Aim\ The principle and technology of parametric module for FIR filter via programmable logic device CPLD is introduced. Methods\ According to convolution expression of FIR filter
FIR filter can be achieved by using look up tables (LUTs) of CPLD. Results\ The different tap FIR filter design with CPLD can be implemented by this way. Conclusion\ The FIR filter can be easy implemented by parametric module design.