Qno2 Explain with help of symbolic duagram and truth table (2 input 3 the function of an inverter,Or gate,And gate,Nor gate,NAND gate and XOR gate.

Logic gates are useful in the construction of digital systems.

OR gate:

It gives a high output 1 if one or more of its inputs are high.  In this + is used to show the OR operation.

 Symbolic diagram:

Truth table:

AND gate:

AND Gate gives a high output 1 only if all its inputs are high.  A dot (.) is used to show the AND operation.

Symbolic diagram:

Truth table:

NOR gate:

NOR Gate means NOT-OR gate i.e an OR gate followed by a NOT gate.  The outputs of all NOR gates are low if any of the inputs are high.

Symbolic diagram:

Truth table:

NAND Gate:

NAND Gate means NOT-AND gate i.e an AND gate followed by a NOT gate.  The outputs of all NAND gates are high if any of the inputs are low.

Symbolic diagram:

Truth table:

XOR Gate:(Exclusive OR)

XOR Gate gives high output if either, but not both, of its two inputs are high.

Symbolic diagram:

Truth table:

Inverter or NOT Gate:Inverter produces an inverted version of the input at its output.For example if the input is A, the inverted output is known as NOT A.  This is also shown as A with a bar over the top.
Symbolic diagram:

Truth table
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