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

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

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Radio Receivers
If a FET is used as the first AF amplifier in a transistor receiver, this will have the effect of

Reducing the effect of noise at low modulation depths
Improving the selectivity of the receiver
Improving the effectiveness of the AGC
Reducing the effect of negative-peak clipping

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