NOR gate
A NOR gate is a combination of an or gate followed by a not gate.
In other words, it’s an inverted or gate.
It will output a 1 only when both of its input signals are 0. In all
other cases, it will output a 0.
Truth table
The truth table for it looks like:
| Input A | Input B | Output (A NOR B) |
|---|---|---|
| 0 | 0 | 1 |
| 0 | 1 | 0 |
| 1 | 0 | 0 |
| 1 | 1 | 0 |
1if the inputs are both0.