What is Logic gates and its types?
Logic Gates
In this page you will learn about What is logic gates and its fundamental types with its logic diagram symbol and Truth Table. After reading this page you will able to define Logic gates and its fundamental types.
Logic Gates is an electronic circuit having one or more than one input signals to produce standard output signals. A computer performs out all operations internally by means of combinations of signals passing through standard blocks of built in circuits known as logic gates. It is a building block of digital system. The relationship between input and output is based certain logic. Electronic circuits is made up of the combination of multiple logic gates of different types.
Fundamental Types of Logic Gates:
 NOT Gate
 AND Gate
 OR Gate
 XOR Gate
 NAND Gate
 NOR Gate
 Exclusive NOR Gate
NOT Gate
NOT Gate accepts one input signal (0 or 1) and returns the opposite signal as output.
Boolean Expression : A = A'
Truth Table :
Input

Outpt

A

A’

0

1

1

0

AND Gates
Inputs

Output


A

B

C = A·B

0

0

0

0

1

0

1

0

0

1

1

1

OR Gates
Boolean Expression : C = A+B
Truth Table :
Inputs

Output


A

B

C = A+b

0

0

0

0

1

1

1

0

1

1

1

1

XOR Gate
Inputs

Output
 
A

B

C= A⊕B

0

0

0

0

1

1

1

0

1

1

1

0

NAND Gate
Inputs

Output
 
A

B

C=(A·B)'

0

0

1

0

1

1

1

0

1

1

1

0

NOR Gate
Boolean Expression : C = ( A+B )'
Truth Table :
Inputs

Output


A

B

C = (A+B)’

0

0

1

0

1

0

1

0

0

1

1

0

Exclusive NOR Gate
Exclusive NOR Gate It accepts two input signals. If both input signals are same then output 1 otherwise output is 0.
Logic diagram symbol :
Inputs

Output
 
A

B

C =A⊙B

0

0

1

0

1

0

1

0

0

1

1

1

Conclusion:
In this article, we have thoroughly read about Logic gates and its types with brief description of each fundamental logic gates. Types of fundamental logic gates are:
 NOT Gate
 AND Gate
 OR Gate
 XOR Gate
 NAND Gate
 NOR Gate
 Exclusive NOR Gate
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Tags: Logic Gates, Fundamental types of Logic Gates, NOT Gate, AND Gate, OR Gate, XOR Gate, NAND Gate, NOR Gate, Exclusive NOR Gate, Truth Table of Logic Gates, Boolean Expression of Logic Gates, Logic Diagram Symbol of Logic Gates
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