In a negative feedback amplifier, the output impedance is decreased
- A. If the signal sampled is a voltage
- B. If the signal sampled is a current
- C. If the feedback signal is a voltage
- D. If the feedback signal is a current
Answer: A. If the signal sampled is a voltage
Explanation: Voltage sampling (shunt connection at output) stabilizes output voltage and reduces closed-loop output impedance by (1 + Aβ), whereas current sampling increases it.