Home Page of Philipp Häfliger
Curriculum Vitae
I am working at
the University of Oslo, department of informatics (computer science), in the microelectronic systems group
and at
the Vestfold University College, Institute for Microsystems Technology
Active Research Topics
National and International Projects
Teaching
Past, ongoing and open student projects are summarized under this link.
PhD Thesis
A Spike Based Learning Rule and its Implementation in Analog Hardware (Full version,
ps gzipped, pdf)
Scientific Publications
PhD Thesis
- A spike based learning rule and its implementation in analog
hardware, PhD thesis, ETH Zürich, Switzerland, 2000, pdf
Book Chapters
- Spike based normalizing Hebbian learning in an analog VLSI artificial neuron in 'Learning in Silicon', editor: Gert Cauwenberghs, Kluwer Academics, 1999 abstract, pdf
- Weight vector normalization in an analog VLSI artificial neuron using a backpropagating action potential in Neuromorphic Systems, Engineering Silicon from Neurobiology, editors L. S. Smith and A. Hamilton, 1998 abstract, pdf, ps
Journal Articles
- Exploiting Gate Leakage in Sub-Micron CMOS for Input Offset Adaptation (With H. K. O. Berge, accepted for publication in IEEE Transactions on Circuits and Systems II) .
- Adaptive WTA with an analog VLSI neuromorphic learning chip, accepted for publication in IEEE Transactions on Neural Networks) .
- An Asynchronous 4-to-4 AER Mapper (With H. Kolle Riis, Lecture Notes in Computer Science 3512, 2005) abstract, pdf.
- A rank encoder: Adaptive analog to digital conversion exploiting time domain spike signal processing (With E. Jørgensen Aasebø, Kluwer journal 'Analog Integrated Circuits and Signal Processing', volume 40, no. 1, p. 39-52, 2004), pdf
- Spike based normalizing Hebbian learning in an analog VLSI artificial neuron in 'Analog Integrated Circuits and Signal Processing 18: Special issue on Learning in Silicon', Kluwer Academics, 1999 abstract, pdf
Peer Reviewed Conference Papers
- AER Building Blocks for Multi-Layer Multi-Chip Neuromorphic Vision Systems (With R. Serrano-Gotarredona, M. Oster, P. Lichtsteiner, A. Linares-Barranco, R. Paz-Vicente, F. Gómez-Rodríguez, H. Kolle Riis, T. Delbrück, S. C. Liu, S. Zahnd, A. M. Whatley, R. Douglas, P. Häfliger, G. Jimenez-Moreno, A. Civit, T. Serrano-Gotarredona, A. Acosta-Jiménez, B. Linares-Barranco, Advances in Neural Information Processing Systems (NIPS), 2005) abstract, pdf.
- A Foveated AER Imager Chip (With M. Azadmehr and J. P. Abrahamsen, Conference paper at ISCAS 2005 in Kobe) abstract, pdf.
- A Time Domain Winner-Take-All network of Integrate-and-Fire Neurons (With J. P. Abrahamsen and T. S. Lande, Conference paper ISCAS 2004 in Vancouver) abstract, pdf
- Spike Based Learning with Weak Multi-Level Static Memory (With H. Kolle Riis, Conference paper ISCAS 2004 in Vancouver) abstract, pdf
- A Multi-Level Static Memory Cell (With H. Kolle Riis, Conference paper ISCAS 2003 in Bangkok) abstract, pdf
- An integrated circuit computing shift in stereo pictures using time domain spike signals (With F. Bergh, Conference paper NORCHIP 2002 in Københaven) abstract, pdf
- Asynchronous event redirecting in bio-inspired communication (Conference paper ICECS 2001 in Malta) abstract, pdf
- Learning a temporal code (Conference paper ESANN 99 in Brügge) abstract, pdf, ps
- Floating gate analog memory for parameter and variable storage in a learning silicon neuron (Conference paper ISCAS'99) abstract, pdf, ps
- A spike based learning neuron in analog VLSI (Conference Paper NIPS 96) abstract , pdf, ps
- Prompt Radio Emission of Supernovae: Plasma Radiation Alternative? (A. O. Benz and P. D. Haefliger, 95) Radio emissions from the stars and the sun (Editors: J.M. Paredes and A.R. Taylor) Astron. Soc. Pac. Conf., Vol. 93 S. 96
Others
- On using the time domain for analog signal representation in electronic circuits (Newsletter: The Neuromorphic Engineer, Vol. 1, No. 1, 2004)
Learning through search (my master project)
As other people, I have programmed a Backgammon game that learns playing on its own, using my own algorithm that differs from the better known TD(lambda).
You can
download the documentation of the project but be aware that it is written in German.
Playing against my master thesis
Here it was for a while possible to play against my diploma thesis through a java applet ;-) For the moment, though, I stopped updating the server software for the newest opperating system. If someone is really interested, please get in touch with me.
Address
Philipp Häfliger
Insitute of Informatics
University of Oslo
PO Box 1080, Blindern
N-0316 Oslo
Norway
Tel: +47 22 84 01 18
Fax: +47 22 85 24 01
WARNING: Since spam is overflowing in my mailbox nowadays, I apply a quite rigorous mail filter. If you try to approach me for the first time by e-mail, I may never see it. It is best to call or write to me.
Leisure
