A Quad-Band GSM/EDGE-Compliant SiGe-Bipolar Power Amplifier. - Winfried Bakalski; Bernhard Sogl; Markus Zannoth; Michael Asam; Boris Kapfelsperger; Jörg Berkner; Bernd Eisener; Wolfgang Thomann; Siegfried Marcon; Wilfried Osterreicher; Ewa Napieralska; Erwin Rampf; et al. (IEEE J. Solid State Circuits, 2008)