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