Show which of the following statements about the amplitude limiter is untrue:
A. The circuit is always biased in class C, by virtue of the leak-type bias.
B. When the input increases past the threshold of the limiting, the gain decreases to keep the output constant.
C. The output must be tuned
D. Leak-type bias must be used
Answer: Option A
This Question Belongs to Electronics And Communications Engineering >> Radio Receivers
A low ratio of the ac to the dc load impedance of a diode detector results in
A. Diagonal clipping
B. Poor AGC operation
C. Negative-peak clipping
D. Poor AF response
Indicate which of the following circuits could not demodulate SSB:
A. Balance modulator
B. Product modulator
C. BFO
D. Phase discriminator
If the intermediate frequency is very high (indicate false statement)
A. Image frequency rejection is very good
B. The local oscillator need not be extremely stable
C. The selectivity will be poor
D. Tracking will be improved
One of the following cannot be used to demodulate SSB:
A. Product detector
B. Diode Balance modulator
C. Bipolar transistor balanced modulator
D. Complete phase-shift generator
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