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Q#1
MOSFET
GATE EC 2023
MCQ
+1 mark
-0.33 marks
A cascade of common-source amplifiers in a unity gain feedback configuration oscillates when
the closed loop gain is less than 1 and the phase shift is less than 
.
the closed loop gain is greater than 1 and the phase shift is less than .
the closed loop gain is less than 1 and the phase shift is greater than .
the closed loop gain is greater than 1 and the phase shift is greater than .
Explanation:
Marks to all
For sustained oscillation
(i) Loop gain magnitude 
(ii) Phase of loop gain 
or 
So, correct answer is option (d).
* In options, closes loop gain is mentioned technically it should be loop gain.
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