4 Bit Comparator Using Logic Gates. Binary comparators are logic gates circuit used to compare two binary inputs. Truth table of an xnor logic gate.
Design Of High Speed And Low Power 4 Bit Comparator Using Fgmos Sciencedirect from www.sciencedirect.com
There are two types of binary comparators. Seeing from the above diagram we can use 11 gates to implement the 4 bit comparator beside the inverters. We can therefore design a multi bit equality comparator by combining several xnor gates together to compare each bit of both inputs.
The 74ls181 is a bit slice 4 bit arithmetic logic unit alu and was the first complete alu on a single chip.
If all are equal you get 1. A digital comparator s purpose is to compare numbers and represent their relationship with each other. This is entirely expected from the name. In this design we try to reduce optimization parameters like number.
