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The voltage gain of an amplifier is 100. A negative feedback is applied with β = 0.04. The overall gain of the amplifier is:
Correct answer is '20'. Can you explain this answer?
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Verified Answer
The voltage gain of an amplifier is 100. A negative feedback is appli...
Initially the voltage gain of the amplifier is 100 i.e. A = 100.
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Then a negative feedback is applied to the amplifier where the gain of the feedback loop is given as β = 0.04
Now the overall gain of the negative feedback amplifier is given as, = A/(1+Aβ)
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The voltage gain of an amplifier is 100. A negative feedback is appli...
Solution:
Given, voltage gain of an amplifier = 100
Negative feedback is applied with β = 0.04
Overall gain of the amplifier = ?
Using the formula for overall gain with negative feedback:
A = A0 / (1 + A0β)
Where A0 = voltage gain without feedback
β = feedback factor
Substituting the given values,
A = 100 / (1 + 100 × 0.04)
= 100 / 5
= 20
Therefore, the overall gain of the amplifier is 20.
Given, voltage gain of an amplifier = 100
Negative feedback is applied with β = 0.04
Overall gain of the amplifier = ?
Using the formula for overall gain with negative feedback:
A = A0 / (1 + A0β)
Where A0 = voltage gain without feedback
β = feedback factor
Substituting the given values,
A = 100 / (1 + 100 × 0.04)
= 100 / 5
= 20
Therefore, the overall gain of the amplifier is 20.
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The voltage gain of an amplifier is 100. A negative feedback is applied with β = 0.04. The overall gain of the amplifier is:Correct answer is '20'. Can you explain this answer?
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