New stability criteria for the design of low-pass sigma-delta modulators. - Jürgen A. E. P. van Engelen; Rudy J. van de Plassche (ISLPED, 1997)

Stability and design of continuous-time bandpass sigma delta modulators. - Jürgen A. E. P. van Engelen; Rudy J. van de Plassche (ISCAS (2), 1999)

A sixth-order continuous-time bandpass sigma-delta modulator for digital radio IF. - Jürgen A. E. P. van Engelen; Rudy J. van de Plassche; Eduard Stikvoort; Ardie G. Venes (IEEE J. Solid State Circuits, 1999)