A 1-MHz-bandwidth second-order continuous-time quadrature bandpass sigma-delta modulator for low-IF radio receivers. - Frank Henkel; Ulrich Langmann; André Hanke; Stefan Heinen; Elmar Wagner (IEEE J. Solid State Circuits, 2002)

A fully differential CMOS integrated 4th order reconfigurable GM-C lowpass filter for mobile communication. - Uwe Stehr; Frank Henkel; Lutz Dallüge; Peter Waldow (ICECS, 2003)

Excess loop delay effects in continuous-time quadrature bandpass sigma-delta modulators. - Frank Henkel; Ulrich Langmann (ISCAS (1), 2003)

UMTS/GSM multi mode receiver design. - Horst Fischer; Frank Henkel; Michael Engels; Peter Waldow (ISCAS (4), 2004)

Comparison of modeling approaches through hierarchical behavioral modeling of a GNSS receiver front-end. - Zhimiao Chen; Yifan Wang 001; Joern Driesen; Fabio Garzia; Stefan Koehler; Frank Henkel; Ralf Wunderlich; Stefan Heinen (CICC, 2013)