Feedback is the real reason an amplifier and a comparator behave so differently, even when the same op-amp IC is used. In an amplifier, negative feedback is always present. A portion of the output is fed back to the input in opposite phase. This feedback continuously corrects the output and forces the op-amp to operate in its linear region. Because of this correction action, the output becomes a scaled, stable version of the input. Small changes at the input produce proportional changes at the o

Introduction to Feedback Amplifiers Video Lecture | Analog and Digital Electronics - Electrical Engineering (EE)