A Chebyshev IIR lowpass digital filter with adjustable cut-off rate
P. Thajchayapong, Manoon Puangpool, S. Banjongjit · International Journal of Electronics · 1980
For a given order of a Chebyshev IIR digital filter, existing design techniques using the squared magnitude function or the bilinear transform do not allow the freedom of adjusting the cut-off rate. An available transform method is used to overcome this difficulty.