A modulating signal 2 sin 6 . 28 × 10 6 t is added to the carrier signal 4 sin 12 . 56 × 10 9 t for amplitude modulation. The combined signal is passed through a non-linear square law device. The output is then passed through a band pass filter. The bandwidth of the output signal of band pass filter will be _____ MHz .

Step-by-step solution

Frequencies present in output of square law device 2 f c ,     f c + f m ,     f c ,     f c - f m ,     2 f m ,     f m After passing through band pass filter, frequencies present f c + f m ,     f c ,     f c - f m Bandwidth of the output signal = 2 f m = 2 ω m 2 π = 6 . 28 × 10 6 3 . 14 = 2   MHz