Overview

• A logic gate is a fundamental component of a digital circuit. Each gate has one or more inputs and produces a single output that depends on the input(s). Multiple logic gates can be combined to make complex circuits to carry out processing.
• Each logic gate has a symbol, that is used in circuit diagrams, and a unique truth table that shows how the output changes with different inputs.
• You can think of the inputs to logic gates as 1s and 0s. These values are determined by the voltage that flows around the system where a high voltage is evaluated as 1(True) and a low voltage is evaluated as 0 (False). Conventionally we usually label the output Q.