Study of analog performance of common source amplifier using rectangular core–shell based double gate junctionless transistor

Abstract

A new state of the art double gate junctionless transistor (DGJLT) namely the rectangular core–shell DGJLT (RCS-DGJLT) based common source amplifier circuit is designed to investigate the performance. An RCS-DGJLT device is designed using a visual technology computer aided design tool and look up table-based Verilog-A model has been designed to carry out spice simulation of the circuit. Device simulation of RCS-DGJLT shows the extraordinary performance when compared to conventional DGJLT. The RCS-DGJLT exhibits an OFF current (Ioff ) ∼10−14 A, ON current (Ion ) ∼10−5 A, ON/OFF current ratio (Ion /Ioff ) ∼109, subthreshold slope ∼68.9 mV decade−1 and drain induced barrier lowering ∼52.6 mV V−1. Also, the AC response of RCS-DGJLT exhibits good performance like lower miller capacitances of order 10–16 F, maximum unity gain frequency of 138.8 GHz, transconductance generation efficiency of 40 V−1, and gain-bandwidth product of 25.4 GHz. The common source amplifier circuit using RCS-DGJLT provides the amplification up to 3.3 times which implies gain (Av ) to be 3.3. The low leakage power of 10.4 pW and average power of 31.2 µW of common source amplifier circuit based on RCS-DGJLT shows the greater potential of using the proposed device in analog applications. Also, the complete flow chart of the process used to design an analog circuit based on proposed RCS-DGJLT is discussed. The result shows the potential of using the RCS-DGJLT device in designing high-frequency applications.