
ELL727 weekly quiz-3
Quiz
•
Engineering
•
University
•
Hard
Vivek Venkataraman
Used 9+ times
FREE Resource
Enhance your content in a minute
5 questions
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1.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Consider a DAC having a reconstruction pulse of the form p(t) = e-2tu(t). The equalizer filter E(f) needed to reconstruct the original analog signal from its sampled values must have a dc response E(f = 0) =
2.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Consider a sinusoidal signal at 6-MHz sent through a system consisting of an ideal ADC taking samples every 100-ns followed by an ideal DAC for this sampling rate. The output signal is a sinusoid with a frequency (in MHz) of
3.
FILL IN THE BLANK QUESTION
1 min • 1 pt
If the Nyquist sampling rate for a band-limited signal x(t) is F, then the Nyquist rate for the signal x(t)cos(2πFt) is
4.
FILL IN THE BLANK QUESTION
1 min • 1 pt
A signal x(t) is band-limited to 3 kHz. It is first sampled at a rate fs kHz, and then reconstructed using a LPF having zero amplitude response only beyond 5 kHz. The minimum value of fs for perfect distortion-free reconstruction of x(t) is
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The Nyquist sampling rate for the signal x(t) = sinc(f1t).sinc(f2t), where sinc(x) = sin(πx)/(πx), is
max(f1,f2)
min(f1,f2)
f1 + f2
|f1 - f2|
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