# NOT Gate (Inverter)

Input | Output |
---|---|

false | true |

true | false |

A NOT gate, often called an *inverter*, is a nice digital logic gate to start with because it has only a single input with simple behavior. A NOT gate performs *logical negation* on its input. In other words, if the input is true, then the output will be false. Similarly, a false input results in a true output.

The *truth table* for a NOT gate appears to the right.

## Symbols

Each of the symbols below can be used to represent a NOT gate. There are multiple international standards defined, and one may preferred over the other in your region of the world.

ASNI / IEEE | IEC |
---|---|

## Live Example

Try the following interactive example to see for yourself how a NOT gate behaves.

## Further Reading

To learn more, check out the following external resources:

Inverter (logic gate) on

*Wikipedia*The NOT gate on

*All About Circuits*Basic Logical Functions and Gates at

*Play-Hookey*