Title: New fully single layer QCA full-adder cell based on feedback model

Authors: Somaye Mohammadyan; Shaahin Angizi; Keivan Navi

Addresses: Department of Computer Engineering, Science and Research Branch, Islamic Azad University, Tehran, 1477893855, Iran ' School of Computer Science, Institute for Research in Fundamental Sciences (IPM), Tehran, Iran ' School of Computer Science, Institute for Research in Fundamental Sciences (IPM), Tehran, Iran

Abstract: Quantum-dot cellular automata (QCA) is one of the pioneer nanoelectronics for possible substitution of conventional CMOS circuits. In this paper, a nanoelectronic-compatible gate-level design for one-bit full-adder cell is proposed. This design is appropriate to apply in most of majority gate-based technologies. Hence, a fully single layer QCA structure for one-bit full-adder cell is implemented using this cell. The addition operation in the presented cell is accomplished using a feedback loop. This loop saves carry value through a synchronised four-phase QCA wire to produce sum value at the next level. The proposed one-bit full-adder cell excels most of previously reported structures by removing wire crossing overhead and decreasing cell complexity. QCA Designer tool as a popular simulation engine in QCA area is used for endorsing the proper functionality of the proposed circuit.

Keywords: quantum dot cellular automata; single layer QCA; nanoelectronics; majority gate-based technologies; one-bit full adder cells; feedback loop; system architecture; quantum dots; nanotechnology; simulation.

DOI: 10.1504/IJHPSA.2015.072847

International Journal of High Performance Systems Architecture, 2015 Vol.5 No.4, pp.202 - 208

Received: 21 Feb 2015
Accepted: 14 May 2015
Published online: 04 Nov 2015 *

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