Single-Input Multiple-Output and Multiple-Input Single-Output Fractional-Order Filter Designs

Novel single-input multiple-output and multiple-input single-output fractional-order filter topologies are presented in this paper. They are constructed from two fractional-order integrators with appropriate feedback and feed-forward paths, as well as from summation stages. The employed active cells are Operational Transconductance Amplifiers, providing the capability for electronic tuning of the realized time-constants, while the required fractional-order capacitors are approximated by appropriately configured RC networks. The provided simulation results, obtained using the Analog Design Environment of the Cadence software and the Design Kit from Austrian Mikro Systems 0.35 mu m CMOS process, confirm the correct operation of the proposed topologies.