1
GATE ECE 2001
MCQ (Single Correct Answer)
+1
-0.3
A band limited signal is sampled at the Nyquist rate. The signal can be recovered by passing the samples through
A
an RC filter
B
an envelope detector
C
a PLL
D
an ideal low-pass filter with the appropriate bandwidth
2
GATE ECE 1998
MCQ (Single Correct Answer)
+1
-0.3
Flat top sampling of low pass signals
A
gives rise to aperture effects
B
implies over sampling
C
leads to aliasing
D
introduces delay distortion
3
GATE ECE 1995
MCQ (Single Correct Answer)
+1
-0.3
A 1.0 kHz signal is flat - top sampled at the rate of 1800 samples/sec and the samples are applied to an ideal rectangular LPF with cut - off frequency of 1100 Hz, then the output of the filter contains
A
only 800 Hz component.
B
800 Hz and 900 Hz components.
C
800 Hz and 1000 Hz components.
D
800 Hz, 900 Hz and 1000 Hz components.
4
GATE ECE 1994
MCQ (Single Correct Answer)
+1
-0.3
Increased pulse-width in the flat-top sampling, leads to GATE ECE 1994 Signals and Systems - Sampling Question 29 English
A
attenuation of high frequencies in reproduction.
B
attenuation of low frequencies in reproduction.
C
greater aliasing errors in reproduction.
D
no harmful effects in reproduction.
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