Filter coefficients of high-pass and band-elimination recursive digital filters with a maximally flat group delay
P. Thajchayapong, F. Cheevasuvit · International Journal of Electronics · 1979
The design technique for a recursive digital filter with a maximally flat group delay at an arbitrary specified frequency is known. It is shown here that, for certain cases, the filter coefficients for high-pass and band-elimination recursive digital filters with a maximally flat group delay can be expressed in closed forms.