Electronics and Communication Engineering - Electronic Devices and Circuits - Discussion
Discussion Forum : Electronic Devices and Circuits - Section 1 (Q.No. 22)
22.
An amplifier without feedback has a voltage gain of 50, input resistance of 1 kΩ and output resistance of 2.5 kΩ. The input resistance of the current shunt -ve feedback amplifier using the above amplifier with a feedback factor of 0.2 is
Answer: Option
Explanation:
Input Resistance with feedback for current shunt, 
.
Discussion:
11 comments Page 2 of 2.
Kartikey said:
3 years ago
1/11 is wrong answer, because in question voltage gain is given but there is a mixing of current so first we have.
To calculate current gain then we will use formula A/1+BA.
Thankyou!
To calculate current gain then we will use formula A/1+BA.
Thankyou!
(1)
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