• Selvakumar G
• Dr.S.Karthigai Lakshmi
• Shankar S
• Surendhar Balaji B

In upcoming years reaching of CMOS technology to the end of its way is expected due to high cost of lithography, Short channel Effect(SCE) , Physical Scalability and heating challenges. An alternative method to overcome the above mentioned challenges is Quantum dot Cellular Automata(QCA), which provides smaller area, high speed and low power consumption. Adders and Subtractors are important in all arithmetic and signal processing circuits. In this paper a full subtractor is proposed with reduced number of cells . The proposed subtractor is designed using two Exor gatse, two inverter gates and one OR and AND gate . The design is simultated and their functionalities are verified using coherence vector simulation in QCA designer 2.0.3.

Inverter logics, majority gates, Quantom dot Cellular Automata, Subtractor.

"An optimal design of full subtractor in QCA Nanotechnology", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 8, page no.41-44, August-2020, Available :http://www.jetir.org/papers/JETIR2008006.pdf

"An optimal design of full subtractor in QCA Nanotechnology", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 8, page no. pp41-44, August-2020, Available at : http://www.jetir.org/papers/JETIR2008006.pdf