贝塞尔滤波器的计算机辅助设计

贝塞尔型滤波器具有优良的时延性,因而常用于选择性要求低而时延性要求高的场合。本文介绍了根据给定滤波器技术指标能自动确定贝塞尔滤波器阶数,并计算出相应的滤波器传输函数和时延函数的一种计算程序。另外还提出了一种时延函数的近似计算方洼。使用它显然可以减轻滤波器设计过程中的繁琐工作。

Computer—Aided Design of Bessel Filters

Because of its good time-delaying Character, Bessel filters are widely used when selectivity is not so important, and time-delaying performance is highly demanded. In this paper the flow charts of the computer programs are given for automatically determining the order of the filter as well as calculating the transfer and time-delay functions once the technical requirements are given. Another approach for approximately calculating the time-delay function is also introduced in the paper. Through this approach, the design work of the filter may be significantly simplified.