December 2014
Intermediate to advanced
688 pages
18h 19m
English
Content preview from RF Power Amplifier, 2nd Edition
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2.6 Energy Parameters of Class A RF Power Amplifier
2.6.1 Drain Efficiency of Class A RF Power Amplifier
The operating point (the bias point) 
of the Class A RF power amplifier should be selected at the midpoint of the linear region of the transistor, where
2.98 
and
2.99 
The dc supply current of the Class A RF power amplifier is
2.100 
The dc resistance seen by the power supply 
is
2.101 
The dc supply power (or the dc input power) in the Class A RF power amplifier is given by
2.102 
The dc supply power is constant and independent of the amplitude of the output voltage 
. The power delivered by the MOSFET to the output RF load at is given by
2.103
For , the drain power reaches its maximum ...
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