Loading...

Loading, please wait...

Back to Topics

Analog Electronics
MOSFET

Practice questions from MOSFET.

2
Total
0
Attempted
0%
0
Correct
0%
0
Incorrect
0%
Q#1 MOSFET GATE EE 2025 (Set 1) MCQ +1 mark -0.33 marks

Which one of the following statements is true about the small signal voltage gain of a MOSFET based single stage amplifier?

Common source and common gate amplifiers are both inverting amplifiers

Common source and common gate amplifiers are both non-inverting amplifiers

Common source amplifier is inverting and common gate amplifier is non-inverting amplifier

Common source amplifier is non-inverting and common gate amplifier is inverting amplifier

Explanation:

For common source Amplifier,

        ∴ Inverting Amplifier

For common gate Amplifier,

                 Non-Inverting Amplifier

For common drain Amplifier,

                 ∴ Non-Inverting Amplifier

Hence, Option (c) is correct.

Q#2 MOSFET GATE EE 2025 (Set 1) MCQ +2 marks -0.66 marks

In the circuit,  is an ideal current source. The transistors  and  are assumed to be biased in saturation, wherein  is the input signal and  is fixed DC voltage. Both transistors have a small signal resistance of  and trans-conductance of . The small signal output impedance of this circuit is

infinity

Explanation:

Transistors  and  are biased in saturation.

 

In AC analysis: (DC Supply) = Short Circuited

Current Source = Open circuited

 

Concept:

 

where

 

 

 

 

  

Option (c) is correct.