In the recent years, reversible logic has emerged as a promising technology having its applications in low power CMOS, Quantum Computing, Nanotechnology and Optical Computing. Mostly in every Computing Systems bit information is either erased or changes its status every time it performs a logic operation. This erasure is done very inefficiently and heat is dissipated in each bit of erasing. Energy efficient digital circuits used in computing systems are being developed using Reversible Logic Technique. In this paper concepts of various reversible logic gate has been described which may be used as building blocks of digital circuits used in computing system.

Key word : , ,