Prof. Dr.-Ing. Wolfgang Mathis

Leibniz Universität Hannover, Zentrum für Didaktik der Technik (ZDT), Appelstr. 9A, D-30167 Hannover, Germany

E-mail: mathis@tet.uni-hannover.de

Wolfgang Mathis was born in Celle, Germany, on May 13, 1950. He received the Dipl.-Phys. degree in physics (1980) and the Dr.-Ing. degree in electrical engineering (1984), and the Habilitation degree (1988) from the Technical University of Braunschweig where he became assistant professor (1985-1990), then a professor at the Universities of Wuppertal (1990-1996), Magdeburg (1996-2000), Leibniz University of Hanover (2000-2018) and retired since 2018. His research interests include nonlinear deterministic and noisy circuits and dynamical systems, computer-aided circuit analysis and design, nanoelectronics, quantum computing, analysis and numerics of electromagnetic fields, and history of electrical engineering and physics. He published 8 books and more than 400 papers. He is a member of VDE/ITG, DPG, URSI, IEEE. He became a IEEE SM (1998), IEEE Fellow (1999), IEEE Life Fellow (2018). He served as an associate editor of the IEEE Trans. CAS (1995-1997) and was the chair of the IEEE CAS, German chapter (until 2018) and the president of URSI, Germany, (2009-2018). Since 2001 he is member of the NRW Academy of Sciences and since 2008 member of acatech (National Academy of Science and Engineering).

100 Years Multivibrator – History, Circuits and Mathematical Analysis

Abstract: In this presentation the 100 years history of the multivibrator is considered. A first version of this well-known circuit shape was presented by Abraham and Bloch in 1919 using vacuum tubes. This circuit shape is alive until now whereby only the type of electronic devices was changed. Furthermore, the multivibrator circuit with its relaxation behavior was the starting point for extensive mathematical studies.