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Measurements & InstrumentationSignal Conditioning

Common-mode rejection ratio of an instrumentation amplifier is the ratio of?

  • ADifferential gain to common-mode gain
  • BCommon-mode gain to differential gain
  • COutput resistance to input resistance
  • DBandwidth to gain
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Correct Answer: A. Differential gain to common-mode gain
Explanation: CMRR=Ad/Acm and indicates how strongly the amplifier rejects signals common to both inputs.
Reference: Standard measurements and instrumentation: signal conditioning
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