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When an amplifier is provided with current-shunt feedback, its
- a)input impedance increases and output impedance decreases.
- b)input impedance decreases and output impedance increases.
- c)input and output impedances both increases.
- d)input and output impedances both decreases.
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
When an amplifier is provided with current-shunt feedback, itsa)input ...
Most Upvoted Answer
When an amplifier is provided with current-shunt feedback, itsa)input ...
Series FB connection= increase IP imp......
Shunt FB connection= decrease IP imp.....
Voltage FB connection= decrease OP imp......
Current FB connection= increase OP imp.......
so when current shunt fb is applied, IP imp decreases and OP imp increases. Thats y option B ^_^
Shunt FB connection= decrease IP imp.....
Voltage FB connection= decrease OP imp......
Current FB connection= increase OP imp.......
so when current shunt fb is applied, IP imp decreases and OP imp increases. Thats y option B ^_^
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When an amplifier is provided with current-shunt feedback, itsa)input ...
Explanation:
When an amplifier is provided with current-shunt feedback, it means that a portion of the output current is fed back to the input of the amplifier. This feedback configuration has a significant impact on the input and output impedances of the amplifier.
Effect on Input Impedance:
- The input impedance of an amplifier is the impedance seen at its input terminals.
- In the case of current-shunt feedback, the feedback current is injected into the input of the amplifier in parallel with the input signal.
- This additional current reduces the effective input impedance seen by the input signal.
- Therefore, the input impedance decreases when current-shunt feedback is provided.
Effect on Output Impedance:
- The output impedance of an amplifier is the impedance seen at its output terminals.
- In the case of current-shunt feedback, a portion of the output current is shunted back to the input.
- This feedback current reduces the effective output impedance seen by the load.
- Therefore, the output impedance increases when current-shunt feedback is provided.
Summary:
- When an amplifier is provided with current-shunt feedback, the input impedance decreases and the output impedance increases.
- This is because the feedback current injected at the input reduces the effective input impedance, while the feedback current shunted from the output increases the effective output impedance.
In conclusion, the correct answer is option 'B' - the input impedance decreases and the output impedance increases when an amplifier is provided with current-shunt feedback.
When an amplifier is provided with current-shunt feedback, it means that a portion of the output current is fed back to the input of the amplifier. This feedback configuration has a significant impact on the input and output impedances of the amplifier.
Effect on Input Impedance:
- The input impedance of an amplifier is the impedance seen at its input terminals.
- In the case of current-shunt feedback, the feedback current is injected into the input of the amplifier in parallel with the input signal.
- This additional current reduces the effective input impedance seen by the input signal.
- Therefore, the input impedance decreases when current-shunt feedback is provided.
Effect on Output Impedance:
- The output impedance of an amplifier is the impedance seen at its output terminals.
- In the case of current-shunt feedback, a portion of the output current is shunted back to the input.
- This feedback current reduces the effective output impedance seen by the load.
- Therefore, the output impedance increases when current-shunt feedback is provided.
Summary:
- When an amplifier is provided with current-shunt feedback, the input impedance decreases and the output impedance increases.
- This is because the feedback current injected at the input reduces the effective input impedance, while the feedback current shunted from the output increases the effective output impedance.
In conclusion, the correct answer is option 'B' - the input impedance decreases and the output impedance increases when an amplifier is provided with current-shunt feedback.
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When an amplifier is provided with current-shunt feedback, itsa)input impedance increases and output impedance decreases.b)input impedance decreases and output impedance increases.c)input and output impedances both increases.d)input and output impedances both decreases.Correct answer is option 'B'. Can you explain this answer?
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