An area efficient multiplexer for crossbar arbiter design using quantum dot cellular automata

The demand for the design and implementation of efficient crossbar arbiters has raised due to advancement in network-on-chip communication. The function of arbiters is to resolve contention among different i/o ports accessing a common resource. Digital circuits such as multiplexers are building blocks for the implementation of such arbiters in order to provide the best connectivity. The major challenge for the design of on-chip arbiters is to keep the overall area overhead at the minimum level. In this paper we have proposed an optimized design for 4:1 MUX using Quantum Dot Cellular Automata (QCA) technology. QCA is an emerging nanoscale technology which provides advantages such as extremely small size, low power consumption and very high speed. The proposed design has been simulated with QCADesigner tool. From the simulation results it can be derived that the proposed 4:1 MUX occupies 0.97844 μm
²
area which is 18% lesser than the previous most efficient design. The number of cells has also been reduced by 23 % Therefore, the proposed 4:1 MUX design in QCA implementation provides an optimal solution for the implementation of an area efficient arbiters.