access icon openaccess QCA circuit design of n-bit non-restoring binary array divider

This is an open access article published by the IET under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/)
Received 06/09/2017, Accepted 07/03/2018, Revised 05/03/2018, Published 29/03/2018

The physical limitations of complementary metal-oxide semiconductor (CMOS) technology have led many researchers to consider other alternative technologies. Quantum-dot cellular automate (QCA) is one of the nanotechnologies that is being considered as possible replacements for CMOS. In this paper, a QCA circuit for an n-bit non-restoring binary array divider (NRD) is designed. The proposed divider is developed using multi-layer and a QCA structure of the three-input XOR function. Compared to the previously proposed QCA designs for NRD, the proposed design provides further reduction in cell count, latency, and area. The results for a NRD show that the proposed design enables 14.8, 14.8, and 20.3% reductions in cell count, latency, and area, respectively. In addition, the proposed divider achieves 5.5, 18.8, and 33.1% reductions in cell count, latency, and area, respectively, compared to the existing designs.

Inspec keywords: nanoelectronics; dividing circuits; quantum dots; cellular automata; logic design; nanotechnology

Other keywords: alternative technologies; complementary metal-oxide semiconductor; cell count; CMOS; n-bit nonrestoring; QCA structure; QCA designs; three-input XOR function; $4 \times 4$ divider; quantum-dot cellular automate; QCA circuit design; binary array divider; $3 \times 3$ NRD

Subjects: Digital circuit design, modelling and testing; Logic circuits; Logic and switching circuits; Logic design methods

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