Discussion
Why must a comparator not be compensated like an amplifier?
Answer: D
A dominant pole placed to guarantee stability in a feedback loop limits how fast the output can move, and a comparator is never used in a linear loop - it is wanted to switch as quickly as possible. Offset, common-mode range and bias current are unaffected. That two devices sharing an input stage are compensated in opposite ways, according to whether they will be used linearly or as a switch, is why substituting one for the other rarely works. Framing the question as which quantity the change acts upon makes the answer follow without calculation.
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