Synthesis of Reversible Logic Circuits-A Technical Review

Traditional technologies such as CMOS show their limitations with an expanded growth of packing density. The usage of recent modern technologies is needed to address the traditional challenges. In modern technologies, managing the loss of energy is also a primary issue in the digital logic design for both manufacturer and as well as for the customer. Thus, Reversible logic is considered to be one of the efficient solutions to overcome such problems. The applications of reversible logic are in a wide range of domains - Digital Signal Processing, Optical Computing, Cryptography, and CMOS design with low power consumption. Thus, this paper discusses optimal-cost synthesis problems related to reversible logic circuits. The synthesis problem aims to obtain a network of gates with minimum cost that realize a given function by assuming the same cost for each gate, and each gate’s cost reflects the actual cost for its implementation. The discussion of various synthesis algorithms and a comparative study of them are presented by giving their essential features and limitations.