Exam-style question
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Which configuration is more suitable for summing multiple input signals?.
- A.Inverting amplifier is used for summing multiple signals
- B.Non‑inverting amplifier is used for summing multiple signals
- C.Both amplifiers are used for summing multiple signals
- D.Neither amplifier is used for summing multiple signals
Model answer
What a good answer should say
- Inverting amplifier is used for summing multiple signals
Explanation
Why this works
Define both: A summing amplifier typically uses an inverting op‑amp to combine several input voltages; a non‑inverting configuration is not used for summing. Identify key difference: the ability to sum signals.
Explain when each applies: use the inverting configuration when signals need to be added; the non‑inverting configuration is not suitable for summing. Conclude: the correct configuration is the inverting amplifier.
Common mistake
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