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) 2000kΩI had been asked this question in my homework.This intriguing question comes from Feedback Connection Types in chapter General and Feedback Amplifiers of Analog Circuits

Consider a voltage series feedback network, where amplifier gain = 100

1.	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) 2000kΩI had been asked this question in my homework.This intriguing question comes from Feedback Connection Types in chapter General and Feedback Amplifiers of Analog Circuits
Answer» CORRECT answer is (B) 1002kΩ To explain I WOULD SAY: RI = VI/II = 4/2m = 2kΩ RIF = RI(1+A.β) = 2K(1+500) = 1002kΩ.

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