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Analog ElectronicsFeedback Amplifiers

Which feedback topology is commonly used to obtain a voltage amplifier with increased input resistance and reduced output resistance?

  • AVoltage-series feedback
  • BVoltage-shunt feedback
  • CCurrent-series feedback only for current output
  • DCurrent-shunt feedback
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Correct Answer: A. Voltage-series feedback
Explanation: Series mixing raises input resistance and voltage sampling lowers output resistance, which is desirable for a voltage amplifier.
Reference: Standard analog electronics: feedback amplifiers
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