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Operational efficiency of novel SISO shift register under thermal randomness in quantum-dot cellular automata design

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Abstract

For nano scale logic circuit, device area and power consumption are the major concerns. In this paper, the design of an optimized SISO shift register is explored based on quantum-dot cellular automata (QCA) device. The design is achieved in a single layer. To design the shift register circuit, a new QCA D flip-flop has been proposed. These new D flip-flop has minimum cell count and lower device area over existing designs. The proposed shift register also outperforms the existing designs by reducing cell count and area. The power consumption by the proposed design is carried out that shows the low energy consumption nature of the circuit. Logic gate, QCA cell and device density have been considered to evaluate the circuit. Simulation timing diagram and truth table of the proposed circuits are compared which shows that all the designs are functioning efficiently. Stability under thermal randomness for all the designs are analyzed which shows the steadiness of the designs. The impacts of control input, i.e., clock on the designs are explored. Besides the defects in proposed QCA layouts are also identified and excelled for fault free implementation.

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Acknowledgments

The authors are grateful to The University Grants Commission, India, for providing with the Grant for accomplishment of the project under the UGC Major Project File No. 41-631/2012(SR).

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Authors and Affiliations

  1. Department of Computer Science and Engineering, West Bengal University of Technology, BF-142, Salt Lake, Sector -I, Kolkata, 700064, India

    Jadav Chandra Das & Debashis De

  2. Department of Physics, University of Western Australia, Perth, Australia

    Debashis De

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  1. Jadav Chandra Das
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  2. Debashis De
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Correspondence to Jadav Chandra Das.

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Das, J.C., De, D. Operational efficiency of novel SISO shift register under thermal randomness in quantum-dot cellular automata design. Microsyst Technol 23, 4155–4168 (2017). https://doi.org/10.1007/s00542-016-3085-y

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  • DOI: https://doi.org/10.1007/s00542-016-3085-y

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