用数字逻辑语言设计一个十六阶的FIR滤波器，通过数字电路实现滤波处理-Digital logic language design a sixteen-stage FIR filter, the filtering process is implemented by a digital circuit

采用一种基于FPGA的IIR数字滤波器的设计方案：AD转换模块、IIR滤波模块、DA转换模块。(A design scheme of IIR digital filter based on FPGA is adopted: AD conversion module, IIR filter module and DA conversion module.)