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What circuit provides the initial selectivity in a receiver?

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What circuit provides the initial selectivity in a receiver?

(a) Amplifier

(b) Attenuator

(c) Multiplexer

(d) LC tuned circuits

I had been asked this question in an online quiz.

My question is from Communication Receivers topic in portion Radio Transmitters, Communication Receivers, Multiplexing and Demultiplexing of Avionics

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Correct choice is (d) LC tuned circuits

To explain: Initial selectivity in a receiver is normally obtained by using LC tuned circuits. By carefully controlling the Q of the resonant circuit, we can set the desired selectivity.

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