Advantages of an RF amplifier & Costas receiver

Q.  The advantages of using an RF amplifier are
- Published on 14 Oct 15

a. Better sensitivity
b. Improved signal to noise ratio
c. Better selectivity
d. All of the above

ANSWER: All of the above
 
The RF amplifiers are used in super heterodyne receivers. The advantages of using RF receivers are
- They have better sensitivity i.e. they have improved gain to the signal
- They have better signal to noise ration than other amplifiers
- The selectivity is better as they have better rejection to the adjacent undesired signals.

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