Sixth-order non-minimum-phase delay functions with adjustable magnitude

Two sixth-order all-pole delay functions, the Bessel and a Chebyshev, are modified according to Budak´s technique to acquire five right-half s-plane zeros. The magnitude of the resulting functions is then adjusted to have the same half-power frequency as the corresponding Pade delay function, and the three functions are compared to each other in terms of various quantities associated with their frequency and step response. These quantities are next studied for various bandwidths in the case of the modified Chebyshev delay function.