RF amplifier perform the following functions(choose one or multiple applicable)Group of answer choicesto achieve good selectivityproduce local frequency in order to tune receiverprotect against image frequencyto achieve good sensitivitymix both signals the incoming and the local oscillaotor signals.demodulate the signal
Question
RF amplifier perform the following functions(choose one or multiple applicable)Group of answer choicesto achieve good selectivityproduce local frequency in order to tune receiverprotect against image frequencyto achieve good sensitivitymix both signals the incoming and the local oscillaotor signals.demodulate the signal
Solution
The RF (Radio Frequency) amplifier in a radio receiver performs several functions. Here are the applicable ones from your list:
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To achieve good sensitivity: The RF amplifier increases the strength of weak signals received by the antenna, allowing the receiver to process them.
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Protect against image frequency: The RF amplifier can help to reject image frequencies, which are unwanted signals that can interfere with the desired signal.
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Mix both signals, the incoming and the local oscillator signals: This is not typically a function of the RF amplifier itself, but of the mixer stage in a superheterodyne receiver. However, the amplified signal from the RF amplifier is sent to the mixer.
The RF amplifier does not typically produce local frequency to tune the receiver, achieve good selectivity, or demodulate the signal. These are functions of other stages in the receiver.
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