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Designing Reconfigurable Quantum-Dot Cellular Automata Logic Circuits

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Quantum-dot cellular automata (QCA) is an emerging nanoscale technology and a possible alternative to conventional CMOS technology. QCA has attractive features such as high speed, low power consumption and smaller area occupation. In this paper, a novel configurable QCA circuit is presented. This circuit can be configured to perform various logic functions such as 2-input or 3-input AND, 2-input or 3-input OR, and other possible variations. By using these kinds of circuits, the hardware requirements for a QCA design can be reduced and various functions can be obtained. We then propose an efficient QCA design of a one-bit full adder constructed based on our circuit. Our design will be compared with previous designs. The comparison shows that the proposed adder has better performance in terms of latency, complexity, and size in QCA. In order to verify the functionality of the proposed circuit, it is checked by means of computer simulations using QCADesigner tool.
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Document Type: Research Article

Publication date: May 1, 2013

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  • Journal of Computational and Theoretical Nanoscience is an international peer-reviewed journal with a wide-ranging coverage, consolidates research activities in all aspects of computational and theoretical nanoscience into a single reference source. This journal offers scientists and engineers peer-reviewed research papers in all aspects of computational and theoretical nanoscience and nanotechnology in chemistry, physics, materials science, engineering and biology to publish original full papers and timely state-of-the-art reviews and short communications encompassing the fundamental and applied research.
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