A basic generalized form of comparator is ______.

A basic generalized form of comparator is ______.

a. Zero-Crossing Detector
b. Sine to Square Wave Generator
c. Both
d. None

Correct Answer : c. Both

Explanation :

The comparator can be configured to be useful in the form of Zero-Crossing Detector by just adjusting reference voltage to zero. There is sometimes possibility that low frequency signal may consume some more time to cross zero volt because of which output voltage cannot switch over instantaneously from one saturation region to another. Also, the noise at the op-amp input terminals may fluctuate the output between positive & negative (+Vsat & -Vsat) saturation voltages. Hence, both the shortcomings can be resolved by using positive or (regenerative) feedback.