A computer program for designing digital elliptic filters
Alfred Gray, John D. Markel · IEEE Transactions on Acoustics Speech and Signal Processing · 1976
A computer program is presented for designing digital elliptic filters of the four most common types: low-pass, high-pass, bandpass, and bandstop. The program is presented in Fortran IV. The various numerical algorithms required for implementing the elliptic functions are referenced in the program and are obtained from readily available tables of mathematical functions. Examples for each filter type are presented.