(F)Element 3-42 RF Amplifiers Flashcards
1
Q
How can selectivity be achieved in the front-end circuitry of a communications receiver?
A
a preselector
2
Q
What is the primary purpose of RF amplifier in a receiver?
A
to improve the receivers noise figure
3
Q
How much gain should be used in the RF amplifier stage of a receiver?
A
sufficient gain to allow weak signals to overcome noise generated in the first mixer stage
4
Q
Too much gain in a VHF receiver front end could result in
A
susceptibility of intermodulation interference from nearby transmitters
5
Q
What is the advantage of a GaAsFET amplifier in a modern VHF radio receiver?
A
high gain low noise floor
6
Q
In what stage of a VHF receiver would a low amplifier be most advantageous?
A
front end RF stage
