NAND
Gate:
Gate:
A NAND gate is formed by coupling a NOT
gate with the output terminal of the AND gate.
gate with the output terminal of the AND gate.
The NOT gate inverts the output of the AND
gate. The output of the NAND gate is
written as
gate. The output of the NAND gate is
written as
X = (A.B) ̅.
It is read as X equals A AND B NOT.
It is read as X equals A AND B NOT.
Symbol:
The NAND gate has been symbolically shown
In this figure, the NOT gate has been replaced with a small circle.
In this figure, the NOT gate has been replaced with a small circle.
In the symbol of NAND gate, this small
circle attached at the output of AND gate shows NOT operation.
circle attached at the output of AND gate shows NOT operation.
NOR
Gate:
Gate:
A NOR gate is formed by coupling a NOT
gate with the output terminal of the OR gate.
gate with the output terminal of the OR gate.
The NOT gate inverts the output of the OR
gate. The output of the NOR gate is
written as
gate. The output of the NOR gate is
written as
X = (A+B) ̅.
It is read as X equals A OR B NOT.
It is read as X equals A OR B NOT.
Symbol:
The NOR gate has been symbolically shown
In this figure, the NOT gate has been replaced with a small circle.
In this figure, the NOT gate has been replaced with a small circle.
In
the symbol of NOR gate, this small circle attached at the output of OR gate
shows NOT operation. Table given is the
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