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Electronic Communication Systems 2nd Edition by Roy Blake
النسخة 2الرقم المعياري الدولي: 978-0766826847Electronic Communication Systems 2nd Edition by Roy Blake
النسخة 2الرقم المعياري الدولي: 978-0766826847 تمرين 4
An AM transmitter uses high-level modulation. The RF power amplifier draws 10 amperes from a 20 volt supply, putting out a carrier power of 125 watts.
(a) What is the efficiency of this stage
(b) What load impedance is required by this amplifier in order for it to deliver rated power
(c) How much power must be provided by the modulating amplifier for 90% modulation
(d) What impedance would be seen at the modulation transformer secondary
(a) What is the efficiency of this stage
(b) What load impedance is required by this amplifier in order for it to deliver rated power
(c) How much power must be provided by the modulating amplifier for 90% modulation
(d) What impedance would be seen at the modulation transformer secondary
التوضيح
موثّق
موثّق
(a)
Write the expression for the power
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Electronic Communication Systems 2nd Edition by Roy Blake
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