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Question 431

What absolute voltage gain can be expected from the circuit in Figure E7-3 when R1 is 1,800 ohms and RF is 68 kilohms?

Schematic of a circuit with a triangular three-terminal component, resistor R1 at the input, and resistor RF connecting output to input.
  1. 1
  2. 0.03
  3. 38Correct answer
  4. 76

Explanation

Absolute gain of the inverting stage is RF / R1 = 68,000 Ω / 1,800 Ω = 37.8, which rounds to 38. A gain of 76 is twice that value and 0.03 is the reciprocal.

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Question 431: What absolute voltage gain can be expected from the circuit… · FCC Amateur Extra Class (Element 4) · Questena