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Analog ElectronicsOperational Amplifiers

An ideal op-amp differentiator has R = 100 kOhm and C = 0.01 microfarad. If the input ramp rises at 2 V/ms, the output is?

  • A-0.2 V
  • B-2 V
  • C+2 V
  • D-20 V
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Correct Answer: B. -2 V
Explanation: Vo = -RC(dVin/dt). RC = 100000×10^-8 = 0.001 s and 2 V/ms = 2000 V/s, so Vo = -2 V.
Reference: Standard analog electronics: operational amplifiers
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