Abstract
QCA technology is a promising technology for implementing compact, energy-efficient and high-speed nano-scale digital circuits. This paper proposes various single-and multi-layer 2×4 and 3×8 QCA-based decoder structures. These structures are implemented based on a compact and energy-efficient cell interaction-based 2×4 uncontrollable decoder. The proposed structures are extensively simulated and evaluated using specialized QCA design tools. Simulation results show that the proposed structures have outperformed their recently reported counterparts and have achieved significant improvements in key design parameters including cell count, area, and energy dissipation. For instance, the proposed multi-layer 2×4 and 3×8 decoders have achieved up to 34% and 30% enhancements in cell count, 33% and 33% reductions in area requirements besides 44% and 27% improvements in energy dissipation, respectively as compared to their best existing counterparts. Hence, the proposed QCA-based decoders can serve as compact and energy-efficient building blocks for larger digital systems.
Published Version
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