1
GATE ECE 1999
MCQ (Single Correct Answer)
+2
-0.6
The Nyquist sampling frequency (in Hz) of a signal given by $$16 \times {10^{4\,}}\,\sin {c^2}(400t)*{10^6}\,\sin {c^3}(100t)$$ is
A
200
B
300
C
500
D
1000
2
GATE ECE 1991
Fill in the Blanks
+2
-0
A signal has frequency components from 300 Hz to 1.8 KHz. The minimum possible rate at which the signal has to be sampled is ______ (fill in the blank).
3
GATE ECE 1990
MCQ (Single Correct Answer)
+2
-0.6
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 sampled. The minimum frequency of the sampling impulse train should be:
A
4 MHz
B
8 MHz
C
8 GHz
D
8.004 GHz
4
GATE ECE 1988
MCQ (Single Correct Answer)
+2
-0.6
A signal containing only two frequency components (3 kHz and 6 kHz) is sampled at the rate of 8 kHz, and then passed through a low pass filter with a cutoff frequency of 8 kHz. The filter output
A
is an undistorted version of the original signal.
B
contains only the 3 kHz component.
C
contains the 3 kHz component and a spurious component of 2 kHz.
D
contains both the components of the original signal and two spurious components of 2 kHz and 5 kHz.
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