Design of two stage high efficiency power amplifier in 0.13um technology for 2.4 GHz ISM band applicationsPatankar, Udayan Sunil; Koel, Ants; Rang, ToomasJournal of Advanced Research in Dynamical and Control Systems2018 / p. 822–829http://www.jardcs.org/backissues/abstract.php?archiveid=3585