Block diagram of a receiver is shown in the figure:
(a) Identify 'X' and 'Y'
(b) Write their functions.

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Solution

From the given block diagram of demodulation of a typical receiver, we can conclude the following things;
(a) X represents Intermediate Frequency (IF) stage while Y represent an Amplifier,
(b)At IF stage, the carrier frequency is transformed to a lower frequency then in this process, the modulated signal is detected. The function to amplifier is to enough to be made use of and hence is essential.

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