1
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 30 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.
2
GATE ECE 1994
Subjective
+5
-0
A signal, f(t) = $${e^{ - at}}$$ u(t), where u(t) is the unit step function, is applied to the input of a low-pass filter having $$\left| {H(\omega )} \right| = {b \over {\sqrt {{\omega ^2} + {b^2}} }}$$.

Calculate the value of the ratio, $${a \over b}$$, for which 50% of the input signal energy is transferred to the output.

3
GATE ECE 1994
MCQ (Single Correct Answer)
+1
-0.3
The Fourier Series of an odd periodic function, contains only
A
odd harmonics
B
even harmonics
C
cosine terms
D
sine terms
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