AND Gate
| Input A | Input B | Output |
|---|---|---|
| false | false | false |
| false | true | false |
| true | false | false |
| true | true | true |
An AND gate is a digital logic gate with two or more inputs and one output that performs logical conjunction. The output of an AND gate is true only when all of the inputs are true. If one or more of an AND gate's inputs are false, then the output of the AND gate is false.
The truth table for an AND gate with two inputs appears to the right.
Symbols
Each of the symbols below can be used to represent an AND 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 an AND gate behaves.
Further Reading
To learn more, check out the following external resources:
AND gate on Wikipedia
Multiple-input gates on All About Circuits
Basic Logical Functions and Gates at Play-Hookey
Simulate with Logicly
Logicly provides an engaging, hands-on learning environment for teaching logic gates and circuits. Download the Free 30-Day Trial today to evaluate Logicly in your classroom or lab. Learn More »
