Introduction - If you have any usage issues, please Google them yourself
Commonly used digital filters have FIR digital filters and digital filter .FIR IIR digital filter has a precise linear phase characteristics, the signal processing is extensively used, and can be debugged using pre-designed FIR digital filter IPCore accomplished design, such as provided by Altera MegaCore Altera series for programmable devices, but need to purchase or apply for Altera trial version. in addition, for the same design specifications required by the order of the FIR filter IIR filters than high 5 ~ 10 times, high cost, and the order of the delayed signal is also larger .IIR filter required not only lower than the FIR filter, and can use the results of the analog filter design, design work is relatively small, using FPGA IIR filters also have a variety of advantages.