Designing high-speed, low-power full adder cells based on carbon nanotube technology

摘要

This article presents novel high speed and low power full adder cells basedon carbon nanotube field effect transistor (CNFET). Four full adder cells areproposed in this article. First one (named CN9P4G) and second one (CN9P8GBUFF)utilizes 13 and 17 CNFETs respectively. Third design that we named CN10PFS usesonly 10 transistors and is full swing. Finally, CN8P10G uses 18 transistors anddivided into two modules, causing Sum and Cout signals are produced in aparallel manner. All inputs have been used straight, without inverting. Thesedesigns also used the special feature of CNFET that is controlling thethreshold voltage by adjusting the diameters of CNFETs to achieve the bestperformance and right voltage levels. All simulation performed using SynopsysHSPICE software and the proposed designs are compared to other classical andmodern CMOS and CNFET-based full adder cells in terms of delay, powerconsumption and power delay product.