构和参数值。在此对达林顿T型和П型电路结构的滤波器元件参数进行了编程计算,并对其系统函数的幅频特性进行仿真。仿真结果符合设计要求,该方法便捷,程序具有可扩展性。

Design and Simulation of Analog Filter Based on Matlab

Butterworth and Chebyshev analog low-pass filters are usually designed to simulate high-pass, band pass and band stop filter prototypes. Butterworth and Chebyshev low-pass Ha（s） approximation is responded according to a given frequency, and then the circuit structure and parameter values are realized by selected Ha（s）. The element parameters of the filter with structures of Darlington T-type and П-type circuits are performed with the calculation and program, and then the amplitude-frequency characteristic of its system function is simulated. The simulation results show that the system can meet the design requirements, the method is convenient and the program has expansibility.