Consider the pulse shape s(t) as shown. The impulse response h(t) of the filter matched to this pulsed is

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
No Explanation available for this question

Assuming zero initial condition, the response y(t) of the system given below to a unit step input u(t) is

1.   u(t)

2.  tu(t)

3.   t2/2(t)

4.  e-tu(t)

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4
Correct Answer :

tu(t)


Explanation :
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The magnitude and phase transfer functions for a distortion less filter should respectively

1.  (Magnitude)   (Phase) Linear       Constant

2.  (Magnitude)   (Phase) Constant     Constant

3.  (Magnitude)   (Phase) Constant   Linear

4.  (Magnitude)   (Phase) Linear         Linear

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4
Correct Answer :

(Magnitude)   (Phase)

Linear         Linear


Explanation :
No Explanation available for this question

The pole-zero pattern of a certain filter is shown in Fig.1. The filter must be of the following type

1.   Low –pass

2.  High-pass

3.  All-pass

4.  Band-pass

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4
Correct Answer :

All-pass


Explanation :
No Explanation available for this question

A band limited signal is sampled at the Nyquist rate. The signal can be recovered by passing the samples through

1.   An RC filter

2.  An envelope detector

3.  A PLL

4.  An ideal low-pass filter with the appropriate bandwidth

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4
Correct Answer :

An ideal low-pass filter with the appropriate bandwidth


Explanation :
No Explanation available for this question

A band-limited signal with a maximum frequency of 5 khz is to be sampled According to the sampling theorem, the samplimg frequency which is not valid is

1.  5 kHz

2.   12 kHz

3.  15 kHz

4.  20 kHz

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4
Correct Answer :

5 kHz



Explanation :
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A 4 GHz carrier is DSB_SC modulated by a low pass message signal with maximum frequency of 2 MHz. The resultant signal is to be ideally  samples. The minimum frequency of the sampling impulse train should be

1.   4 MHz

2.  8 MHz

3.  8 GHz

4.  8.004 GHz

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4
Correct Answer :

8 MHz


Explanation :
No Explanation available for this question

The Nyquist sampling interval, for the signal (700t)+Sinc(500t) is

1.  (1/350)sec

2.  (π/350)sec

3.  (1/700)sec

4.  (π/175)sec

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4
Correct Answer :

(1/700)sec


Explanation :
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The Nyquist sampling rate for the signal s(t)=(sin(500πt)/πt)X(sin(700πt)/πt) is given by

1.   400 Hz

2.  600 Hz

3.  1200 Hz

4.  1400 Hz

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4
Correct Answer :

1200 Hz


Explanation :
No Explanation available for this question

Let δ(t) denote the delta function. The value of the integral

1.   1

2.  -1

3.  0

4.  π/2

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4
Correct Answer :

1



Explanation :
No Explanation available for this question
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