Double tuned circuits are used in ___________ stages of a radio receiver

The correct answer is: A. IF

Double tuned circuits are used in the intermediate frequency (IF) stage of a radio receiver. The IF stage is a frequency-selective amplifier that amplifies the signal from the mixer stage to a higher frequency that is easier to filter and amplify. The double tuned circuit provides a high degree of selectivity, which is important for rejecting unwanted signals.

The IF stage is typically followed by an audio amplifier, which amplifies the signal to a level that is suitable for driving a loudspeaker. The output stage is responsible for delivering the amplified signal to the loudspeaker.

Here is a brief explanation of each option:

• Option A: The IF stage is a frequency-selective amplifier that amplifies the signal from the mixer stage to a higher frequency that is easier to filter and amplify. The double tuned circuit provides a high degree of selectivity, which is important for rejecting unwanted signals.
• Option B: The audio amplifier amplifies the signal to a level that is suitable for driving a loudspeaker.
• Option C: The output stage is responsible for delivering the amplified signal to the loudspeaker.
• Option D: None of the above.