Andreas  G. Andreou

____________________________

Professor

Electrical and Computer Engineering

Computer Science

Whitaker Biomedical Engineering Institute and

Center for Language and Speech Processing

Barton Hall 400B

Johns Hopkins University

3400 N. Charles Street

Baltimore MD 21218 USA

Phone: +1 410 516 8361

Fax: +1 410 516 5566

Laboratory

Phone: +1 410 516 0258

Skype: andreoulab.barton400

Email:

My research program examines  the  relationship between information, and its physical representation  in both biological and in  engineered information processing systems. We study new ways of transforming and communicating information that exploit physical properties of the underlying technologies; from integrated circuit design principles that rely on the non-linear characteristics of CMOS devices, to high speed serial wireless communication between chips and silicon on sapphire CMOS circuits, to micromechanical structures for acoustic processing and 3D CMOS technology. We also explore unique and innovative methods to acquire data and extract information making use of  a-priori known physical properties of the problem; from engineering single chip integrated polarization imagers to compensating for speaker variability and statistical signal processing in speech recognition through vocal tract normalization. At a more fundamental level, we employ elements of communication and information theory, to analyze,  establish  quantitative and relevant measures for performance and engineer closed loop sensor/motor systems, at different scales, macro to micro and nano.

Selected Papers

 · D.H. Goldberg, and A.G. Andreou, “Distortion of neural signals by spike coding,” Neural Computation, Vol. 19 , No. 10, pp. 2797-2839, October 2007 (pdf).

· J.M. Blain Christen and A.G. Andreou, “Design, fabrication and testing of a hybrid CMOS/PDMS microsystem for cell culture and incubation,” IEEE Transactions on Biomedical Circuits and Systems, Vol.1, No. 1, pp. 2-14, April 2007 (Invited Paper) (pdf).

· Z. Zhang, P.O. Pouliquen, A. Waxman and A.G. Andreou, “Acoustic micro-Doppler radar for human gait imaging,” Journal of the Acoustical Society of America Express Letters, Vol. 121, No. 3, pp. 110-113, March 2007 (pdf).

· E. Culurciello and A.G. Andreou, “Capacitive inter-chip data and power transfer for 3D VLSI,” IEEE Transactions on Circuits and Systems: Part II: Express Briefs, Vol. 53, No. 12, pp. 1348-1352, December 2006.

· D.H. Goldberg, A.G. Andreou, P. Julian, P.O. Pouliquen, L. Riddle and R. Rosasco, “Algorithm and VLSI implementation of a wake-up subsystem for an acoustic surveillance sensor network,” ACM Transactions on Sensor Networks, Vol. 2, No. 4, pp. 594-611, November 2006.

· P.S. Mandolesi, P. Julian and A.G. Andreou, “A scalable and programmable simplicial CNN digital pixel processor architecture”, IEEE Transactions on Circuits and Systems: Part I: Regular Papers, Vol. 51, No. 5, pp. 988-996,  May 2004.

· P. Julian, A.G. Andreou, L. Riddle, S. Shamma, G. Cauwenberghs, “A comparative study of sound localization algorithms for energy aware sensor network nodes, IEEE Transactions on Circuits and Systems: Part I: Regular Papers, Vol. 51, No. 4, pp. 640-648, April 2004.

· D.H. Goldberg, A.P. Sripati and A.G. Andreou, “Energy efficiency in a channel model for the spiking axon,” Neurocomputing, Vol. 52-54, pp. 39-44, June 2003.

· J.J Liu, Z. Kalayjian, B. Riely, W. Chang, G.J. Simonis, A.B. Apsel and A.G. Andreou, “Multichannel ultra-thin silicon-on-sapphire optical interconnects," IEEE Journal of Selected Topics in Quantum Electronics,  Vol. 9, No. 2, pp. 380-386, March/April 2003.

· A.G. Andreou and Z.K. Kalayjian, “Polarization imaging: principles and integrated polarimeters,” IEEE Sensors Journal, Vol. 2, No. 6, pp. 566-576, December 2002.

· A.G. Andreou, Z.K. Kalayjian, A. Apsel, P.O. Pouliquen, R.A. Athale, G. Simonis and R. Reedy, “Silicon on sapphire CMOS for optoelectronic microsystems,” IEEE Circuits and Systems Magazine, Vol. 1, No. 3, pp. 22-30, 3rd Quarter 2001.

· P.A. Abshire and A.G. Andreou, “Capacity and energy cost of information in biological and silicon photoreceptors,” Proceedings IEEE, Vol. 89, No. 7, pp. 1052-1064, July 2001 (Invited Paper).

· T. Serrano-Gotarredona, B. Linares-Barranco, and A.G. Andreou, “A general translinear principle for subthreshold MOS transistors,” IEEE Transactions on Circuits and Systems, Part I: Fundamental Theory and Applications, Vol. 46, No. 5, pp. 607-616, May 1999 (Best Paper Award).
 
· N. Kumar and A.G. Andreou, “Heteroscedastic discriminant analysis and reduced rank HMMs for improved speech recognition,” Speech Communication, Vol. 26, pp. 283-297, 1998.
 
· P.O. Pouliquen, A.G. Andreou and K. Strohbehn, “Winner-Takes-All associative memory: A Hamming distance vector quantizer,” Journal of Analog Integrated Circuits and Signal Processing, Vol. 13, pp. 211-222, March/April 1997.
 
· A.G. Andreou and K.A. Boahen, “Translinear circuits in subthreshold CMOS,” Journal of Analog Integrated Circuits and Signal Processing, Vol. 9, pp. 141-166, March 1996.
 
 · A.G. Andreou, R.C. Meitzler, K. Strohbehn and K.A. Boahen, “Analog VLSI neuromorphic image acquisition and pre-processing systems,” Neural Networks, Vol. 8, No. 7-8, pp. 1323-1347, 1995.
 
· P. Furth and A.G. Andreou, “A design framework for low power analog filter banks,” IEEE Transactions on Circuits and Systems, Part I: Fundamental Theory and Applications, Vol. 42, No. 11, pp. 966-971, November 1995.
 
· L.B. Wolff and A.G. Andreou, “Polarization camera sensors,” Image and Vision Computing, Vol. 13, No. 6, pp. 497-510, August 1995.

· J. Cohen, T. Kamm and A.G. Andreou, " Vocal tract normalization in speech recognition: compensating for systematic speaker variability," 129th Meeting of the Acoustical Society of America, Abstract in J. Acoust. Soc. Am., Vol. 97, page 3246-3247, No.5, Pt. 2, May 1995.

· A.G. Andreou, “On physical models of neural computation and their analog VLSI implementation,” Proceedings of the 1994 Workshop on Physics and Computation, IEEE Computer Society Press, pp. 255-264, Los-Alamitos, CA, 1994.

 

Current Projects

· Natural and synthetic sensor/effector networks

· Information capacity and bit-energy of computing and communication microsystems.

· 3D and SOI-CMOS devices and circuits

· Micropower CMOS information extracting data converters

·  CMOS cameras and readout electronics for life science imaging.

Books

· Teresa Serrano-Gotarredona, Bernabe Linares-Barranco and Andreas G. Andreou, Adaptive Resonance Theory Microchips, Kluwer Academic Publishers, 1998, ISBN 0-7923-8231-5.

· Edgar Sanchez-Sinencio and Andreas G. Andreou, editors, Low-Voltage/Low-Power Integrated Circuits and Systems, IEEE Press, 1998, ISBN 0-7803-3446-9 (Japanese translation, 2000).
 

Current Courses

·  Sensory Information Processing

·  Microfabrication Laboratory

·  Introduction to MEMS

Brief Biography

Curriculum Vitae

Media Coverage

Johns Hopkins Magazine (1990): A Chip You Can Talk To, by Rachel Novak (local pdf)

EE Times (2000): Chips Mimic Net-Centric Model of Human Brain, by Chappell Brown (local pdf)

JHU News (2001): Mini-Lasers and Silicon on Sapphire Technology Lead to Speedier and Cost-Effective Interconnects Between Computer Chips, by Phil Sneiderman (local pdf)

IDG.net (2002): Scientists Use Optics to Speed Data Transfer on Chips, by Sam Costello (local pdf)

e4 (2002): Silicon on Sapphire Technology Leads to Speedier Chips (local pdf)

Patents

United States Patent, 5,206,541  “Current-mode based analog circuits for synthetic neural systems,” April 27, 1993 (local tif)

United States Patent, 6,583,445  “Integrated optoelectronic devices and methods of making them,” June 24, 2003 (local tif)

United States Patent, 6,720,830 "Low-power differential receiver optical receiver in silicon on insulator" , April 13, 2004 (local tif)

Talks

Microsystems Engineering in the Life Sciences: from Nano to Micro and Macro (powerpoint slide show)

Andreou lab page

 credits

 personal page

 Last update: Friday, January 11, 2008