By SachchidaNand Shukla and Susmrita Srivastava
New circuit model of MOSFET based small-signal narrow-band amplifier is proposed and qualitatively analyzed. Proposed amplifier circuit uses identical MOSFETs in Triple Darlington configuration and provides an optimum performance for the input signals swinging below 15mV. In the narrow-band performance range, the proposed amplifier produces simultaneously high voltage and current gains with low harmonic distortion. The proposed amplifier can be used to process audio range signal excursions. Variations in voltage gain as a function of frequency and different biasing resistances, temperature dependency of performance parameters, bandwidth and total harmonic distortion of the amplifiers are also perused.