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Consider a voltage series feedback network, where amplifier gain = 100, feedback factor = 5. For the basic amplifier, input voltage = 4V, input current=2mA. Find the input resistance of the network.
  • a)
    1.002kΩ
  • b)
    1002kΩ
  • c)
    2kΩ
  • d)
    2000kΩ
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Consider a voltage series feedback network, where amplifier gain = 100...
RI = VI/II = 4/2m = 2kΩ
RIF = RI(1+A.β) = 2k(1+500)
= 1002kΩ.
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Consider a voltage series feedback network, where amplifier gain = 100, feedback factor = 5. For the basic amplifier, input voltage = 4V, input current=2mA. Find the input resistance of the network.a)1.002kΩb)1002kΩc)2kΩd)2000kΩCorrect answer is option 'B'. Can you explain this answer?
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