Electronics and Communication Engineering - Radio Receivers

Exercise :: Radio Receivers - Section 1

16. 

In a receiver, which of the following device has IF input but RF output?

A. Demodulator
B. Loudspeaker
C. Audio amplifier
D. Frequency changer

Answer: Option A

Explanation:

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17. 

Transistor are free from which type of noise?

A. Resistance noise
B. Partition noise
C. Flicker noise
D. Shot noise

Answer: Option B

Explanation:

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18. 

Standard AM radio broadcasts are confined to

A. MF
B. HF
C. VHF
D. UHF

Answer: Option A

Explanation:

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19. 

In a radio receiver with simple AGC

A. the highest AGC voltage is produced between stations
B. the faster the AGC time constant, the more accurate the output
C. an increase in signal strength produces more AGC
D. the audio stage gain is normally controlled by AGC

Answer: Option C

Explanation:

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20. 

Which of the following cannot be used to demodulate SSB?

A. Complete phase-shift generator
B. Product detector
C. Diode balanced modulator
D. Bipolar transistor balanced modulator

Answer: Option D

Explanation:

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