# Receivers

### Explanation of question 5

Fig. 22.2 is a block diagram of a superheterodyne receiver. X and Y represent respectively the

1. RF amplifier and detector
2. detector and RF amplifier
3. AF amplifier and detector
4. RF amplifier and IF amplifier

The answer is :- 4 The stage before,the mixer is the r.f. amplifier. The output from the mixer is then fed to the i.f. amplifier

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