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Analog ElectronicsOperational Amplifiers

An ideal inverting op-amp uses Rin=5 kOhm and Rf=20 kOhm with Vin=0.5 V. The output is?

  • A+2 V
  • B-2 V
  • C+4 V
  • D-4 V
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Correct Answer: B. -2 V
Explanation: Av=-Rf/Rin=-4, so Vo=-4×0.5=-2 V.
Reference: Standard analog electronics: inverting amplifier
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