Maurits Ortmanns received the Dipl.-Ing. (M.Sc.) degree in electrical engineering with highest honours from the Saarland University, Saarbruecken, Germany, in 1999. In 1997 and 1998, he was with the Research Center Karlsruhe, Germany, and with EXAR, Inc., Fremont, Ca, as a student research assistant. In 1999, Mr. Ortmanns joined the Institute of Microelectronics of the Saarland University, where he started to work towards the Ph.D. degree in the field of continuous-time sigma-delta modulator design. In 2002, he moved to the Institute of Microsystem Technology, Albert-Ludwigs-University, Freiburg, Germany. Since April 2004, Mr. Ortmanns is with SCI-Worx GmbH, Hannover, Germany, where he is working in the field of RF analog circuits. His main research interests include microelectronics, microsensors and biosensors. Mr. Ortmanns is member of the German National Academic Foundation.

• Basic Understanding of ?? A/D Conversion.- Continuous-Time ?? Modulators.- DAC Nonidealities in Continuous-Time ?? Modulators.- Filter Nonidealities in Continuous-Time ?? Modulators.- Quantizer Nonidealities in Continuous-Time ?? Modulators.- CT ?? Modulator Design Examples.