NOT gate
A NOT gate (also often called Inverter) is a logic gate. Each NOT gate has only one input signal. Logically with NOT gates, the input and the output swap, so if you input 1 it outputs as 0; likewise if you input 0 it outputs as 1.The NOT gate negates the values of data or signal in its input. It will always output the opposite signal. Its main function is to interchange logic.
| INPUT A | OUTPUT NOT A |
| 0 | 1 |
| 1 | 0 |
In the 20th century an inverter was often made of a discrete transistor with other components, or several inverters were packaged in an integrated circuit.
Symbols
There are three symbols for the NOT gate:
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| MIL/ANSI Symbol | IEC Symbol | DIN Symbol |
Related pages
- OR gate
- AND gate
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