LOGIC GATES
AND · OR · NOT · LIVE INPUTS
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Logic Gates
AND
OR
NOT
A
B
A·B
A+B
Ā
A·B =
AND output
A+B =
OR output
Ā =
NOT A
1. Truth Table
A
B
A·B
A+B
Ā
0
0
0
0
1
0
1
0
1
1
1
0
0
1
0
1
1
1
1
0
2. Boolean Expressions
X = A · B
Y = A + B
Z = Ā
AND
OR
NOT (inverter)
3. Remember
AND: 1 only if both are 1
OR: 1 if either is 1
MATRIC COMPUTER · DIGITAL LOGIC · PUNJAB BOARDS
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