Interpolation Between Minimum-Phase and Linear-Phase Frequency Responses

For digital equalization and general filtering applications it is common to specify the magnitude response of the filter and then derive typically the minimum-phase or linear-phase response so that the frequency domain is fully specified. This paper shows how the phase response can be smoothly varied from minimum-phase to linear-phase (and on through to maximum-phase) allowing continuous control of phase type. It is envisaged that future digital equalizers will incorporate a phase control to allow choice of minimum, linear or other intermediate phase response types.