The type of feedback network and feedback factor for the amplifier shown below is

1.  

2.  

3.  

4.  

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question

Consider the following statement with respect to R.C coupled amplifier 1. The low frequency response is determined by the transistor junction capacitance 2. The high frequency response is limited by coupling capacitors 3. The miller capacitance reduces the gain at high frequencies 4. As the gain is increased the bandwidth gets reduced Which of the above statements are correct

1.  1 and 2

2.  2 and 3

3.  3 and 4

4.  1 and 4

View Answer  
4
Correct Answer :

3 and 4


Explanation :
No Explanation available for this question

Which of the following represents correct output wave form of the circuit shown below (consider diode to be piece wise linear model having zero forward resistance)

1.  

2.  

3.  

4.  

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question

Trans conductance gain of the amplifier is

1.   -1mA/V

2.   -1 A/V

3.  -50 m A/V

4.  -50 A/V

View Answer  
4
Correct Answer :

-50 m A/V


Explanation :
No Explanation available for this question

An NPN transistor with C=0.3PF has a unity gain cutoff frequency fT of 400MHz at a D.C bias current Ic=1mA. The value of its Cμ (in PF) at 300K is approximately

1.  15

2.  30

3.  50

4.  96

View Answer  
4
Correct Answer :

15


Explanation :
No Explanation available for this question

The value of Re and RL is respectively

1.  0.5kΩ, 2kΩ

2.  1 kΩ, 2kΩ

3.   1 kΩ, 4kΩ

4.  0.5kΩ, 8kΩ

View Answer  
4
Correct Answer :

1 kΩ, 4kΩ


Explanation :
No Explanation available for this question

An amplifier is assumed to have a single pole high frequency transfer function. The rise time of its output response to a step function input is 35n sec. The upper 3dB Frequency ( in MHz) for this amplifier to a sinusoidal input is approximately

1.  4.55

2.  10

3.  20

4.  28

View Answer  
4
Correct Answer :

10


Explanation :
No Explanation available for this question

Over all input impedance Rif of the feedback amplifier is

1.  100kΩ

2.  45kΩ

3.  50kΩ

4.  150kΩ

View Answer  
4
Correct Answer :

150kΩ


Explanation :
No Explanation available for this question

Find Vx & Vy of the following circuits. If the signal is sinusoidal signal having peak value Vm(Assumes diodes are ideal)

1.  Vx=2Vm, Vy=3Vm

2.  Vx=Vm, Vy=2Vm

3.   Vx=3Vm, Vy=3Vm

4.  Vx=3Vm, Vy=2Vm

View Answer  
4
Correct Answer :

Vx=3Vm, Vy=2Vm


Explanation :
No Explanation available for this question

If voltage equivalent temperature is 26m V then value of IC is

1.  3.9 mA

2.  5.1 mA

3.  1.2 mA

4.   None

View Answer  
4
Correct Answer :

3.9 mA


Explanation :
No Explanation available for this question
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