1
GATE ECE 2004
MCQ (Single Correct Answer)
+2
-0.6
A 1 kHz sinusoidal signal is ideally sampled at 1500 samples /sec and the sampled signal is passed through an ideal low-pass filter with cut-off frequency 800 Hz. The output signal has the frequency
A
zero Hz
B
0.75 kHz
C
0.5 kHz
D
0.25 kHz
2
GATE ECE 2003
MCQ (Single Correct Answer)
+2
-0.6
Let x(t) = $$\,2\cos (800\pi t) + \cos (1400\pi t)$$. x(t) is sampled with the rectangular pulse train shown in figure. The only spectral components (in KHz) present in the sampled signal in the frequency range 2.5 kHz to 3.5 kHz are GATE ECE 2003 Signals and Systems - Sampling Question 10 English
A
2.7, 3.4
B
3.3, 3.6
C
2.6, 2.7, 3.3, 3.4
D
2.7, 3.3
3
GATE ECE 2002
MCQ (Single Correct Answer)
+2
-0.6
A signal x(t) = 100 cos $$(24\pi \times {10^3})$$ t is ideally sampled with a sampling period of 50 $$\mu \sec $$ and then passed through an ideal low pass filter with cutoff frequency of 15 KHz. Which of the following frequencies is/ are present at the filter output?
A
12 KHz only
B
8 KHz only
C
12 KHz and 9 KHz
D
12 KHz and 8 KHz
4
GATE ECE 2001
MCQ (Single Correct Answer)
+2
-0.6
The Nyquist sampling interval, for the signal Sinc(700t) + Sinc(500t) is
A
$${1 \over {350}}\,\sec $$
B
$${\pi \over {350}}\,\sec $$
C
$${1 \over {700}}\,\sec $$
D
$$\,{\pi \over {350}}\,\sec $$
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