Abstract
Design of fractional order analog filter, using a single Operational Transresistance Amplifier (OTRA) as an active current mode building block, is presented. The order of the proposed filter is 1.5. The theoretical results have been verified with PSPICE simulation. Obtained filter was realized using OTRA using the RC-RC decomposition technique. Frequency response for the presented filter is shown in the paper. The proposed filter offers some important features: employing single operational transresistance amplifier as an active element, lower sensitivity, insensitive to stray capacitances and parasitic resistances due to internally grounded input terminals of OTRA. Simulation results agree well with the theoretical values. KeywordsAnalog filters, fractional order, OTRA, CFE
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