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Analog Electronics Operational Amplifier Applications

A practical op-amp differentiator is commonly bandwidth-limited with additional resistive/capacitive components mainly because an ideal differentiator strongly amplifies?

AHigh-frequency noise
BDC only
CPower-supply current only
DCommon-mode voltage only

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Correct Answer: A. High-frequency noise

Explanation: The ideal differentiator's gain rises with frequency, making it highly sensitive to high-frequency noise and stability problems; practical designs limit this gain.

Reference: Standard analog electronics: practical differentiator

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