Radio Receivers
In a radio receiver with simple AGC

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

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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
In a ratio detector

the output is twice that obtainable from a similar phase discriminator
stabilization against signal strength variations is provided
the circuit is the same as in a discriminator, except that the diodes are reversed
the linearity is worse than in phase discriminator

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