Fractional order OTA -C current-mode all-pass filter

Abstract

In this paper, an operational transconductance amplifier (OTA) based fractional order all pass filter (FOAPF) of order $\boldsymbol{\alpha}\ [0 < \boldsymbol{\alpha} < 1]$ is presented. The FOAPF uses two DO-OTAs (dual output OTAs) and single fractional order capacitor (FC) of non-integer order $\boldsymbol{\alpha}$. A value of $\boldsymbol{\alpha}$ as 0.5 and 0.3 is taken for FC in our investigation. The proposed FOAPF is verified using PSPICE tool. Simulated AC responses are found to be in good agreement with theory.