1
GATE ECE 2023
MCQ (Single Correct Answer)
+1
-0.33

A cascade of common-source amplifiers in a unity gain feedback configuration oscillates when

A
the closed loop gain is less than 1 and the phase shift is less than 180$$^\circ$$.
B
the closed loop gain is greater than 1 and the phase shift is less than 180$$^\circ$$.
C
the closed loop gain is less than 1 and the phase shift is greater than 180$$^\circ$$.
D
the closed loop gain is greater than 1 and the phase shift is greater than 180$$^\circ$$.
2
GATE ECE 2014 Set 3
MCQ (Single Correct Answer)
+1
-0.3
The desirable characteristics of a transconductance amplifier are
A
high input resistance and high output resistance
B
high input resistance and low output resistance
C
low input resistance and high output resistance
D
low input resistance and low output resistance
3
GATE ECE 2014 Set 2
MCQ (Single Correct Answer)
+1
-0.3
The feedback topology in the amplifier circuit (the base bias circuit is not shown for simplicity) in the figure is GATE ECE 2014 Set 2 Analog Circuits - Feedback Amplifier Question 13 English
A
Voltage shunt feedback.
B
Current series feedback.
C
Current shunt feedback.
D
Voltage series feedback.
4
GATE ECE 2014 Set 1
MCQ (Single Correct Answer)
+1
-0.3
A good current buffer has
A
low input impedance and low output impedance.
B
low input impedance and high output impedance.
C
high input impedance and low output impedance.
D
high input impedance and high output impedance.
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