数字信号处理的fpga实现，用VHDL语言编程实现IIR滤波器,Digital signal processing to achieve the FPGA, using VHDL language programming to achieve IIR filter

采用一种基于FPGA的IIR数字滤波器的设计方案,通过QuartusⅡ的设计平台，采用自顶向下的模块化设计思想将整个IIR数字滤波器分为：时序控制、延时、补码乘加和累加四个功能模块。分别对各模块采用VHDL进行描述后，进行了仿真和综合。-IIR digital filter using a FPGA-based design, analyzes the theory and design method of IIR digital filter, then through QuartusⅡ de