In a superhetrodyne receiver, the difference frequency is chosen as the IF rather than the sum frequency because _________________?
Correct answer: B. Lower frequencies are easier to amplify
- A. The difference frequency is closer to oscillator frequency
- B. Lower frequencies are easier to amplify
- C. Only the difference frequency can be modulated
- D. None of the above
Explanation
The difference frequency is selected as the intermediate frequency because it is lower and can be amplified and filtered conveniently with fixed tuned circuits. The sum frequency is higher and is less practical for this purpose.
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