Exam-style question
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When an op-amp is driven near its supply voltage limits, what effect does this have on its bandwidth?.
- A.Bandwidth increases
- B.Bandwidth decreases
- C.Bandwidth remains unchanged
- D.Bandwidth becomes infinite
Model answer
What a good answer should say
- Bandwidth decreases
Explanation
Why this works
Rule: As the output approaches the supply rails, the op‑amp’s ability to swing at high frequencies is reduced, effectively lowering the bandwidth. Substitution: near rail limits, the output cannot follow rapid changes.
Working: The high‑frequency response is clipped, reducing effective bandwidth. Answer: bandwidth decreases.
Conclusion: Operating near supply limits reduces bandwidth.
Common mistake
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