The circuit comprises an amplifier and a parallel resonant circuit. The input signal with a wide
range of frequencies is accepted and amplified by the amplifier. The resonant circuit allows
(passes on) only a selected band of frequencies at the output. The variable capacitor allows the
tuning of the circuit for the desired frequency.
4.6.2 Input to Receiver from an Antenna
Radio signals in the form of electromagnetic waves are propagated through the atmosphere.
An antenna is used to receive the radio signals. A small voltage is induced in the antenna
when the electromagnetic waves cut across the antenna. The ar ...
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