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Faculty Research Interests and
Selected Publications

 

Rolf Schaumann 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.
 
awarded

Jeff Hoffman & Don Tornquist have been chosen for the 2009-2010 ECE Undergraduate Honors Program. The program enables undergraduates to go beyond their normal studies to work with faculty in the area of their choice: research, entrepreneurship or innovation.

Robert Daasch

Dr. Robert Daasch has won the Semiconductor Research Corporation 2009 Technical Excellence Award. It is the second highest research award in the SRC. The Technical Excellence Award was established as an incentive and recognition program for research of exceptional value to GRC members. Authorized by the Board of Directors in December 1991, the award is intended to complement the Inventor Recognition Award. The Technical Excellence Award is shared among key contributors for innovative technology that significantly enhances the productivity/
competitiveness of the semiconductor industry. To date 25 research efforts have received the award. The 2008 Technical Excellence Award was presented to a team of researchers from Portland State University led by Professor W. Robert Daasch, and supported by students Liwei Ning (PhD 2009), and Amit Nahar (MS 2006) for their research, "Burn-in Reduction: Improving Outlier Screening".