Design and analysis of two stage operational amplifier based on emerging sub-32nm technology

Abstract

Carbon Nanotube Field-Effect Transistor (CNFET) is a promising candidate for future electronic devices for low-power low-voltage digital or analog circuit application. In this paper, we presented a low-power low-voltage two stage operational amplifiers (OPAMPs) based on emerging CNFET technology. The proposed CNFET based operational amplifier (OPAMP) performance characteristic are studied and compared with existing CMOS sub-32nm technology. The operational amplifier performance characteristics are obtained by using HSPICE software for circuit simulation at 0.9V input supply voltage. Simulation results show that the proposed CNFET OPAMP circuit achieve high dc gain more than 45dB, high Gain Bandwidth up to 198MHz, phase margin is 48 degrees, the output swing is ±0.9V, settling time is 0.754ns, CMRR is 52.45dB, power supply rejection ratio is 54.35dB and low static power dissipation of 13μW. The results obtained suggest that the carbon nanotube (CNT) OPAMP has a promising potential for low-power, highs-peed applications in both analog and mixed-signal nanoelectronic circuits.