Tor Fjeldly (visiting
professor from Norwegian University of Science and Technology)
Professor of Electronics
University Graduate Center, Norwegian University of Science
and Technology (NTNU)
Ph.D., Physics, Brown University, 1972
M.S., Physics, Norwegian University of Science and
Fjeldly began his professional career in 1971 as a scientist
at the Max-Planck-Institute for Solid State Physics in Stuttgart,
Germany. After spending three years there, he joined the staff
of ELAB-SINTEF in Trondheim, Norway, as a senior scientist.
In 1983, he became a member of the Norwegian University of
Science and Technology in Trondheim. He was named a full professor
in 1986. Fjeldly was a visiting scientist in the University
of Minnesota's Department of Electrical Engineering Minneapolis
for the summers of 1988 and 1989 and visiting professor at
the University of Virginia's Department of Electrical Engineering
from 1990 through 1996. He has been a visiting professor for
Rensselaer's Electrical, Computer, and Systems Engineering
Department since 1997. He joined the UniK-University Graduate
Center at Kjeller in Norway in 1998 and has also been an adjunct
professor since 2002 at Oslo University in the Department
At NTNU, he has held administrative roles
such as department head of physical electronics from 1986
to 1987 and 1989 to 1993 as well as associate dean of the
faculty of electrical engineering and computer science from
1989 to 1990.
Fjeldly was elected as a member of
the Norwegian Academy of Technical Sciences, and is a Fellow
of the Institute of Electrical and Electronics Engineers (IEEE).
He is also the co-author of two patents and the author and
co-author of about 200 scientific and technical publications,
including 160 in international scientific journals and conference
proceedings. He is also the co-author of three books and ten
chapters and co-editor of four books and two conference proceedings.
Fjeldly is co-editor-in-chief of the International Journal
of High Speed Electronics and Systems and co-editor of
Selected Topics in Electronics and Systems, a book
Fjeldly's research interests include device modeling and circuit
simulation, electronic-photonic circuits, charge transport
phenomena, and microelectromechanical systems (MEMs). He is
also working with an experimental remote Internet lab.
His device modeling and circuit simulation
research emphasizes physics-based device modeling for applications
in circuit simulators, such as the Simulation Program for
Integrated Circuits Emphasis (SPICE). He is using a unified
charge channel approach, with inclusion of important non-ideal
effects related to reduced dimensions and high fields. Most
of today's relevant technologies are covered, including CMOS,
SOI-CMOS, Si thin-film transistors (a-Si TFTs and poly-Si
TFTs), GaAs FETs, and GaN-technology. Almost all of the models
considered have been implemented in AIM-Spice, a circuit simulator
program Fjeldly co-developed.
His electronic-photonic circuits research is of direct relevance
for System-on-Chip technology, with multi-signal/multi-technology
emphasis. The long-term objective is to develop computer-assisted
design (CAD) tools for handling such technologies. Studies
of radiation-effects on circuits relate to cosmic radiation
photoeffects and damage in space electronics, and also concern
solar cell issues.
Fjeldly's charge transport phenomena research involves fundamental
transport phenomena of relevance to both present and future
generations of semiconductor devices, including aggressively
downscaled devices where non-stationary and quantum phenomena
His involvement with MEMs includes some previous work on integrated,
solid-state chemical sensors. He and his researchers have
begun modeling mechanical and other sensors/actuators in terms
of electrical equivalent circuits, for easy integration into
established ASIC CAD tools.
Fjeldly's work also involves the development
of remotely operated laboratory modules that use advanced
Internet and Web technology. He hopes to make such modules
available as part of a remote engineering education strategy
and for use in studio and classroom settings. Systems are
based on TCP/IP and Java Applets, LabVIEW, and ActiveX technology
(ISAPI or COM+ solutions). The site is available at
T. Ytterdal, Y. Cheng, and T.A.
Fjeldly, Device Modeling for Analog and RF CMOS Circuit
Design, John Wiley & Sons, London, New York, (2003).
T.A. Fjeldly, J.O. Strandman, R. Berntzen,
and M.S. Shur, "Advanced Solutions for Performing Laboratory
Experiments over the Internet," in Engineering Education
and Research - 2001, A Chronicle of Worldwide Innovations,
W. Aung, P. Hicks, L. Scavarda, V. Roubicek, and C.-H. Wei,
eds., iNEER in cooperation with Begell House Publishers, 135-146,
T.A. Fjeldly, Y. Deng, M.S. Shur, H.P Hjalmason,
A. Muyshondt, and T. Ytterdal, "Modeling of Transient
High Dose-Rate Ionizing Radiation Effects in Bipolar Devices,"
IEEE Transactions on Nuclear Science, 43,
(5), (Oct. 2001).
J. Deng, M.S. Shur, T.A. Fjeldly, and S.
Baier, "CAD Tools and Optical Device Models for Mixed
Electronic/Photonic VLSI," International Journal of
High Speed Electronic Devices and Systems, 10,
(1), 299-308, (2000).
L. Wang, T.A. Fjeldly, B. Iniguez, H. Slade,
and M.S. Shur, "Self-Heating and Kink Effects in a-Si:H
Thin Film Transistors," IEEE Transactions on Electron
Devices, 47, 387-397,
T. Ytterdal, T.A. Fjeldly, M.S. Shur, S.
Baier, and L. Lucero, "Enhanced Heterostructure Field
Effect Transistor Model Suitable for Simulation of Mixed Mode
Circuits," IEEE Transactions on Electron Devices,
46, 1577-1588, (1999).
T.A. Fjeldly, T. Ytterdal, and M.
Shur, Introduction to Device Modeling and Circuit Simulation,
John Wiley & Sons, New York, (1998).
M. Shur and T.A. Fjeldly, "Compound-Semiconductor
Field-Effect Transistors," in Modern Semiconductor
Device Physics, S.M. Sze, Editor, John Wiley & Sons,
New York, (1998).
B. Iñiguéz and T.A. Fjeldly,
"Unified Substrate Current Model for MOSFETs," Solid-State
Electronics, 41, (1),
Y. Cheng and T.A. Fjeldly, "Unified
Physical I-V Model Including Self-Heating Effect for Fully
Depleted SOI/MOSFETs", IEEE Transactions on Electron
Devices, 43, 1291-1296,
T.A. Fjeldly and M. S. Shur, "Threshold
Voltage Modeling and the Subthreshhold Regime of Operation
of Short-Channel MOSFETs," IEEE Transactions on Electron
Devices, 40, 137-145,
UniK - Norwegian University of Science and Technology
N-2027 Kjeller, Norway
Back to Top