Logic Gates

Logic Gates

Logic gates are tiny electronic decision makers.

AND: "Are both conditions true?"

OR: "Is at least one true?"

NOT: "Give me the opposite."

Logic Gates

A logic gate is an electronic circuit that receives one or more digital inputs and produces a digital output according to a particular logical rule.

Digital signals are commonly represented by:

0 → LOW

1 → HIGH

Three basic logic gates are AND, OR and NOT.

Logic gates form the basic building blocks of digital electronic systems.

AND Gate

An AND gate gives output 1 only when all required inputs are 1.

| A | B | Output | | - | - | ------ | | 0 | 0 | 0 | | 0 | 1 | 0 | | 1 | 0 | 0 | | 1 | 1 | 1 |

OR Gate

An OR gate gives output 1 when at least one input is 1.

| A | B | Output | | - | - | ------ | | 0 | 0 | 0 | | 0 | 1 | 1 | | 1 | 0 | 1 | | 1 | 1 | 1 |

NOT Gate

A NOT gate has one input and produces the opposite output.

Logic Gates — Advanced

Logic gates implement Boolean operations using binary states. More complex digital circuits are constructed by combining basic and derived logic gates.