CNTFET based class AB current conveyor Ⅱ: Design, analysis and waveform generator applications

摘要

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 similar to 31% less, Y resistance has increased by two orders, total harmonic distortion and power consumption have got reduced by similar to 62% and similar to 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 similar to 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.