2-Input NOR Gate
The NOR gate with 2 inputs is called a 2-input NOR gate. It gives the output high when both the inputs are low.
The truth table for 2-Input NOR Gate
The following truth table represents the NOR gate.
A |
B |
A NOR B |
---|---|---|
0 |
0 |
1 |
0 |
1 |
0 |
1 |
0 |
0 |
1 |
1 |
0 |
Expression for 2-Input NOR Gate
From the above truth table, expression for NOR gate is:
A NOR B = A’B’ = (A + B)’
Logic Diagram of 2- Input NOR Gate
Below is the logic diagram for NOR gate.
Implementation of NOR Gate from NAND Gate
Implementation of the NOR gate from the NAND gate is possible because NAND is a Universal gate i.e., it can implement all other gates. The NAND gate gives output low when all the inputs are high whereas the NOR gate gives output high when all inputs are low. In this article, we will implement the NOR gate using the NAND gate.
Table of Content
- NOR Gate
- NAND Gate
- Implementation of NOR Gate from NAND Gate
- Conclusion