RF power control in GSM systems for constant and non constant envelope modulation schemes. - Rolf Becker; Willem H. Groeneweg; Ralf Burdenski (ISCAS (3), 2003)

A 1 watt audio amplifier in a standard digital 90-nm CMOS technology. - Rolf Becker; Willem H. Groeneweg (ESSCIRC, 2005)

Baseband and audio mixed-signal front-end IC for GSM/EDGE applications. - Barbara Baggini; Philipp Basedau; Rolf Becker; Peter Bode; Ralf Burdenski; Farzad Esfahani; Willem H. Groeneweg; Markus Helfenstein; Alexander Lampe; Roland Ryter; Ralph Stephan (IEEE J. Solid State Circuits, 2006)

An audio amplifier providing up to 1 Watt in standard digital 90-nm CMOS. - Rolf Becker; Willem H. Groeneweg (IEEE J. Solid State Circuits, 2006)

Analog signal processing for a class D audio amplifier in 65 nm CMOS technology. - Willem H. Groeneweg (ESSCIRC, 2008)

A 650mW Filterless Class-D Audio Power Amplifier for Mobile Applications in 65-nm Technology. - Bernard Pilloud; Willem H. Groeneweg (ISCAS, 2009)

Correction to "Baseband and Audio Mixed-Signal Front-End IC for GSM/EDGE Applications" [Jun 06 1364-1379]. - Barbara Baggini; Philipp Basedau; Rolf Becker; Peter Bode; Farzad Esfahani; Willem H. Groeneweg; Markus Helfenstein; Alexander Lampe; Roland Ryter; Ralph Stephan (IEEE J. Solid State Circuits, 2010)

A Class-AB/D Audio Power Amplifier for Mobile Applications Integrated Into a 2.5G/3G Baseband Processor. - Willem H. Groeneweg; Bernard Pilloud; Filippo Neri; Guido Notermans; Marco Balucani; Markus Helfenstein (IEEE Trans. Circuits Syst. I Regul. Pap., 2010)