12. When an amplifier is provided with current series feedback, its :
(a)input impedance increases and output impedance decreases (b)input and output impedances both decrease (c)input impedance decreases and output impedance increases (d)input and output impedances both increase
Answer
Answer : (d)
Explanation
Explanation : No answer description available for this question. Let us discuss.
Feedback Amplifiers » Exercise - 19. The shunt-derived series-fed feedback in an amplifier : (a) increases its output impedance (b) decreases its output impedance (c) increases its input impedance (d) both (b) and (c)
Feedback Amplifiers » Exercise - 12. Feedback in an amplifier always helps to : (a) control its output (b) increase its gain (c) decrease its input impedance (d) stabilize its gain
5555555555126. As the frequency increases, the input impedance of an op-amp ________ and the output impedance ________. (a) increases, increases (b) increases, decreases (c) decreases, decreases (d) decreases, increases
Operational Amplifier » Exercise - 118. Negative feedback .... (a) increases the input and output impedances (b) increases the input impedance and bandwidth (c) decreases the output impedance and bandwidth (d) does not affect impedance or bandwidth
Amplifiers » Exercise - 131. When current feedback (negative) is applied to an amplifier, its output impedance ...... (a) is increased (b) is decreased (c) remains the same (d) none of the above
Feedback Amplifiers » Exercise - 19. The shunt-derived series-fed feedback in an amplifier : (a) increases its output impedance (b) decreases its output impedance (c) increases its input impedance (d) both (b) and (c)