Gates and Circuits

A gate is a device that performs a basic operation on electrical signals. The input and output value is either a 1 or 0. The type of value determines the type of gate to use. There are six types of gates, and they are AND, OR, XOR, NOT, NAND, NOR and XNOR

NOT Gate

• They are a inverter so if the input is 1 then the output is 0

AND Gate

Unlike a Not Gate, the AND Gate inputs two input signals.

OR Gate

like the AND Gate, it has two inputs. There are two different inputs, 1 or 0

XOR Gate

The XOR takes two inputs, but if the two inputs are 0 then it is zero

NAND and NOR Gates

The NAND and NOR gates are opposite the AND and OR gates.

The behavior of gates and circuits includes Boolean expressions, Logic diagrams, and truth tables.

The logic diagram is a graphical representation of a circuit. A Truth table defines the function of a gate by listing all the possible input combinations that a gate could encounter, along with the outputs.

Transistors

A transistor is a device that acts depending on the voltage level.