VDTA based Fractional Order Universal Filter

Abstract

In this paper, electronic tunability of current mode multiple input single output (MISO) type modified biquad fractional order universal filter employing single voltage differencing transconductance amplifier (VDTA) and two grounded fractional capacitors is discussed. The tunability of all the filters, namely, fractional high pass filter (FHPF), fractional low pass filter (FLPF), fractional band pass filter (FBPF), fractional band reject filter (FBRF), and fractional all pass filter (FAPF) with respect to $a$ and I bias is shown. The workability of the modified filter is verified using PSPICE simulations.