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Updated: Mar 20, 2026

Fabrication and Characterization of Superconducting Resonators
Published on: May 21, 2016
An improved model to predict bandwidth enhancement in an inductively tuned common source amplifier
Ashif Reza1, Anuraag Misra1, Parnika Das1
1Variable Energy Cyclotron Centre, 1/AF Bidhannagar, Kolkata 700064, India.
Abstract:
This paper presents an improved model for the prediction of bandwidth enhancement factor (BWEF) in an inductively tuned common source amplifier. In this model, we have included the effect of drain-source channel resistance of field effect transistor along with load inductance and output capacitance on BWEF of the amplifier. A frequency domain analysis of the model is performed and a closed-form expression is derived for BWEF of the amplifier. A prototype common source amplifier is designed and tested. The BWEF of amplifier is obtained from the measured frequency response as a function of drain current and load inductance. In the present work, we have clearly demonstrated that inclusion of drain-source channel resistance in the proposed model helps to estimate the BWEF, which is accurate to less than 5% as compared to the measured results.
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