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Faculty Research Interests and
Selected Publications

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Rolf Schaumann Professor Emeritus
IEEE Fellow


Phone: 503.725.9041
Fax: 503.725.3807
Email: r.schaumann@ieee.org
Office: FAB 20-06
Web site: Schaumann.html


Education
Ph.D. 1970, Electrical Engineering, University of Minnesota
Dipl.Ing., 1967, Electrical Engineering, University of Stuttgart

Research Interests
My research interests are in the areas of analog integrated circuits, filters, modeling, and statistical circuit design. In particular, my graduate students and I are working on the realization of fully integrated analog filters in CMOS technology for applications at very high frequencies. The work involves the development of fast, electronically tunable building blocks (transconductors and integrators). The circuits should be adaptive and self-tuned against fabrication tolerances, aging, and changing operating conditions, such as temperature. A related issue is the design of high-Q inductors on an IC chip. The development of design-automation systems for the automatic synthesis and layout of filters, starting from high-level functional descriptions, is a further area of interest. Our work has resulted in some 150 publications and several books and book chapters.

Selected Publications
S. Koziel, S. Szczepanski, R. Schaumann, "Structure Generation and Performance Comparison of Elliptic GmC Filters," International Journal of Circuit Theory and Applications, 2004.

H. Xiao, R. Schaumann, W. R. Daasch, P. K. Wong, B. Pejcinovic, "Radio-Frequency CMOS Active Inductor and its Applications in Designing High-Q Filters," Proc. of the IEEE Int. Symp. on Circuits and Systems (ISCAS), Vol. 4, 197-200, 2004.

S. Koziel, R. Schaumann, H. Xiao, "Analysis and Optimization of Noise in Continuous Time OTAC Filters," accepted by International Journal of Circuit Theory and Applications, 2004.

S. Koziel, R. Schaumann, "Continuous Time ActiveRC Filter Model for Computer Aided Design and Optimization," accepted by IEEE Transactions on Circuits and Systems, 2004.

S. Koziel, S. Szczepanski, R. Schaumann, "A General Approach to Continuous-Time GmC Filters," International Journal of Circuit Theory and Applications, Vol. 31, 361-383, 2003.

S. Koziel, S. Szczepanski, R. Schaumann, "CMOS Differential Transconductor with Active Error Feedback," Proc. IECES-2003, 168-171, 2003.