Radio Receivers
Show which of the following statements about the amplitude limiter is untrue:

The circuit is always biased in class C, by virtue of the leak-type bias.
When the input increases past the threshold of the limiting, the gain decreases to keep the output constant.
The output must be tuned
Leak-type bias must be used

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Radio Receivers
Indicate the false statement in connection with communications receivers.

The noise limiter cuts off the receiver’s output during a noise pulse.
Double conversion is used to improve image rejection
Variable sensitivity is used to eliminate selective fading
A product demodulator could be used for the reception of Morse code.

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Radio Receivers
In a radio receiver with simple AGC

The faster the AGC time constant the more accurate the output
The audio stage gain is normally controlled by the AGC
The highest AGC voltage is produced
An increase in signal strength produces more AGC

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