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Analog ElectronicsNoise in Analog Circuits

An amplifier has an input SNR of 40 dB and output SNR of 34 dB. Its noise figure is approximately?

  • A3 dB
  • B6 dB
  • C34 dB
  • D74 dB
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Correct Answer: B. 6 dB
Explanation: Noise figure in decibels is SNRin(dB)-SNRout(dB)=40-34=6 dB.
Reference: Standard analog electronics: noise figure numerical
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