Logic Gates

 

GATES

SYMBOL

Logic Equation

TRUTH TABLE

 

 

 

OR GATE

 

 

 

 

 

Y=A+B

 

A

B

Y

0

0

0

0

1

1

1

0

1

1

1

1

                                

 

 

 

AND GATE

 

 

 

 

 

 

Y=A·B

 

A

B

Y

0

0

0

0

1

0

1

0

0

1

1

1

                          

 

 

NOT GATE

 

 

Y=A’

 

A

Y

0

1

1

0

                         

 

 

 

NOR GATE

 

 

 

 

 

Y=(A+B)’

 

A

B

Y

0

0

1

0

1

0

1

0

0

1

1

0

           

 

 

 

NAND GATE

 

 

 

 

 

Y=(A·B)’

 

A

B

Y

0

0

1

0

1

1

1

0

1

1

1

0

           

 

 

EX-OR

 

 

 

 

 

Y=(A’·B)+(A·B’)

 

A

B

Y

0

0

0

0

1

1

1

0

1

1

1

0

           

 

 

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