Why is it required in radio receiver to tune the LC circuit to the the resonant frequency of the station in order to receive the station ? How this tuning filters the desired signal from the other signals. Can anyone explain this to me please ?
Electrical – LC circuit in radio receiver
communicationfilterradio
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Best Answer
The L-C filter used to tune to particular radio stations has high Q. Put another way, it passes only a narrow notch of frequencies. When the notch-pass filter is tuned to a particular frequency, it will pass that frequency but heavily attenuate others. Radio stations are spaced far enough apart in frequency so that the signals for other than the desired station are attenuated to below the "don't care" level.