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
Electronics and Communication Engineering
Electronic Devices and Circuits
Choose an option
-
A1/11 kΩ
-
B1/5 kΩ
-
C5 kW
-
D11 kW
Answer
Correct Answer: 1/11 kΩ
Explanation
Input Resistance with feedback for current shunt, ![]()
.