Digital Logic Gates

Logic AND Gate 

A Logic AND gate is type of digital logic that is LOW when any one of the input is low. It will be HIGH when both the input is HIGH.

Symbol of AND Gate

Truth Table of AND Gate

Output= A*B

Truth Table

Output is the multiplication of both the inputs. If any input is zero output must be zero.


Logic OR Gate 

A Logic OR gate is type of digital logic that is HIGH when any one of the input is HIGH. It will be LOW when both the input is LOW.
Symbol

OR Gate symbol

Truth Table of OR Gate

Output= A+B

Truth Table of OR Gate

Output is the addition of both the inputs. If any input is one output must be one.

Logic NOT Gate 

A Logic NOT gate is type of digital logic that is HIGH when input is LOW. It will be LOW when input is HIGH. It always invert the input.

Symbol

NOT Gate symbol

 

Output= Ā

Truth Table of  Gate

Truth Table of NOT Gate

Output is the invert of the Input. If it is '1' then output will be '0' and vice versa.