OPTIMIZED MAJORITY LOGIC-BASED MULTI-BIT MULTIPLEXER ARCHITECTURE IN QCA TECHNOLOGY

Abstract

Quantum-dot Cellular Automata (QCA) has emerged as a promising nanotechnology for
ultra-low power and high-speed digital circuit design beyond CMOS limitations. One of the fundamental
digital building blocks, the multiplexer, plays a critical role in computational circuits and communication
systems. This work presents the design and implementation of an optimized multi-bit multiplexer using
majority logic-based QCA. By leveraging the inherent properties of majority gates and inverters, the
proposed design achieves significant reductions in cell count, area, and latency compared to conventional
multiplexer architectures. The simulation results, obtained using QCADesigner, confirm the efficiency of
the design in terms of performance, scalability, and energy efficiency. The proposed QCA multiplexer
highlights the potential of majority logic to enable highly compact and low-power digital systems suitable
for next-generation nano computing applications