Design of the Dynamic Supply CMOS RF Power Amplifie - Linear CMOS RF Power Amplifiers for Wireless Applications - page 37

Table 3.3 Two-tone
simulation results at 5.2 GHz
and − 35 dBc IMD3

2 Tone Constant Dynamic

Output power (dBm) 15 15 . 6

PAE (%) 10 12

Gain (dB) 5 4 . 65

3.5 Conclusion

This chapter presented the design of a dynamic supply CMOS RF power amplifier
for the 5.2 GHz frequency band. The design of the high-efficiency modulator—
including the fully-differential comparator, the synchronous switch, and LC filter—
and the RF power amplifier was described.
In the modulator, the main design issues are associated to the total delay of the
envelope path, whereas in the PA the issues are associated to stability and impedance
matching. In the next chapter, the experimental characterization of the amplifier will
be presented.

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