An approach towards optimisation of 3 to 8 decoder using 5 input majority gate with coplanar crossing in Quantum dot Cellular Automata

Quantum-dot Cellular Automata (QCA), a transistor-less paradigm is the widely advocated new device architecture compared to the existing Complementary metal Oxide Semiconductor (CMOS) technology. Hence conversion from the existing CMOS technology in to the QCA technology has to be done. The QCA structures are created by mapping the existing CMOS technology to the Quantum dot paradigm, which offers very low power consumption with very high speed. This paper proposes a 3-8 quantum-dot cellular automata decoder using 5-input majority gates and 3 input majority gates with enable input and the design is implemented using QCA. The design has considerable reduction in the cell count, improvement in the area and it uses co planar Wire crossing. The Proposed design is validated using the QCA Designer tool.