A comparison of bandwidth setting concepts for Q-enhanced LC-tanks in deep-sub micron CMOS processes. - Dirk Bormann; Tobias D. Werth; Niklas Zimmermann; Ralf Wunderlich; Stefan Heinen (ICECS, 2008)

An over-voltage protection circuit for CMOS power amplifiers. - Niklas Zimmermann; Ralf Wunderlich; Stefan Heinen (ICECS, 2008)

A wide-frequency-range fractional-N synthesizer for clock generation in 65nm CMOS. - Ye Zhang 003; Niklas Zimmermann; Ralf Wunderlich; Stefan Heinen (ICECS, 2011)