For the amplifier shown in the figure given below, the lower cut-off frequency depends on

1.  CS, CE, internal capacitances of transistor

2.  Strong wiring capacitance (CW), CC

3.  CS, CE, CC

4.  CS, CE only

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4
Correct Answer :

CS, CE, CC


Explanation :
No Explanation available for this question

In an amplifier, the power output is 2W at 5 KHz, and 0.5W at 50Hz. If the input power is constant at 10mW, what is the variation (approximate) of power gain in dB at two frequencies (log102=0.30)

1.  6dB

2.  8dB

3.  3dB

4.  16dB.

View Answer  
4
Correct Answer :

6dB


Explanation :
No Explanation available for this question

A tuned amplifier has peak output at 2MHz and quality factor 50. The bandwidth and 3-dB frequencies shall be at what values respectively

1.  40MHz, 2.02MHz,1.98MHz

2.  40MHz,2.04MHz,1.96MHz

3.  80MHz,2.04MHz,1.96MHz

4.  80MHz, 2.08MHz, 1.92MHz.

View Answer  
4
Correct Answer :

40MHz,2.04MHz,1.96MHz


Explanation :
No Explanation available for this question

What is the output voltage V0 of the circuit below

1.  -11V

2.  6V

3.  11V

4.  -6V.

View Answer  
4
Correct Answer :

-11V


Explanation :
No Explanation available for this question

The transistor circuit shown in the figure given below is to function as an amplifier. If IC =3mV, what is the value of VCC approximate

1.  15V

2.  -15V

3.  -10V

4.  -13.5V.

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4
Correct Answer :

-15V


Explanation :
No Explanation available for this question

An amplifier as an open loop gain of 1000±10. Negative feedback is provided such that the gain variation remains within 0.1%. What is the amount of feedback bF

1.  1/10

2.  1/9

3.  9/100

4.  9/1000.

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4
Correct Answer :

1/9


Explanation :
No Explanation available for this question

The two stages of a cascade amplifier have individual upper cut-off frequencies f1=5 MHz and f2=3.33MHz. What is the best approximation for the upper cut-off frequency of the cascade combination

1.  4.16MHz

2.  3.33MHz

3.  2.5MHz

4.  5.00MHz.:

View Answer  
4
Correct Answer :

5.00MHz.:


Explanation :
No Explanation available for this question

Select the correct output (v0) wave-shape for the given input (vi) in the clamping network given below

1.  

2.  

3.  

4.  

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question

The transfer function of a transistor amplifier given by Av = Which one of the following gives the approximate upper 3-dB frequency fH of the amplifier

1.  4 × 105 Hz

2.  2.2 × 106 Hz

3.  4 × 106 Hz

4.  4.4 × 106 Hz

View Answer  
4
Correct Answer :

4 × 105 Hz


Explanation :
No Explanation available for this question

Consider the following circuit What is the function of diode D2 in the given circuit

1.  To avoid saturation of Op-amp

2.  To provide negative feedback when the input is negative

3.  To reduce reverse break down voltage of D1

4.  As a buffer.

View Answer  
4
Correct Answer :

To avoid saturation of Op-amp


Explanation :
No Explanation available for this question
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