Fractional-Order Asymptotical Phase Shifter with Flat Magnitude Response

Abstract

This work deals with design of fractional-order asymptotical phase shifter having constant magnitude response within almost three decades (100 Hz–100 kHz) and frequency dependent phase difference going from 0 to −45 degrees. PSpice simulations employing macromodels of off-the-shelf active parts brought the results suitable for brief analysis of the complete solution of our phase shifter in both frequency and time domain. Magnitude flatness with only ±0.3 dB variation and maximal phase error in the middle of operational bandwidth 3.7 degrees prove very good performance of designed circuit.