Comparative study of lc ladder filter with 3-ota simulated inductors

The innovative technique of realising floating inductor using OTA’s as an active element and grounded capacitor for the realisation of the floating inductor was comparitively studied in developing four stage LC ladder low pass filters. A comparitive study of 3 OTA’s and grounded capacitor of different configarations, as modified technique of floating inductor in ladder filter applications was studied in comparision with gyrator concept. The response of each stage exhibits the shootng characteristics of the output voltage in respect of filtering characteristic property with sharp roll off ratio in the modified technique of floating inductor. A comparative study on four stage LC ladder low pass filter using gyrator concept was exhibiting best performance in filtering action which has high frequency application in instrumentation.