Improved Design and Comparison of a Low Power CNTFET based on D Flip-Flop

Carbon nanotube field effect transistors (CNTFETs) are auspicious nanoscale devices for realizing high performance with very thick and low power circuits. In this paper, different parameters of CNTFET from previous works have been studied and analyzed. Then, leakage current and leakage power of the proposed D flip-flop were compared with different reference circuits. The main goal is to improve, develop and design a CNTFET based D flip-flop. CNTFET's leakage current and leakage power consumption reduced drastically by decreasing diameter of CNT and number of CNT used in the CNTFET, which affected overall CNTFET's power consumption obviously. The proposed D flip-flop exhibited exquisite performance in case of leakage power consumption, having an average of 10.306 nW only, which is extremely low compared to the contemporary circuits. The chosen thickness of oxide and CNT's length for all the CNTFETs are 5 nm and 16 nm respectively. These CNTFETs are based on the results gathered from so that not only they can act as a D flip-flop correctly but also total power consumption of the device would be reduced as much as possible.

I. Introduction

Nowadays, Nanoscale devices are intriguing contenders to replace Complementary Metal Oxide Semiconductor (CMOS) technology in future Nano electronics. Due to their superior device physics, novel nanoscale semiconductor devices such as Carbon Nanotube Field Effect Transistors (CNTFET) and Nanowire transistors can serve as substitutes for future nanoscale devices. Devices like processors, GPUs, and RAMs are continually getting smaller and much more efficient. Their capacity is growing at the same time that their energy efficacy and ability to operate quickly are also improving. While using the same amount of power, CNTFET-based circuits are predicted to be 3 times faster than silicon transistors and quicker than silicon-based MOSFET. Additionally, the examination of the circuit model and its properties that could be utilized to supply the necessary power and could be evaluated on real-time devices would be a part of the future scope of CNTFET [1].