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Logic Gate
*A large number of electronic circuits are made up of logic gates. These process signals
which represent true or false.
*There are Three types of basic gate:
Symbol Function Truth table
1.AND Gate:
Y=A.B
2.OR Gate:
Y=A+B
3.NOT Gate:
Z=X’
*There are two types of Universal logic gate:
Symbol Function Truth table
1.NAND Gate:
Z= (A.B)’
2.NOR Gate:
Y= (A+B)’
Symbol Function Truth table
1.BUFFER Gate:
Y=A
2.XOR Gate:
Y=AB’+A’B
3.XNOR Gate:
C=AB+A’B’

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Logic gate

  • 1. Logic Gate *A large number of electronic circuits are made up of logic gates. These process signals which represent true or false. *There are Three types of basic gate: Symbol Function Truth table 1.AND Gate: Y=A.B 2.OR Gate: Y=A+B 3.NOT Gate: Z=X’
  • 2. *There are two types of Universal logic gate: Symbol Function Truth table 1.NAND Gate: Z= (A.B)’ 2.NOR Gate: Y= (A+B)’
  • 3. Symbol Function Truth table 1.BUFFER Gate: Y=A 2.XOR Gate: Y=AB’+A’B 3.XNOR Gate: C=AB+A’B’