New fully single layer QCA full-adder cell based on feedback model
by Somaye Mohammadyan; Shaahin Angizi; Keivan Navi
International Journal of High Performance Systems Architecture (IJHPSA), Vol. 5, No. 4, 2015

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.

Online publication date: Wed, 04-Nov-2015

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