Abstract
This paper is concerned with designing a fractional order filters in voltage mode (VM) employing three single output operational trans-conductance amplifiers (OTAs) and two fractional order capacitors. The presented structure can realize all second-order filters functions namely, fractional order low pass filter (FLPF), fractional order high pass filter (FHPF), fractional order band pass filter (FBPF), fractional order band reject filter (FBRF) and fractional order all pass filter (FAPF) in voltage mode (VM) using appropriate selection(s) of input signal(s). PSPICE simulation results using fractional order capacitor from $\alpha=0.7$ to $\alpha=0.9$ (designed using Valsa approximation) have been presented.
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