A 65 nm CMOS 30 dBm Class-E RF Power Amplifier With 60% PAE and 40% PAE at 16 dB Back-Off. - Melina Apostolidou; Mark P. van der Heijden; Domine M. W. Leenaerts; Jan Sonsky; Anco Heringa; Iouri Volokhine (IEEE J. Solid State Circuits, 2009)