GATE EC 2020 Question 52 | AM Signal Demodulation with Local Oscillator Frequency Offset

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EC > GATE 2020 > Modulation and Demodulation

For the modulated signal x(t)=m(t)cos(2πfct), the message signal m(t)=4cos(1000πt) and the carrier frequency fc is 1 MHz. The signal x(t) is passed through a demodulator, as shown in the figure below. The output y(t) of the demodulator is

A

cos(460πt).

B

cos(920πt).

C

cos(1000πt).

D

cos(540πt).

Correct : b

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