Design And Implementation Of Low Power Combinational Circuits On FPGA Using Reversible Encoder And Decoder In Vivado

Abstract

In the present emerging field for the research the reverse logic is one of the most demanding and helpful concept. The main purpose of this paper is to realize various types of combinational circuits like adder, multiplexer..etc using reversible encoder and decoder circuits with minimum quantum cost. There are many reversible logic gates like Fredkin gate, Feynman gate, Double Feynman gate, Peres gate, Seynman gate etc. The concept is explained using the reversible encoder and decoder by making use of Fredkin gates and Feynman gates with minimum quantum cost. The reversible logic can be explained as the logic in which the number of output lines are equal to the number of input lines and using all the bits in the circuit.ie. there are n-input and k- output Boolean function F(X1,X2,X3….Xn) is said to be reversible if and only if (i) n is equa l to k,(ii)each input pattern is mapped uniquely to the output pattern. The gate must run forward and backward which means the inputs can be retrieved from the outputs. Thus when the device obeys these two conditions the second law of thermodynamics guarantee that the device dissipates very low amount of heat. Thus the Fan-Out and Feedback are not allowed in logical reversibility. In recent days ,the reverse logic is used in its applications like Qunatum Computing, Optical Computing, Nano-Technology, Low Power VLSI. Thus the main feature of it being the property of Low Power Consumption.The circuit has been Designed, Simulated and Implemented using VIVADO Software.