Operational Amplifier

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  • Created by: jwgcurrie
  • Created on: 08-12-19 19:46

1. How does power supply rejection ratio affect op-amp design

  • Only of importance if the power supply is noisy
  • This is only of importance if the power supply is poorly regulated or noisy
  • Only of importance if the power supply is poorly regulated
  • Only of importance if the power supply is 3-phase
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2. What does this definition apply to: The voltage that must be applied between the inverting and non-inverting inputs to bring the output voltage to 0

  • Common mode Rejection Ratio
  • Offset Voltage
  • Input Offset Voltage
  • Input Bias Voltage

3. Hoq does offset current affect op-amp design

  • Mismatched current flow in the inputs of the op-amp, causing slight DC offset to appear
  • Causes extra current to flow through the op-amp

4. How does common mode rejection ratio affect op-amp design

  • Rejects the current flow at op-amp non inverting inputs
  • If value is too low then a DC offset will appear
  • Reduces noise in power supplies

5. What does this definition apply to: Difference in the bias current between the inverting/non-inverting inputs

  • Common mode Rejection Ratio
  • Offset Current
  • Input Offset Current
  • Input Bias Current
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