Abstract: Digital signal processing is widely used in lots of fields, such as in science and project technique. Compared with FIR digital filter, IIR digital filter can get high selectivity with low factorial. A kind of IIR digital filter design method was introduced in the paper, which is based on FPGA. By used the design plant of MAX+PLUSⅡ, we adopt blocking method named “Top-down ” and divide the entire IIR digital filter into four blocks, which are Clock control, Time delay, Multiply-addition and Progression. After described with VHDL, we do emulate and synthesis to each block. The result shows that, the introduced IIR digital filter runs fast, and the coefficient changes agility. It has high worth for consulting.
Key words: Electronic Design Automation, IIR Digital Filter, Field Programmable Gate Array, very High Speed Integrated Circuit Hardware Description Language (VHDL)