Basic Logic gates
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Logic Gates
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Transcript of Basic Logic gates
Logic Gates
2/6/2015 Mr.Pravin Shirke 2
Logic Gate AND
Bulb
Power
Supply
A B
2/6/2015 Mr.Pravin Shirke 3
Logic Gate AND
Bulb
Power
Supply
A B
2/6/2015 Mr.Pravin Shirke 4
Logic Gate AND
Bulb
Power
Supply
A B
2/6/2015 Mr.Pravin Shirke 5
Logic Gate AND
Bulb
Power
Supply
A B
2/6/2015 Mr.Pravin Shirke 6
Logic Gate AND
Bulb
Power
Supply
A B
2/6/2015 Mr.Pravin Shirke 7
Logic Gate AND
Bulb
Power
Supply
A B
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Logic Gate AND
Bulb
Power
Supply
A B
Output of AND Logic Gate is High when Both
Inputs (A & B Switch )at are High (Closed).
2/6/2015 Mr.Pravin Shirke 9
Logic Gate AND
From above Fig.
Switch A Switch B Bulb
OFF OFF
ON OFF
OFF ON
ON ON
2/6/2015 Mr.Pravin Shirke 10
Logic Gate AND
Truth Table
Input A Input B Y=A.B
0 0 0
0 1 0
1 0 0
1 1 1
Logical Expression:
A and B = A.B =Y
A
BY=A.B
2/6/2015 Mr.Pravin Shirke 11
Logic Gate OR
Bulb
Power
Supply
A
B
2/6/2015 Mr.Pravin Shirke 12
Logic Gate OR
Bulb
Power
Supply
A
B
2/6/2015 Mr.Pravin Shirke 13
Logic Gate OR
Bulb
Power
Supply
A
B
2/6/2015 Mr.Pravin Shirke 14
Logic Gate OR
Bulb
Power
Supply
A
B
2/6/2015 Mr.Pravin Shirke 15
Logic Gate OR
Bulb
Power
Supply
A
B
2/6/2015 Mr.Pravin Shirke 16
Logic Gate OR
Bulb
Power
Supply
A
B
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Logic Gate OR
Output of OR Logic Gate is Low when Both Inputs
(A & B Switch ) are Low (Open).
Bulb
Power
Supply
A
B
2/6/2015 Mr.Pravin Shirke 18
Logic Gate OR
From above Fig.
Switch A Switch B Bulb
OFF OFF
ON OFF
OFF ON
ON ON
2/6/2015 Mr.Pravin Shirke 19
Logic Gate OR
Truth Table
Input A Input B Y=A.B
0 0 0
0 1 1
1 0 1
1 1 1
Logical Expression:
A Or B = A+B =Y
A
BY=A.B
Power
Supply
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Logic Gate NOT
BulbA
Power
Supply
2/6/2015 Mr.Pravin Shirke 21
Logic Gate NOT
BulbA
Power
Supply
2/6/2015 Mr.Pravin Shirke 22
Logic Gate NOT
BulbA
2/6/2015 Mr.Pravin Shirke 23
Logic Gate NOT
From above Fig.
Switch A Bulb
OFF
ON
2/6/2015 Mr.Pravin Shirke 24
Logic Gate NOT
Truth Table
Input A Y=A
0 1
1 0
Logical Expression:
Y= AA Y=A
