GATE EC|| SIGNALS & SYETMS || DTFT, DFT & MISCELLANEOUS || PYQs(2000-2025)

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Question 1

(GATE 2018 || EC || NAT|| 2 MARKS)

Question 2

For a given sample-and-hold circuit, if the value of the hold capacitor is increased, then

(GATE 2014 || EC || MCQ || 1 MARKS)

drop rate decreases and acquisition time decreases
drop rate decreases and acquisition time increases
drop rate increases and acquisition time decreases
drop rate increases and acquisition time increases

Question 3

(GATE 2015 || EC || MCQ || 1 MARK)

Question 4

(GATE 2015 || EC || NAT || 2 MARKS)

Question 5

A continuous time function x(t) is periodic with period T. The function is sampled uniformly with a sapling period T_s. In which one of the following cases is the sampled signal periodic?

(GATE 2016 || EC || MCQ || 1 MARK)

Always
Never

Question 6

A continuous-time sinusoid of frequency 33 Hz is multiplied with a periodic Dirac-impulse train of frequency 46 Hz. The resulting signal is passed through an ideal analog low-pass filter with a cutoff frequency of 23 Hz. The fundamental frequency (in Hz) of the output is _____.

(GATE 2016 || EC || NAT || 1 MARKS)

Question 7