A signal m(t), band-limited to a maximum frequency of 20 kHz is sampled at a frequency fs kHz to generate s(t). An ideal low pass filter having cut-off frequency 37 kHz is used to reconstruct m(t) from s(t). The minimum of fs required to reconstruct m(t) without distortion is
A. 20 kHz
B. 40 kHz
C. 57 kHz
D. 77 kHz
Answer: Option C
This Question Belongs to Electronics And Communications Engineering >> Communication Systems
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