TY - JOUR ID - 72597 TI - Symmetrical, Low-Power, and High-Speed 1-Bit Full Adder Cells Using 32nm Carbon Nanotube Field-effect Transistors Technology (TECHNICAL NOTE) JO - International Journal of Engineering JA - IJE LA - en SN - 1025-2495 AU - Safaei Mehrabani, Yavar AU - Shafiabadi, Mohammad Hossein AD - Computer, Independent Researcher AD - Computer Engineering, Islamic Azad University, Islamshahr Branch Y1 - 2015 PY - 2015 VL - 28 IS - 10 SP - 1447 EP - 1454 KW - Nanoelectronic KW - CNFET KW - full adder KW - CTL KW - PTL KW - Low KW - Power KW - high KW - Speed DO - N2 - Carbon nanotube field-effect transistors (CNFETs) are a promising candidate to replace conventional metal oxide field-effect transistors (MOSFETs) in the time to come. They have considerable characteristics such as low power consumption and high switching speed. Full adder cell is the main part of the most digital systems as it is building block of subtracter, multiplier, compressor, and other larger circuits. Therefore, it has a direct impact on the overall performance of the entire digital system. In this paper, we have presented two novel full adder cells using both capacitive threshold logic (CTL) and path transistor logic (PTL). The proposed cells have two symmetrical and identical modules to provide Sum and output carry (Cout). Intensive simulations using Synopsys HSPICE tool are run to evaluate the performance metrics of the proposed cells against some state-of-the-art full adders. Simulations are carried out in the presence of varying power supplies, temperatures, and output loads. Moreover, since process variations are a concern at the manufacturing stage of integrated circuits, we have performed Monte Carlo transient analysis to study the robustness of the proposed cells against diameter variations of carbon nanotubes (CNTs). Simulation results demonstrate that the proposed cells outperform their counterparts and exhibit reasonable results. UR - https://www.ije.ir/article_72597.html L1 - https://www.ije.ir/article_72597_91b7965996341a7a9e3fd1facbb59e45.pdf ER -