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GATE 2014 EC (EC1) – Question 22

Analog Circuits · BJT and MOSFET Amplifiers · 1 mark · Multiple choice

For the AC-equivalent circuit shown, iᵢₙ is the input current and R_F is very large. Identify the feedback type.

Diagram for GATE 2014 EC (EC1) question 22
  1. voltage-voltage feedback
  2. voltage-current feedback
  3. current-voltage feedback
  4. current-current feedback

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Show answer and explanation

Correct answer: (B) voltage-current feedback

Explanation

The feedback resistor connects the output voltage to the input current-summing node. The feedback network therefore samples output voltage in shunt and mixes feedback current in shunt at the input. In the question’s output-sampling/input-mixing terminology this is **voltage-current feedback,B**, a transresistance configuration.