Exam-style question
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Op-amp comparator ? select the output rule. Use this to support: Explain duty cycle qualitatively.
- A.op-amp comparator: the output saturates high or low depending on which input voltage is larger for Astables.
- B.op-amp comparator: uses gradual proportional gain only.
- C.op-amp comparator: treats both inputs as earth.
- D.op-amp comparator: omits the supply-rail limit.
Model answer
What a good answer should say
- The correct option is op-amp comparator: the output saturates high or low depending on which input voltage is larger for Astables.
Explanation
Why this works
This is the best answer because the op-amp comparator context requires that exact electronics relationship. The other options are incorrect because they use a different component, reverse the circuit behaviour, or omit the output interpretation required for Astables.
Common mistake
No common mistake is linked to this question yet.