High-Speed Ternary Half adder based on GNRFET

Abstract

Superior electronic properties of graphene make it a substitute candidate for beyond-CMOS<br />nanoelectronics in electronic devices such as the field-effect transistors (FETs), tunnel barriers, and<br />quantum dots. The armchair-edge graphene nanoribbons (AGNRs), which have semiconductor behavior,<br />are used to design the digital circuits. This paper presents a new design of ternary half adder based<br />on graphene nanoribbon FETs (GNRFETs). Due to reducing chip the area and integrated circuit (IC)<br />interconnects, ternary value logic is a good alternative to binary logic. Extensive simulations have been<br />performed in Hspice with 15-nm GNRFET technology to investigate the power consumption and delay.<br />Results show that the proposed design is very high-speed in comparison with carbon nanotube FETs<br />(CNTFETs). The proposed ternary half adder based on GNRFET at 0.9V exhibiting a low power-delayproduct<br />(PDP) of ~10-20 J, which is a high improvement in comparison with the ternary circuits based<br />on CNTFET, lately proposed in the literature. This proposed ternary half adder can be advantageous in<br />complex arithmetic circuits.