Logic Gates

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Logic gates are the basic building blocks of any digital system. It is an electronic circuit having one or more than one input and only one output. The relationship between the input and the output is based on a certain logic. Based on this logic gates are named as AND gate, OR gate, NOT gate etc.

AND Gate

A circuit which performs an AND operation is shown in figure. It has n input (n >= 2) and one output.

AND gate

Logic diagram

AND Logical Diagram

Truth Table

AND Truth Table

OR Gate

A circuit which performs an OR operation is shown in figure. It has n input (n >= 2) and one output.

OR gate

Logic diagram

OR Logical Diagram

Truth Table

OR Truth Table

NOT Gate

NOT gate is also known as Inverter. It has one input A and one output Y.

NOT gate

Logic diagram

NOT Logical Diagram

Truth Table

NOT Truth Table

NAND Gate

A NOT-AND operation is known as NAND operation. It has n input (n >= 2) and one output.

NAND gate

Logic diagram

NAND Logical Diagram

Truth Table

NAND Truth Table

NOR Gate

A NOT-OR operation is known as NOR operation. It has n input (n >= 2) and one output.

NOR gate

Logic diagram

NOR Logical Diagram

Truth Table

NOR Truth Table

XOR Gate

XOR or Ex-OR gate is a special type of gate. It can be used in the half adder, full adder and subtractor. The exclusive-OR gate is abbreviated as EX-OR gate or sometime as X-OR gate. It has n input (n >= 2) and one output.

XOR gate

Logic diagram

XOR Logical Diagram

Truth Table

XOR Truth Table

XNOR Gate

XNOR gate is a special type of gate. It can be used in the half adder, full adder and subtractor. The exclusive-NOR gate is abbreviated as EX-NOR gate or sometime as X-NOR gate. It has n input (n >= 2) and one output.

XNOR gate

Logic diagram

XNOR Logical Diagram

Truth Table

XNOR Truth Table

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