CNTFET-Based Design of Ternary Logic Gates and Arithmetic Circuits

Abstract

Trivalent logic is also called as ternary logic is a promising alternative to the conventional Boolean space. In modern VLSI, CMOS technologies are invented and the die size is reducing day by day. So the complexities on the die increases resulting into the high integration on the same die size. I order to drive the logic, we have to think about the multi-valued logic cell as there are some limitations with the conventional Boolean space. Ternary logic provides simplicity and energy efficiency in digital design as the logic reduces the complexity of interconnects and chip area along with the higher density of information storage. The proposed paper presents the physical design implementation of the various ternary arithmetic circuits which involves the universal gates as T-NAND and T-NOR. The ternary arithmetic based design are aimed to achieve the low power consumption, high stability. The physical designs are implemented and simulated using the Microwind 3.5 EDA tool with CMOS 45nm technology.

An Efficient 5-Input Exclusive-OR Circuit Based on Carbon Nanotube FETs

“…where π V is the bond energy between two adjacent carbon atoms in a tight bonding model and is equal to 3.033 eV, and e represents the electric charge of a single electron [28]. The CNTFET current also has a direct relation with the number of its tubes.…”

“…Digital signal processor circuits with a logarithmic number system composed of several multipliers and adders benefits from XOR gates [14]. Moreover, the important role of this gate has even appeared in optical telecommunication networks for bit pattern recognition, operations related to address comparison, and so on [15] [28]. The CNTFET can also be applied in polylactic acid structures [29].…”

“…Among these alternative technologies, the CNTFET is the most encouraging substitution for the conventional MOSFET family due to its similarities to MOSFET in terms of electrical properties and manufacturing process [26]. Up to now, many circuits have been successfully designed based on CNTFET technology, such as binary and ternary full adder cells, SRAM storage cells, multiple-valued logic circuits, and min-max circuits [27], [17]- [19], [21]- [24], [28]. The CNTFET can also be applied in polylactic acid structures [29].…”

“…Therefore, the length of the chirality vector, which is the circumference of the cylinder's base, is calculated according to (1) and CNT diameter D CNT can consequently be extracted from it, according to (2). where π V is the bond energy between two adjacent carbon atoms in a tight bonding model and is equal to 3.033 eV, and e represents the electric charge of a single electron [28]. The CNTFET current also has a direct relation with the number of its tubes.…”

A Novel Quaternary Full Adder Cell Based on Nanotechnology

“…Among these emerging nanotechnologies, CNTFET seems to be more appropriate on account of its likeness with MOSFET in terms of inherent electrical properties which makes it possible to utilize previously designed CMOS structures in the CNTFET technology without any significant modifications. Moreover, the unique one-dimensional band structure of the CNTFET represses backscattering and causes near-ballistic operation, which results in very high-speed operation [4].…”