Title :
Experimental procedure to optimize out-of-band terminations for highly linear and power efficient bipolar class-AB RF amplifiers
Author :
Spirito, M. ; van der Heijden, M.P. ; Pelk, M. ; de Vreede, L.C.N. ; Zampardi, P.J. ; Larson, L.E. ; Burghartz, J.N.
Author_Institution :
HiTeC Lab., Delft Univ. of Technol., Netherlands
Abstract :
An optimization procedure based on load-pull measurements to obtain both highly-linear and highly-efficient class-AB operation is presented. This procedure can be applied without any foregoing device characterization; therefore it is an excellent method to compare the linearity performance of different bipolar technologies. The presented approach provides the optimum out-of-band terminations and quiescent current yielding IM3 improvement of more than 15 dBc at 3 dB back-off compared to traditional design techniques. Optimum power-added efficiency is achieved at the same time.
Keywords :
bipolar integrated circuits; power amplifiers; radiofrequency integrated circuits; bipolar class-AB RF amplifiers; bipolar technologies; highly linear RF amplifiers; load-pull measurements; out-of-band terminations; quiescent current; Baseband; Control systems; Impedance; Laboratories; Linearity; Operational amplifiers; Power amplifiers; Power measurement; Radiofrequency amplifiers; Wireless communication;
Conference_Titel :
Bipolar/BiCMOS Circuits and Technology Meeting, 2005. Proceedings of the
Print_ISBN :
0-7803-9309-0
DOI :
10.1109/BIPOL.2005.1555212
