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A novel design of coplanar 8-bit ripple carry adder using field-coupled quantum-dot cellular automata nanotechnology

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Abstract

Quantum-dot cellular automata (QCA) is a prominent research field that can replace MOS technology due to constraints of short-channel effects, power consumption and lithography costs. This manuscript presents novel and efficient designs of various combinational circuits that are XOR gate, half adders (HA), full adders (FA), half subtractor (HS), full subtractor (FS), ripple carry adder (RCA) and (2 × 1) multiplexer. This study presents an innovative concept for digital circuits that can be implemented in a single layer by using 90° cells in clock zones. The suggested circuit architectures are relatively basic and straightforward to construct a robust QCA layout. One may reduce the overall size and the number of QCA cells by using the aforementioned designs and incorporating them into bigger circuits, such as the 4-bit and 8-bit RCA. Every design suggested in the study is compared to a design already published in the literature, and it is discovered that the suggested designs are much superior in terms of latency, area, number of cells and gate counts. QCADesigner tool confirms the functional correctness of proposed circuits. All newly created FAs, Design 1, Design 2, Design 3 and Design 4, exhibit cell count improvements of 18.88%, 40%, 46.66% and 4.44%, respectively, compared to the best-reported design. The area efficiency improves by up to 83.6% and 35.11%, respectively, while the cell count improves by 67.8% and 25.15% for 4-bit and 8-bit RCA adders, indicating that they are more suited for computational sciences.

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No data are associated with the manuscript.

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Author information

Authors and Affiliations

  1. Electronics and Telecommunication Engineering Department, Symbiosis Institute of Technology, Symbiosis International Deemed University Pune, Pune, India

    Sankit Kassa & Vijay Lamba

  2. School of Electronics Engineering, VIT-AP University, Amaravathi, Andhra Pradesh, 522237, India

    Neeraj Kumar Misra

  3. Department of Computer Engineering, Faculty of Engineering and Natural Sciences, Kadir Has University, Istanbul, Turkey

    Seyed Sajad Ahmadpour

  4. Department of Electronics and Communication Engineering, National Institute of Technology, Warangal, India

    Narendar Vadthiya

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  1. Sankit Kassa
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  2. Neeraj Kumar Misra
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  4. Vijay Lamba
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  5. Narendar Vadthiya
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Contributions

SK was involved in conceptualization, visualization, project administration, formal analysis, methodology, validation, supervision, writing—original draft and writing—reviewing and editing. NKM was responsible for visualization, conceptualization, validation, formal analysis, methodology, writing—original draft and writing—reviewing and editing. SSA contributed to visualization, formal analysis, methodology validation, supervision and writing—reviewing and editing. VL took part in visualization, methodology validation, supervision and writing—review. NV participated in formal analysis, visualization, methodology validation, supervision and writing—review.

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Correspondence to Neeraj Kumar Misra.

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Kassa, S., Misra, N.K., Ahmadpour, S.S. et al. A novel design of coplanar 8-bit ripple carry adder using field-coupled quantum-dot cellular automata nanotechnology. Eur. Phys. J. Plus 138, 731 (2023). https://doi.org/10.1140/epjp/s13360-023-04369-4

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