QCA Estimation of Low Power Reversible Circuits

In recent years low power and small size are the keyword in the IC industry. This is where the importance of reversible gate and QCA (Quantum dot cellular automata) comes in. In nonreversible gates there is a definite amount of power loss involved. Interest in reversible computation arises from the desire to reduce heat dissipation, thereby allowing – higher densities and higher speed. The QCA offers a new transistor-less computing paradigm in nanotechnology. It has the potential for attractive features such as faster speed , smaller size and low power consumption than transistor based technology .By taking the advantages of QCA we are able to design interesting computational architecture. In this paper we are proposing a reversible gate and implementation of basic gates in reversible gate in QCA. Also comparisons with existing technologies are done.