An Efficient Inverter Logic in Quantum-Dot Cellular Automata for Emerging Nanocircuits

Among cutting-edge nanotechnologies, quantum-dot cellular automata (QCA) is a well-matched substitute for transistor-based technologies. Full-adder as a primary element of computational circuits has a great effect on other circuits. Hence this paper presents a new schematic design of QCA full-adder (QFA) to implement an efficient layout with minimum cells. The simple structure of the proposed design in minimum latency makes the aforementioned layout unique among state-of-the-art QFAs. Besides, different sizes of ripple carry adder (RCA) are implemented using this efficient full-adder layout to show its applicability. The proposed design of this work are simulated using QCADesigner tool. Moreover, The proposed full-adder have verified with physical formulas. 32.43% decreasing cell count and 50% increasing speed is the result of a comparison between our optimum QFA layout and previously published design with a similar structure. Ultimately different sizes of ripple carry adders of this paper are compared to the previous layouts and results show the performance of suggested RCA's structure.

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“…(6). U T shows the total kink energy and is calculated using Eqs (7) (Navi et al 2010a;Sasamal et al 2016;Goswami et al 2020).…”

Section: Physical Proofmentioning

confidence: 99%

“…Fig. 4 a Majority gate, b usual QCA inverter, c optimized QCA inverter, d fault tolerant QCA inverter in Zahmatkesh et al (2019), e fault tolerant QCA inverter inGoswami et al (2020) …”

mentioning

confidence: 99%

A novel fast and small XOR-base full-adder in quantum-dot cellular automata

2020

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“…It does not involve any flow of electrons, as in the case of CMOS. The basic structural components of QCA based architecture are 3-input majority gate (MV) [5,6], Inverter [7,8] and Array of Cells [9,10]. Besides, the fan-out assumes a significant role in signal splitting for the substantial implementation of QCA arrays [11].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of composite logic gate in QCA embedding underlying regular clocking

et al. 2021

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Quantum-dot Cellular Automata (QCA) has emerged as one of the alternative technologies for current CMOS technology. It has the advantage of computing at a faster speed, consuming lower power, and work at Nano- Scale. Besides these advantages, QCA logic is limited to its primitive gates, majority voter and inverter only, results in limitation of cost-efficient logic circuit realization. Numerous designs have been proposed to realize various intricate logic gates in QCA at the penalty of non-uniform clocking and improper layout. This paper proposes a Composite Gate (CG) in QCA, which realizes all the essential digital logic gates such as AND, NAND, Inverter, OR, NOR, and exclusive gates like XOR and XNOR. Reportedly, the proposed design is the first of its kind to generate all basic logic in a single unit. The most striking feature of this work is the augmentation of the underlying clocking circuit with the logic block, making it a more realistic circuit. The Reliable, Efficient, and Scalable (RES) underlying regular clocking scheme is utilized to enhance the proposed design?s scalability and efficiency. The relevance of the proposed design is best cited with coplanar implementation of 2-input symmetric functions, achieving 33% gain in gate count and without any garbage output. The evaluation and analysis of dissipated energy for both the design have been carried out. The end product is verified using the QCADesigner2.0.3 simulator, and QCAPro is employed for the study of power dissipation.

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“…Quantum‐dot cellular automata (QCA) is evolving as a prominent nano‐electronic technology to fulfil the demand for low power high‐speed compact devices [10–14]. Recently, Abutaleb et al show how QCA inherent property can be used to design physically unclonable functions to enhance nano communication security [15].…”

Section: Introductionmentioning

confidence: 99%