Two Input XNOR Gate Using OR & NAND
Category: Logic Gates
Designer: RANA MUHAMMAD ADNAN KHALIL
Notes
This circuit is designed and simulated in Proteus 7.10. In this circuit you will learn how to make XNOR gate practically. 1. This is a two input XNOR gate circuit. 2. Before understanding this circuit, first see following previous circuits; i) Two Input OR Gate ii) Two Input AND Gate iii) Two Input NAND Gate and iv) Single Input NOT Gate in Logic Gates category. 3. There are several ways to make two input XNOR Gate, but here XNOR gate is made by using combination of OR and NAND Gates. 4. The truth table of XNOR gate is: In 1: In 2 : Out 0 : 0 : 1 0 : 1 : 0 1 : 0 : 0 1 : 1 : 1 5. From the above truth table we can see that if all number of inputs of XNOR gate are logic one (1) or all number of inputs are logic zero (0) then output is logic one (1). 6. The output is logic zero (0) when odd inputs are logic one (1) or when any input is logic zero (0). 7. Here logic one (1) means 5V and logic zero (0) means 0V or ground. Application: 1. This circuit is used to understand the working of XNOR gate. 2. This circuit is used when you don't have XNOR gate IC and you need XNOR gate. Download these files for performing more experiments.