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Design of Low Power Combinational Circuits Using Reversible Logic and Realization in Quantum Cellular Automata

A.Kamaraj , I.Vivek Anand , P.Marichamy

In modern VLSI systems, power dissipation is very high due to rapid switching of internal signals. Landauer showed that the circuits designed using irreversible elements dissipate heat due to the loss of information bits. Information is lost when the input vectors cannot be recovered from circuit’s output vectors. To overcome the above drawback reversible logic is introduced where the number of output vectors are equal to the number of input vectors. In this paper the basic reversible gates are realized using the tanner tool. The Half adder using CMOS logic is compared with the reversible logic and the corresponding power are measured using T-Spice