Design of High Speed 8-Bit Magnitude Comparator for Security Application

Abstract

A comparator is a digital or electronic circuit which is used to compare the given two inputs to give the result (greater than or lesser than or equal). This is widely used to compare the voltages and current in electrical as well as electronic circuits. This project proposed a design of 8-bit comparator which compares 8 bits of two binary data. This 8bit comparator is slightly different from conventional comparators, which can be built with two 4 bit comparators using XNOR gates or by neglecting the logic for greater or lower output; that result in reduction of gates and area. The simulations of the comparator can be done using Verilog code in Xilinx tool and analyzing its performance for various inputs in the same way a security password circuit and the cascading circuit are design as a application using proposed 8-Bit comparator.