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Analog ElectronicsDifferential Amplifiers

An op-amp has CMRR = 100 dB. The linear ratio Ad/Acm is?

  • A100
  • B1000
  • C10000
  • D100000
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Correct Answer: D. 100000
Explanation: CMRR(dB)=20log10(Ad/Acm), so the ratio is 10^(100/20)=10^5=100000.
Reference: Standard analog electronics: differential amplifiers
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