For the lowpassfilter example above, you have a choice of two FIR and four IIR digital filter designs.
对于上面的例子提及的低通滤波器，你可以选择两种FIR和四种IIR数字滤波器进行设计。
2
A simple assembler routine fits a digitallowpassfilter into a microcontroller.
一个简单的汇编程序适合于微处理器实现数字低通滤波器。
3
A technique used to design infinite impulse response (IIR) digital filters from the squared magnitude function of a normal analog lowpassfilter is presented in this paper.