Q. Why clamp diodes are used in comparator?

A
To reduce output offset voltage
B
To increase gain of op-amp
C
To reduce input offset current
D
To protect op-amp from damage
Solution:

The diodes protect the op-amp from damage due to excessive input voltage. Because of these diodes the difference input voltage of the op-amp is clamped to 0.7v or -0.7 v, hence these diodes are clamp diodes.

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