Design, simulation and comparative analysis of a novel NCFET based astable multivibrator and a current starved astable multivibrator

Abstract

In this work, design, simulation and comparative analysis of a novel Negative Capacitance FET (NCFET), Carbon Nanotube FET (CNTFET), FinFET and CMOS based astable multivibrator (AMV) and a current starved astable multivibrator (CSAMV) have been done. A performance comparison of the proposed circuits is made using variations in resistance, capacitance, temperature, and supply voltage (\( V_{DD} \)) using HSPICE simulations. Most of the performance parameters are improved in the case of NCFET based CSAMV. An increase of 1.03% in the amplitude of output square wave in CNTFET-AMV when compared with FinFET-AMV was observed. A significant increase in the maximum frequency was achieved by 216% in NCFET-CSAMV compared with FinFET-AMV. The maximum frequency achieved is 220 MHz in the case of NCFET-CSAMV. It was also observed that NCFET-AMV Starts to function appropriately at 0.08 V compared to FinFET-AMV, which starts to function appropriately at 0.39 V. The average power dissipation was 2.41 times higher in FinFET-CSAMV than in NCFET-CSAMV. The average power consumed is a little higher in the case of NCFET-CSAMV than CMOS-AMV. Still, it can be overcome if the circuit is operated at a lower \( V_{DD} \).