Suppose a receiver has the following gain structure (all stages operating at maximum gain):
(a) What is the total power gain of the receiver from antenna to speaker?
(b) What would be the minimum signal required at the antenna in order to get a power of 0.5 W into the speaker? Express your answer in both watts and microvolts, assuming a 50-? input impedance.
(c) Now suppose a 100 mV signal is applied to the antenna. Calculate the output power. Is this a reasonable answer? Explain. What would actually happen in a real receiver?