An energy efficient design of a multi-layered crossover based 3:8 decoder using quantum-dot cellular automata.

Quantum Dot Cellular Automata (QCA) is advancing as an expectant and ongoing nanotechnology that relies on the behavior of electrons interacting with each other in a quantum cell where a single quantum cell acts like a molecule. This emergent technology promises to deal with the limitations of CMOS technology offering very low power operation with high speed. This paper presents an efficient 3:8 decoder using multilayer crossover technique and successfully implemented by QCA. The proposed decoder is more fault tolerant, having high performance and zero crosstalk due to adopting multilayer crossover technique. A comparative study also shows that the proposed design is less complex, dissipates less power and is more cost effective i.e. almost half of the cost of existing decoder having coplanar type. To validate our proposed design QCA Designer tool has been used.