Gm-C Fractional Bessel Filter Of Order ($1+\alpha$)

Abstract

The paper discusses the design and circuit realization of a low-pass fractional Bessel filter of order ($1+\alpha$) using the inverse-follow-the-leader-feedback (IFLF) structure. The transfer function of the Bessel filter is verified for correctness using MATLAB software. The circuit realization of Bessel filter using voltage controlled current source (VCCS) behavioral model of $G_{m}$-block is validated using Cadence software. The flexibility to adjust the cut-off frequency for different values of $\alpha$ has been verified. The group delay and step response plots for different values of $\alpha$ are presented.