<scp>CNTFET</scp>based class<scp>AB</scp>current conveyor<scp>II</scp>: Design, analysis and waveform generator applications
Seema Jogad, Sajad A. Loan, Neelofer Afzal, Abdullah G. Alharbi
Abstract
Abstract In this work, we design and simulate a new class AB second generation current conveyor (CCII) employing 32 nm technology node carbon nanotube field effect transistors (CNTFET). The performance of the proposed CNTFET based class AB CCII (CNTFET‐CCII) has been optimized by altering the number of carbon nanotubes (CNTs) (N), CNT pitch (S), and CNT diameter ( D CNT ). The proposed CCII has been compared with the conventional CMOS‐based class AB CCII (CMOS‐CCII). The simulation study has revealed that in the proposed CCII, the voltage and current bandwidth (BW) have enhanced by two orders, terminal X resistance is ~31% less, Y resistance has increased by two orders, total harmonic distortion and power consumption have got reduced by ~62% and ~56% respectively in comparison to the conventional CMOS‐CCII. The proposed CNTFET‐CCII has been used to realize square/triangular waveform generators for the first time. It has been observed that the proposed CCII‐based waveform generators give distortion less output and temperature insensitive behavior with a very wide frequency range from ~161 KHz down to 0.79 Hz. Furthermore, seven times reduced power is achieved in the proposed CCII‐based waveform generator in comparison the conventional CMOS‐based wave generator.