RC有源滤波器CAD

THE COMPUTER AIDED DESIGN OF RC ACTIVE FILTERS

本文报导了新研制的RC有源滤波器CAD软件FILT，它能根据用户指定的设计要求和选定的滤波器类型，自动确定阶数和零极点位置；分析并给出频域的幅频和相频曲线及对阶跃函数和冲击函数的时域响应特性；自动设计出电路，标出元件值；自动生成PSPICE源文件，并直接用PSPICE元件库中的运放进行特性模拟．FILT不仅是有实用价值的工程设计软件，而且也是很好的计算机辅助教学软件．

A new software used for RC active filter design is introduced. According to the inputinformation from the user, it can calculate the order of the filter and show the positions ofthe poles and zeros automatically. It can analysis the amplitude and phase frequency char-acteristics and the transient response to both step and impulse function as well. It can alsogive the corresponding circuit structure and PSPICE file. This program (FILT) is not onlya useful engineering software but also a computer aided instruction program.