Radio Frequency Integrated Circuit Design - Webs

Power Amplifiers
Figure 10.25 Initial simulated class E waveforms.
With this adjustment, the results are now close to the predicted values.
The average current is about 60 mA; collector output voltage is just over 12V,
a little bit more than predicted; the collector current peaks at 180 mA, close
to the predicted value; and the output voltage is about 5.8V peak to peak,
nearly the predicted value. The output power is 162 mW while the dc power
is about 180 mW for a dc-to-RF efficiency of about 90%. However, with the
unrealistic pulse input, a significant amount of power is fed into the input, so
PAE will be lower; in this example, with an input current of nearly 20 mA,
PAE is estimated to be about 75%.
10.8 Class F Amplifiers
In the class F amplifier shown in Figure 10.27, an additional resonator is used,
with the result that an additional harmonic, typically the third harmonic, is
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