## XNOR GateThe XNOR gate is the complement of the XOR gate. It is a hybrid gate. Simply, it is the combination of the XOR gate and NOT gate. The output level of the XNOR gate is high only when both of its inputs are the same, either 0 or 1. The symbol of the XNOR gate is the same as XOR, only complement sign is added. Sometimes, the XNOR gate is also called the ## 2-input Ex-NOR gateIt is a simple form of the hybrid gate XNOR. In this type of XNOR gate, there are only two input values and an output value. There are 2 Y=(A⨁B)' Y=((AB)'+AB) The truth table and logic design are given below:
## The 3-input XNOR GateUnlike the 2-input XNOR gate, the 3-input XNOR gate has three inputs. There are 2 Y=(A⨁B⨁C)' Y=(ABC)'+ABC'+AB'C+A'BC The truth table and logic design are given below:
## Ex-OR gate equivalent circuitWe can form the XNOR or Ex-NOR gate using the gates such as AND, OR, and NOT gate. The main disadvantage of this implementation is that we use different types of gates to form a single XNOR gate. By using the NAND gates only, we can implement the Ex-NOR gate also. This is an easier way of producing Ex-NOR gate functionality. ## Use of Ex-OR gateEx-NOR gates are used mainly in electronic circuits that perform arithmetic operations and data checking such as Next TopicMinterm and Maxterm |