Feedback Amplifier - 1
Authored by Indranath Sarkar
Professional Development
University
Used 9+ times
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The term (1+Aβ) is called as
De-sensitivity
Sensitivity
Loop Gain
None
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is correct with respect to transresistance amplifier?
Output current is proportional to the signal current
Output voltage is proportional to the signal current
Output voltage is proportional to the signal voltage
Output current is proportional to the signal voltage
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When current feedback (negative) is applied to an amplifier, its output impedance....
is decreased
is increased
remains the same
none of the above
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The essential conditions for sustained oscillation are
|Aβ|=1 & ∠Aβ=0
|Aβ<1 & ∠Aβ=0
|Aβ|>1 & ∠Aβ=0
|Aβ|<1 & ∠Aβ=180o
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The degenerative feedback amplifier overall gain is given by
Af = A/(1+Aβ)
Af = 1+Aβ
Af = A/(1-Aβ)
Af = 1-Aβ
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