A new quantum-dot cellular automata full-adder

Authors:
Keivan Navi;Razieh Farazkish;Samira Sayedsalehi;Mostafa Rahimi Azghadi
Affiliations:
Faculty of Electrical and Computer Engineering, Shahid Beheshti University, G.C., Tehran, Iran;Department of Computer Engineering, Science and Research Branch of Islamic Azad University, Tehran, Iran;Department of Computer Engineering, Science and Research Branch of Islamic Azad University, Tehran, Iran;School of Electrical and Electronic Engineering, The University of Adelaide, Adelaide, SA 5005, Australia
Venue:
Microelectronics Journal
Year:
2010

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Abstract

A novel expandable five-input majority gate for quantum-dot cellular automata and a new full-adder cell are presented. Quantum-dot cellular automata (QCA) is an emerging technology and a possible alternative for semiconductor transistor based technologies. A novel QCA majority-logic gate is proposed. This component is suitable for designing QCA circuits. The gate is simple in structure and powerful in terms of implementing digital functions. By applying these kinds of gates, the hardware requirement for a QCA design can be reduced and circuits can be simpler in level, gate counts and clock phases. In order to verify the functionality of the proposed device, some physical proofs are provided. The proper functionality of the FA is checked by means of computer simulations using QCADesigner tool. Both simulation results and physical relations confirm our claims and its usefulness in designing every digital circuit.