Welcome to CAEL (ComputerAided Engineering Research LAB)
Professors: Michel
Nakhla and Ram Achar
5170 ME, Department of
Electronics, Carleton University
Ottawa, Ontario, Canada  K1S 5B6
Ph:
6135205780/5651/1883; Fax: 6135205708
Email: achar@doe.carleton.ca
For more informative contact links, please
click here
Faculty:
Dr. Michel Nakhla
5170 ME, Department of
Electronics, Carleton University
Ottawa, Ontario, Canada  K1S 5B6
Ph:
6135205780; Fax: 6135205708
msn@doe.carleton.ca
Dr. Ram Achar
5170 ME, Department of
Electronics, Carleton University
Ottawa, Ontario, Canada  K1S 5B6
Ph:
6135205651; Fax: 6135205708
achar@doe.carleton.ca
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Research Overview:
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ComputerAided
Design Tools and Methodologies for Analysis of HighSpeed VLSI Systems
The future trend towards higher operating speeds,
sharper excitations and more complex designs demands essential changes in the
VLSI (Very Large Scale Integration) design/verification methodologies and the
associated computeraided design (CAD) tools. With the increasing signalspeed
and decreasing feature sizes, highfrequency effects such as delay, attenuation,
reflection, and crosstalk become the dominant factors limiting overall
performance of microelectronic systems.
Highspeed modules can be diverse, and can exist at any of the hierarchical
levels of VLSI systems, including integrated circuits, printed circuit boards,
multichip modules and backplanes. It is imperative to note that, due to higher
frequencies, the traditional and artificial boundaries between different design
disciplines such as electrical, thermal and mechanical, etc. are fast vanishing.
Conventional CAD tools do not handle adequately the new emerging challenges of
highspeed circuits, interconnects and mixeddomain problems. However, if not
considered during the early design stages, highspeed effects can result in
system failure, leading to extra iterations in the design cycle and steeply
increased cost. To
cope with these new requirements of managing the complexity of highspeed
modules, coordinated research activities spanning various design domains are
proposed with the goal of developing new generation CAD algorithms and tools to
facilitate easy, efficient and accurate modeling/analysis/optimization process.
The new initiatives are built on the success and the current knowledge of the
ComputerAided Engineering Research Lab (CAEL) in the area of highspeed circuits and
interconnects. The research objectives are focused on generic strategic issues
that are common to all highspeed applications. In addition, the proposed
multidisciplinary tools and methodologies are targeted towards wide range of
physical implementation levels. Research activities cover a broad spectrum of
issues, including
Signal
Integrity,
Modeling and
Simulation of HighSpeed
Interconnects,
ModelReduction Techniques
Design
Tools for RF and Wireless Applications,
Design
Tools for MEMS and Optoelectronic Applications,
EMI and Immunity, and
MixedDomain Simulation
The proposed
methodologies and algorithms will be suitable for iterative interactive design
techniques requiring repetitive analysis of large highspeed systems and are
expected to lead to shorter design cycles, reduced timetomarket and better
quality highspeed electronic systems.
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Recent Publications:
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Multimedia Books:
Publishers:
OMNIZ
Global Knowledge Corporation
in Partnership with
IEEE (Education Partners) and
Amazon.com
Authors:
M. Nakhla
and R. Achar, First
Edition: May 01, 2002
1.
Introduction to
HighSpeed Circuit and Interconnect Analysis
((ISBN
0973104708)
2. Principles of Circuit and
Interconnect Simulation
((ISBN
0973104716)
3. Fundamentals of Multiconductor
Transmission Line Analysis
((ISBN
0973104724)
4. ModelReduction Algorithms:
Principles, AWE, CFH and Macromodeling
((ISBN
0973104732)
5. Theory of Eigenvalue Analysis
and Orthogonal Systems
((ISBN
0973104740)
6. Krylov Subspace Techniques for
Circuit and Interconnect Analysis
((ISBN
0973104759)

Eli Chiprout and
Michel Nakhla, Asymptotic Waveform Evaluation and Moment Matching for
Interconnect Analysis , Boston, MA : Kluwer Academic Publisher , 1994.

Michel Nakhla and Qijun Zhang (Editors),
Modelling and Simulation of highSpeed VLSI Interconnects, Boston, MA :
Kluwer Academic Publisher , 1994.
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Chapters in Books (Recent)
[1]
R. Achar and M. Nakhla, Minimum
Realization of ReducedOrder Models of HighSpeed Interconnect Macromodels,
Chapter III: Signal Propagation on Interconnects, pp. 2345, Boston:
Kluwer Academic Publishers, 1998.
[2]
M. Nakhla and R. Achar, Interconnect
Modelling and Simulation, Chapter XVII: The VLSI Handbook, pp. 17.1 
17.29, Boca Raton: CRC Press, 2000.
[3]
M. Nakhla, R.
Achar and R. Khazaka, Modeling and Simulation of HighSpeed VLSI
Interconnects, Chapter IV: Circuits And Systems In The Information Age,
pp. 187  216, NJ: IEEE Publishers, 1997.
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Refereed Journal Papers (Recent)
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 A. Dounavis, R. Achar and M.
Nakhla "Efficient Sensitivity Analysis of Lossy Multiconductor Transmission
Lines with Nonlinear Terminations," IEEE Transactions on Microwave Theory and
Techniques, accepted Dec 2001.
 I. Erdin, A. Dounavis, R.
Achar and M. Nakhla, "A SPICE Model for Incident Field Coupling to Lossy
Multiconductor Transmission Lines," IEEE Transactions on Electromagnetic
Compatibility, accepted Nov. 2001.
 A. Dounavis, R. Achar and M.
Nakhla "A General Class of Passive Macromodels for Lossy Multiconductor
Transmission Lines," IEEE Transactions on Microwave Theory and Techniques,
accepted Oct 2001.
 P. K. Gunupudi and M. Nakhla,
"Nonlinear CircuitReduction of HighSpeed Interconnect Networks Using
Conguent Transformation Techniques," IEEE Transactions on Advanced Packaging,
vol.24, No 3,pp. 317325, Aug. 2001.
 M. Nakhla and R. Achar,
"Simulation of HighSpeed Interconnects", pp. 693728, Vol. 89, No. 5,
Proceedings of The IEEE, May 2001 (Invited Review/Tutorial Article).
 E. Gad, R. Khazaka, M. Nakhla
and R. Griffith, "A Circuit Reduction Technique for Finding the Steady State
Solution of Nonlinear Circuits," IEEE Transactionson Micorwave Theory and
Techniques, vol. 38, pp. 23892396, Dec. 2000.
 A. Dounavis, E. Gad, R. Achar and M. Nakhla, "Passive Model Reduction of
Multiport Distributed Interconnects," IEEE Transactions on Microwave Theory
and Techniques, vol. 48, pp. 23252334, Dec. 2000.
 R. Khazaka, P. Gunupudi and M. Nakhla, "Efficient
Sensitivity Analysis of TransmissionLine Networks using Model Reduction
Techniques," IEEE Transactions MTT, vol. 38, pp. 23452351, Dec. 2000.
 I. Erdin, M. Nakhla and R.
Achar, " Circuit Analysis of Electromagnetic Radiation and Field Coupling
Effects for Networks with Embedded FullWave Modules," IEEE Transactions on
Electromagnetic Compatibility, vol. 42, pp.449460, Nov. 2000.
 A. Dounavis, R. Achar and M.
Nakhla, "Efficient Passive Circuit Models for Distributed Networks with
FrequencyDependent Parameters," IEEE Transactions on Advanced Packaging, vol.
23, no. 3, pp 382392, August 2000.
 P. K. Gunupudi, M. S. Nakhla
and R. Achar, "Simulation of highspeed distributed interconnects using
multipoint Krylov subspace techniques," IEEE Transactions on Computeraided
Design of Integrated Circuits and Systems, pp. 799808, July 2000.
 N. Soveiko and M. Nakhla, "Efficient capacitance extraction computations
in Wavelet Domain," IEEE Transactions on Circuits and SystemsI, pp. 684701,
May 2000
 R. Achar, M. Nakhla, P. Gunupudi and E. Chiprout, " Passive Multilevel
Multipoint Interconnect Reduction Algorithm for Macromodeling of Multiport
Networks Including Distributed Elements", IEEE Transactions on Circuits and
SystemII, pp. 287301, April 2000
 A. Dounavis, X. Li, M. Nakhla and R. Achar, "Passive ClosedForm
TransmissionLine Model for GeneralPurpose Circuit Simulators," IEEE
Transactions on Microwave Theory and Techniques, vol. 47, no. 12, pp
24502459, Dec. 1999.
 H. Zaabab, Q.J. Zhang, and
M.S.Nakhla, "A neural network delay macromodel of highspeed CMOS and BiCMOS
circuits," to appear in the International Journal of Analog Integrated
Circuits, (15 pages).
 M. A. Kolbehdari , M. Nakhla
and M. Sadiku, "Hyprid model of electromagnetic scattering from eccentric
dielectric cylinders," Special issue of the Journal of the Franklin Institute
on Antennas and Microwave Technology, Vol. 335B, No.8, pp. 4351, Feb. 1999.
 M. A. Kolbehdari and M. Nakhla, "Reducedorder method for dielectric
resonators using FEM and CFH," International Journal for computation and
Mathematics in Electrical Engineering vol. 18,pp. 8494, January'99.
 I. Erdin, M. Nakhla and R. Khazaka, "Simulation of highspeed
interconnects in multilayered medium in the presence of incident Field," IEEE
Trans. Microwave Theory and Techniques, vol. 46, pp.22512257., December
1998.
 R. Achar, M. Nakhla, Q.J. Zhang, "FullWave Analysis of HighSpeed
Interconnects Using Complex Frequency Hopping," IEEE Transactions on
ComputerAided Design of Integrated Circuits and Systems, vol. 17 , pp. 997 
1016, October 1998.
 R. Khazaka and M.Nakhla, "Analysis of highspeed interconnects in the
presence of electromagnetic interference," IEEE transactions on microwave
theory and techniques, vol. 46, pp. 940947, July 1998.
 H. Zaabab, Q.J. Zhang and M. Nakhla, "Device and circuitlevel modelling
using Neural Networks with faster training based on network sparsity," IEEE
Trans. Microwave Theory and Techniques, vol. 45, pp. 16961704, October 1997.
 A. Veluswami, M. Nakhla and Q.J. Zhang, "The application of neural
networks to EMbased simulation and optimization of interconnects in
highspeed VLSI circuits" IEEE Transactions on Microwave Theory and
Techniques, Special issue on Automated Circuit Design Using Electromagnetic
Simulators, pp. 712723, May 1997 (invited paper) .
 M. A. Kolbehdari and M. Nakhla, " Electromagnetic Modelling and
Simulation of Multiconductor Interconnect Networks with Inhomogeneous
Cylindrical Substrate," IEE Proceedings on Microwaves, Antennas and
Propagation, February 1997.
 Q.J. Zhang, F. Wang and M.S.
Nakhla, "Optimization of highspeed VLSI interconnects: a review," Int.
Journal on Microwave and Millimeterwave ComputerAided Engineering, Special
Issue on Optimization Oriented Microwave CAD, vol. 6, pp.83107, 1997
(invited paper ) .
 M. Kolbehdari, M.S. Nakhla, Q.J. Zhang, M. Srinivasan and R. Achar,
"Simultaneous time and frequency domain solutions of EM problems using finite
element and CFH techniques," IEEE Trans. Microwave Theory and Techniques, vol.
44, pp. 15261534, September 1996.
 M. Li, Q.J. Zhang and M.S. Nakhla, "Finite difference solution of EM
fields by asymptotic waveform techniques,", IEE Proceedings on Microwaves,
Antennas and Propagation, vol. 143, pp. 512520, 1996.
 J. Williamson, M. Nakhla, Q.J. Zhang and P.D. van der Puije, " Ground
noise minimization in integrated circuit packages through pin assignment
optimization, " IEEE Trans. on Components, Packaging and Manufacturing
Technology , Part B, vol. 19, pp. 361371, May 1996.
 D. Liu, V. Phailatha, Q.J. Zhang and M. Nakhla, "Asymptotic thermal
analysis of electronic packages and printed circuit boards," IEEE Trans. on
Components, Packaging and Manufacturing Technology , Part A, vol. 18, pp.
781787, December 1995.
 H. Zaabab, Q.J. Zhang and M. Nakhla, "A neural network modeling approach
to circuit optimization and statistical design," IEEE Trans. Microwave Theory
and Techniques, vol. 43, pp. 13491358, June 1995 .
 E. Chiprout and M. Nakhla, "Analysis of interconnect networks using
complex frequency hopping (CFH)," IEEE Transactions on Computeraided Design ,
vol. 15, pp.186 200, Feb. 1995.
 M. Kolbehdari and M. Nakhla, "Analysis of interconnect networks with
conducting wedge loaded by an inhomogeneous dielectric substrate," IEE
Proceedings on Microwaves, Antennas and Propagation, vol. 143, No.3, pp.
217224, June 1996 .
 R.L. Liu, Q.J. Zhang and M. Nakhla, "Successive asymptotic waveform
evaluation of lossy distributed networks with nonlinear terminations," IEE
Proceedings on Microwaves, Antennas and Propagation, vol. 141, No.6, pp.
473476, 1994.
 S. Manney, M. Nakhla and Q.J. Zhang, "Analysis of nonuniform frequency
dependent highspeed interconnects using numerical inversion of Laplace
transform," IEEE Trans. ComputerAided Design, vol. 13, pp. 15131525,
December 1994.
 R. Sanaie, E. Chiprout, M.S. Nakhla and Q.J. Zhang, "Fast method for
frequency and time domain simulation of highspeed VLSI interconnects," IEEE
Trans.on Microwave Theory and Techniques, vol. 42, pp. 25622571, December
1994.
 N. Liu, M. Nakhla and Q.J. Zhang, "Time domain sensitivity of highspeed
VLSI interconnects," International Journal on Circuit Theory and Applications,
vol. 22, pp.479511, November 1994.
 Y.J. Wei, Q.J. Zhang and M. Nakhla, "Multilevel optimization of highspeed
VLSI interconnect networks by decomposition," IEEE Trans. Microwave Theory and
Techniques, vol. 42, pp. 16381650, September 1994.
 Q.J. Zhang and M. Nakhla, "Statistical simulation and optimization of VLSI
interconnects," International Journal on Analog Integrated Circuits and Signal
Processing, Special Issue on HighSpeed Interconnects, vol. 5, pp. 95106,
1994.
 M. Nakhla, "Error probability for multilevel digital systems in presence
of intersymbol interference and additive noise", IEEE Transactions on
Communications , vol. 42, pp. 23802383, July 1994.
 S. Lum, M. Nakhla and Q.J. Zhang, " Sensitivity analysis of lossy coupled
transmission lines with nonlinear terminations", IEEE Transactions on
Microwave Theory and Techniques , vol. 42, pp. 607615, April 1994.
 L. Lu , M. Nakhla and Q.J. Zhang , " A stepping algorithm for transient
analysis of distributed networks", IEEE Transactions on Microwave Theory and
Techniques , pp. 494500, March 1994.
 D. Xie and M. Nakhla, " Delay and crosstalk simulation of highspeed VLSI
interconnects with nonlinear terminations", IEEE Transactions on
Computeraided Design of Integrated Circuits and Systems , pp. 17981811,
November 1993.
 R. Liu, Q.J. Zhang and M. Nakhla, " A frequency domain approach for
performance optimization of highspeed interconnects", IEEE Transactions on
Microwave Theory and Techniques , vol.40, pp. 24032411, December 1992 .
 R. Griffith, E. Chiprout, Q.J. Zhang and M. Nakhla, " A CAD framework for
simulation and optimization of highspeed VLSI interconnects", IEEE
Transactions on Circuits and Systems , vol.39, pp.839906, December 1992.
 R. Griffith and M. Nakhla, " Mixed frequency/time domain analysis of
nonlinear circuits", IEEE Transactions on Computeraided Design of Integrated
Circuits and Systems , vol.11, pp.10321043, August 1992.
 Q.J. Zhang , S. Lum and M. Nakhla , " Minimization of delay and crosstalk
in highspeed VLSI interconnects", IEEE Transactions on Microwave Theory and
Techniques , vol.MTT40, pp.15551563, July 1992.
 T. Tang and M. Nakhla , " Analysis of highspeed
VLSI interconnects using the asymptotic waveform evaluation technique" , IEEE
Transactions on Computeraided Design of Integrated Circuits and Systems,
vol.11, pp.341352, March 1992.
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Refereed International Conferences
(Recent)
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 I. M. Elfadel,
H. M. Huang, A. E. Ruehli, A. Dounavis, M. Nakhla "A Comparative Study of Two
Transient Analysis Algorithms for Lossy Transmission Lines with
FrequencyDependent Data",
Proc. IEEE Electrical Performance of Electronics Packaging EPEP2001,
accepted Oct. 2001
 P. Gunupudi, R. Khazaka, and M. Nakhla "Analysis of transmission
line circuits using multidimensional model reduction techniques," Proc.
IEEE Electrical Performance of Electronics Packaging EPEP2001 , Oct. 2001.
(Accepted for publication).
 P. Gunupudi, R. Khazaka, A. Dounavis, R. Achar and M. Nakhla,
"Global multilevel reduction technique for nonlinear simulation of highspeed
interconnects," Proc. IEEE Electrical Performance of Electronics Packaging
EPEP2001, Oct. 2001 (Accepted for publication).
 A. Dounavis, R. Achar and M. Nakhla, "A General Class of Passive
Macromodels for Efficient Sensitivity Analysis of HighSpeed Distributed
Interconnects with Nonlinear Terminations," IEEE 8^{th}
International Conference on Electronics, Circuits and Systems, pp 899902,
Malta, Sept. 2001.
 I. Erdin, A. Dounavis, R. Achar, M. Nakhla, "Circuit Simulation of
Incident Field Coupling to Multiconductor Transmission Lines with
FrequencyDependent Losses," IEEE EMC International Symposium, Montreal, pp.
10841087, Aug. 2001.
 A. Dounavis, R. Achar and M. Nakhla, "Efficient Sensitivity
Analysis of Lossy Multiconductor Transmission Lines with Nonlinear
Terminations," IEEE MTTS International Microwave Symposium Digest,
Phoenix, AZ, pp. 20992102 June 2001.
 R. Khazaka, and M. Nakhla"MultiLevel Passive Order Reduction of
Interconnect Networks," IEEE MTTS International Microwave Symposium,
pp. 11551158, May 2001.
 R. Khazaka, and M. Nakhla "Addressing redundant poles in Krylov
based model reduction," Proc. IEEE Signal Propagation on Interconnects, pp.
14, May 2001.
 A. Dounavis, P. K. Gunupudi, E. Gad, R. Khazaka, R. Griffith, R.
Achar and M. Nakhla, "Addressing Transient Analysis of Multiport Distributed
Interconnects," IEEE 9th Topical meeting on Electrical Performance of
Electronic Packaging, Phoenix, AZ, pp 243246, Oct. 2000.
 P. Gunupudi and M. S. Nakhla, "MultiDimensional Model Reduction of
VLSI Interconnects," IEEE Custom Integrated Circuits Conference, pp. 499502,
June 2000.
 E. Gad, A. Dounavis, M. Nakhla and R. Achar, "Passive Model Order
Reduction of Multiport Distributed Interconnects," Proceeding DAC, Los
Angeles, CA, vol. 37, pp 526531, June 2000.
 R. Khazaka, P.
Gunupudi and M. Nakhla, "Efficient Sensitivity Analysis of TransmissionLine
Networks using Model Reduction Techniques," IEEE MTTS International
Microwave Symposium, vol. 2, pp. 895898, June 2000.
 A. Dounavis, E. Gad, R. Achar
and M. Nakhla, "Passive ModelReduction of Distributed Networks with
FrequencyDependent Parameters," IEEE MTTS International Microwave
Symposium Digest, Boston, Massachuseetts, vol 3, pp 17891792, June 2000.
 E. Gad, R. Khazaka, M. Nakhla
and R. Griffith, "Circuit reduction technique for finding the steady state
solution of nonlinear circuits," IEEE MTTS International Microwave
Symposium, vol. 1, pp. 8386, June 2000.
 E. Gad and M. Nakhla, "Model
Reduction for DC Solution of Large Nonlinear Circuits," IEEE International
Conference on Computer Aided Desig, ICCAD99, San José, CA, pp. 376379,
Nov. 1999.
 I. Erdin and M. Nakhla,
"Mixed Circuit/Electromagnetic Analysis of Field coupling to HighSpeed
Interconnects In Inhomogeneous Medium," IEEE 1999 International Symposium
on Electromagnetic Compatibility, (Seattle, Washington).
 P. K. Gunupudi, M. S. Nakhla
and R. Achar, "Multipoint multiport reduction of highspeed distributed
interconnects using krylovspace techniques," International Symposium on
Circuits and Systems, Orlando, Florida, May 1999, vol. 6, pp 242245.
 I. Erdin and Michel Nakhla, "Mixed Circuit/Electromagnetic Analysis
of Radiation from HighSpeed Interconnects," IEEE 1999 MTTS International
Microwave Symposium.
 P. K. Gunupudi and M. S. Nakhla, "Modelreduction of nonlinear
circuits using krylovspace techniques," IEEE Design Automation Conference,
New Orleans, pp 1316, June 1999.
 A. Dounavis, X. Li, M. Nakhla and R. Achar, "Passive ClosedForm
Transmission Line Model for General Purpose circuit simulators," IEEE MTTS
International Microwave Symposium Digest, Anaheim, CA, vol 1, pp 377380.
June 1999.
 R. Achar and M. Nakhla, "Efficient Simulation of onchip RF
components using modelreduction techniques", IEEE International Symposium
on Circuits and Systems (ISCAS), Orlando, USA, 1999.
 R. Achar, P. Gunupudi
and M. Nakhla, "Multilevel Multipoint ModelReduction Algorithm for
Macromodeling of Multiport Distributed Networks", 3rd IEEE International
Workshop on Signal Propagation on Interconnects, Hannover, Germany, 1999
(invited).
 M. Nakhla and R. Achar,
"Recent Advances in Modeling and Simulation of HighSpeed VLSI
Interconnections", 1999 Workshop on Circuits and Systems, (invited).
 M. Nakhla, , R. Achar and P. Gunupudi, "Simulation of HighSpeed
Interconnects using Multilevel ModelReduction Techniques", IMPAS99,
Calif. USA, 1999 (invited).
 P. K. Gunupudi, R. Achar, M. S. Nakhla and A. Dounavis, "Simulation
of Distributed Interconnects with Frequency Dependent Parameters Using
KrylovSpace Techniques," ECS/IEEE European Conference on Circuit Theory
and Design, August 1999, Stresa, Italy, pp. 425428. (invited).
 A. Dounavis, X. Li, M. Nakhla and R. Achar, "Passive ClosedForm
Transmission Line Model for General Purpose circuit simulators," IEEE MTTS
International Microwave Symposium Digest, Anaheim C. A., vol 1, pp
337380. June 1999.
 P. K. Gunupudi, M. S. Nakhla and R. Achar, "Efficient simulation of
high speed distributed interconnects using krylovsubspace techniques,"
IEEE 7^{th} Topical meeting on Electrical Performance of Electronic
Packaging, NY, Oct 1998, pp. 295298. (Best Paper Award)
 I. Erdin, R. Khazaka and M. Nakhla," EM field coupling to
multiconductor transmission lines in multilayyered medium", 1998 IEEE MTTS
International Microwave Symposium, vol. 3, pp. 12631266, June 1998,
Baltimore, USA.
 R. Achar and M. Nakhla, "A novel technique for minimumorder
macromodel synthesis of highspeed interconnect subnetworks", 1998 IEEE
International Symposium on Circuits and Systems (ISCAS), June, 1998,
Monterey, CA.
 X. Li, M. Nakhla and R, Achar, "A universal closedloop highspeed
interconnect model for general purpose circuit simulators", 1998 IEEE
International Symposium on Circuits and Systems (ISCAS), June, 1998,
Monterey, CA.
 R. Achar, M. Nakhla and E. Ahmed "Nonlinear transient simulation of
embedded subnetworks characterized by sparameters using complex frequency
hopping", 1998 IEEE MTTS International Microwave Symposium, June 1998,
Baltimore, USA.
 R. Achar and M. Nakhla, "Addressing passivity issues in CFH",
2nd IEEE International Workshop on Signal Propagation on Interconnects,
May 1998 (Hannover, Germany).
 Q. Zhang, F, wang, M. Nakhla, J. Bandler and R.M. Biernacki, "
Signal integrity optimization of highspeed VLSI packages and interconnects, "
IEEE Electronic Components and Technology Conference, (Seattle, Washington),
May 1998.
 R. Griffith and M.
Nakhla, " A new highorder absolutely stable explicit numerical integration
algorithm for the timedomain simulation of nonlinear circuits" , IEEE
Int. Conf. Computer Aided Design, (San Jose, CA), November 1997 .
 R. Achar and M. Nakhla "A fast method for nonlinear simulation of
transmision line networks", International Symposium on Nonlinear Theory and
Its Applications (NOLTA), Nov. 1997, Hawaii, USA (INVITED PAPER ) .
 R. Achar, M.
Nakhla and E. Chiprout, "Block CFH: A modelreduction technique for
distributed interconnect networks", European Conference on Circuits Theroy and
Design (ECCTD), Sept 1997, Budapest, Hungary (invited) .
 M. Nakhla, R. Achar and M. A. Kolbedhari, "Modelreduction
techniques for EM and mixed EM/circuit simulation", URSI North American Radio
Science Meeting, July 1997, pp.165171 Montreal, Canada, (invited)
 R. Achar, M. A. Kolbehdari and M. Nakhla, "A unified approach for
mixed EM/circuit simulation using modelreduction techniques", IEEE
International Microwave Symposium Digest, June 1997, pp. 10171021, Denver,
USA.
 M. Nakhla, R. Khazaka and R. Achar, "A universal macromodelling
technique for highspeed VLSI interconnects", IEEE Inernational Workshop on
"Signal Propagation on Interconnects", May 1997, Hannover, Germany,
(invited paper ) .
 M. A. Kolbedhari, M. Nakhla, R. Achar and M. Srinivasan, "Solution
of EM problems using reducedorder models by complex frequency hopping", 13th
IEEE Annual Review of Progress in Applied Computational Electromagnetics,
March, 1997, Montrery, California, (invited paper ) .
 A. Veluswami, M. Nakhla and Q.J. Zhang, " Modelling the
frequencydependent parameters of highspeed interconnects : a neural network
approach," IEEE Multichip Module Conference, (Santa Cruz, CA), Feb.
1997.
 G.W. Zheng, Q.J. Zhang, M.S. Nakhla and R. Achar, "An efficient
approach for moment matching simulation of linear subnetworks with measured or
tabulated data," IEEE Int. Conf. ComputerAided Design, (San Jose, CA),
November 1996 .
 Q.J. Zhang, F.Wang and M.S. Nakhla, "Optimization of highspeed
VLSI interconnects," Symp. on Antenna Technol. and Appl. Electromagnetics 
ANTEM'96 (Montreal, Canada), pp. 265268, August 1996.
 G.W. Zheng, Q.J. Zhang and M.S. Nakhla, "CFH simulation for
highspeed VLSI interconnects with 3D full wave model," Symp. on Antenna
Technol. and Appl.Electromagnetics  ANTEM'96, (Montreal, Canada), pp.
277280, August 1996.
 M. Kolbehdari and M. Nakhla, " Analysis of inhomogeneous dielectric
resonator structures using FEM and CFH," Symp. on Antenna Technol. and
Appl.Electromagnetics  ANTEM'96, (Montreal, Canada), pp.3537, August
1996.
 R. Khazaka and M. Nakhla, " Analysis of highspeed interconnects in
the presence of electromagnetic interference," IEEE International Microwave
Symp. Digest , (San Franscisco, CA), pp. 18111814, May 1996.
 V. Phanilatha, M.Nakhla and Q.J. Zhang, " Finite element thermal
analysis of electronic packages and boards using momentmatching techniques, "
Inter. Society Conf. Thermal Phenomena on Electronic Systems (ITHERM),
(Orlando, FL), pp. 391395, May 1996.
 R. Khazaka, J. Poltz, M. Nakhla and Q.J. Zhang, " A fast method for
simulation of lossy interconnects with frequency dependent parameters,"
IEEE MultiChip Module Conference , (Santa Cruz, CA), pp. 9598, February
1996.
 R. Achar, M. Nakhla and Q.J. Zhang, " Addressing high frequency
effects in VLSI interconnects with full wave model and CFH," IEEE
International Conference on ComputerAided Design , (Santa Clara, CA), pp.
5357, November 1995.
 H. Zaabab, Q.J. Zhang and M. Nakhla, " Application of neural
networks in circuit analysis, " IEEE Int. Conf. Neural Networks,
(Perth, Australia), pp. 423426, November 1995 .
 M. Nakhla , " Recent progress in the simulation of high speed VLSI
interconnects ," Topical Meeting on Electrical Performance of Electronic
Packaging, (Portland, Oregon), October 1995 (invited) .
 M. Li, Q.J. Zhang and M.S. Nakhla, "Solution of EM fields by
asymptotic waveform techniques," URSI International Symp. Signals, Systems
and Electronics, (San Francisco, CA), pp. 393396, October 1995.
 R. Achar, M. Nakhla and Q.J. Zhang, " Moment matching techniques
for transient analysis of high speed VLSI interconnects with full wave model",
25th European Microwave Conference, (Bologna, Italy), pp. 820823,
Sept. 1995.
 M. Kolbehdari, M. Nakhla and Q.J. Zhang, " Solution of EM problems
using finite element and complex frequency hopping techniques, " 25th
European Microwave Conference, (Bologna, Italy), pp. 10791081, Sept.
1995.
 M. Nakhla," Tools for signal integrity analysis and optimization,"
Advanced Routing Workshop, CALCE Electronic Packaging research Center,
(Maryland), September'95 (invited).
 A. Veluswami, H.
Zaabab, Q.J. Zhang and M.S. Nakhla, "The application of neural networks to
highspeed VLSI interconnect simulation," Canadian Conference on Electrical
and Computer Engineering, (Montreal, Canada), pp 381384, September 1995.
 R. Achar, R. Khazaka, R. Griffith, M.S. Nakhla and Q.J. Zhang,
"Simulation of delay and crosstalk in highspeed VLSI interconnects,"
Canadian Conferenc on Electrical and Computer Engineering, (Montreal,
Canada), pp. 385388, September 1995.
 A. Veluswami, Q.J. Zhang and M. Nakhla, "A neural network model for
propagation delays in systems with highspeed VLSI interconnect networks,"
IEEE Custom Integrated Circuits Conference, (Santa, Clara, CA), pp.
387390, May 1995 .
 V. Phanilatha, D.G. Liu, M. Nakhla and Q.J. Zhang, "Nonlinear
transient thermal analysis using circuit simulation techniques," 45th IEEE
Electronics Components and Technology Conference , (Las Vegas, NV),
pp. 879883, May 1995 .
 Q.J. Zhang, F. Wang and M.S. Nakhla, "A highorder temporal neural
network for word recognition," IEEE International Conf. Acoustics, Speech
and Signal Processing, (Detroit, MI), pp. 33433346, May 1995.
 D.G. Liu, V. Phanilatha, Q.J. Zhang and M.S. Nakhla, "Asymptotic
thermal analysis of electronic packages and printed circuit boards," IEEE
SemiTherm Symposium (San Jose, CA), pp. 131135, Feb. 1995.
 K. Mihan, B. Stacey, M. Nakhla and Q.J. Zhang, "Concurrent thermal
and electrical optimization of highspeed packages and systems," INTERpack:
ASME International Intersociety Electronic Packaging Conference, (Lahaina,
Hawaii), pp. 221227, March 1995.
 R. Khazaka, E. Chiprout, M. Nakhla and Q.J. Zhang, "Analysis of
highspeed interconnects with frequency dependant parameters," 11th
International Zurich Symp. on Electromagnetic Compatibility, (Zurich,
Switzerland), pp. 203208, March 1995 .
 Q.J. Zhang and M.S. Nakhla, "Simulation and optimization of VLSI
interconnects in printed circuit bords," International Conference on
Package and PCB Technology (Beijing, China), September 1994.
 Q.J. Zhang and M. Nakhla, "Signal integrity analysis and
optimization of VLSI interconnects using neural network models," Proc. IEEE
International Symp. Circuits and Systems, (London, England), pp. 459462,
June 1994.
 H. Zaabab, Q.J. Zhang and M. Nakhla, "Analysis and optimization of
microwave circuits and devices using neural network models," IEEE
International Microwave Symp. Digest , (San Diego, CA), pp. 393396, May
1994.
 L.Li, O.J. Zhang and M. Nakhla, " A moment method for statistical
analysis of highspeed VLSI interconnects", Proceedings of the IEEE
Custom Integrated Circuit Conference , (San Diego, CA), pp. 305308, May
1994 .
 R. Sanaie, E. Chiprout, M. Nakhla and Q.J. Zhang, " Fast method for
frequency and time domain simulation of highspeed VLSI interconnects, "
Proceedings of the IEEE International Microwave Symposium , (San Diego,
CA) , pp. 14171420, May 1994.
 R. Sanaie, E. Chiprout, M. Nakhla and Q.J. Zhang, " Integrating
subnetworks characterized by measured data into momentmatching simulations",
Proceedings of the IEEE MultiChip Module Conference , (Santa Cruz, CA)
, pp. 114119, March 1994 .
 M. Nakhla and Q.J. Zhang, " Transient analysis of nonlinear
circuits with frequencydependent parameters ", International Symposium on
Nonlinear Theory and Applications , (Waikiki, Hawaii), pp. 323328,
December 1993 (invited).
 E. Chiprout, H.
Heeb, M. Nakhla and A.E. Ruehli, " Simulating 3D retarded interconnect models
using complex frequency hopping", IEEE International Conference on
ComputerAided Design, (Santa Clara, CA), pp.6672, November 1993 .
 N. Liu, M. Nakhla and Q.J. Zhang, "Timedomain sensitivity of
highspeed VLSI interconnects," 3rd International Conference on VLSI and
CAD , (Teajon, Korea), pp. 6871, November 1993.
 S. Manney, M. Nakhla and Q. Zhang," Transient analysis of
nonuniform transmission lines using asymptotic waveform evaluation ", 23rd
European Microwave Conference , (Madrid, Spain) , Septmber 1993.
 R.Liu, Q.J.Zhang and M.Nakhla, " Successive Asymptotic Waveform
Evaluation of Lossy Distributed Networks with Nonlinear Terminations", 23rd
European Microwave Conference , (Madrid, Spain) , Septmber 1993.
 J. Williamson, K. Kalaichelvan, M. Nakhla, Q.J. Zhang and P.van der
Puije," Ground noise estimation and minimization in integrated circuit
packages", IEEE International Conference on Electromagnetic Compatibility ,
(Dallas, TX), pp. 425428, August 1993.
 E. Chiprout and M. Nakhla, " Addressing highfrequency issues in
asymptotic waveform evaluation", Design Automation Conference ,
(Dallas, TX) , pp.732736, June 1993.
 R. Griffith, Q.J. Zhang and M. Nakhla," Parallel timedomain
analysis and optimization of distributed VLSI interconnects", IEEE
International Symposium on Circuits and Systems , (Chicago, IL), pp.
15431546, May 1993 .
 Y.Wei ,Q.J. Zhang and M. Nakhla ," Multilevel optimization of
highspeed VLSI interconnects using decomposition", IEEE Custom Integrated
Circuit Conference , (San Diego,CA),pp. 29.5.129.5.4, May 1993.
 Q.J. Zhang and M. Nakhla, "Yield analysis and optimization of VLSI
interconnects in multichip modules", IEEE MultiChip Module Conference ,
(Santa Cruz, CA), pp.160163, March 1993 .
 R.Griffith, Q.J. Zhang and M. Nakhla, " Parallel timedomain
analysis and optimization of highspeed interconnects", Proceedings of the
Sixth SIAM Conference on Parallel Processing, pp.225227, March 1993 .
 E. Chiprout and M. Nakhla ," Transient waveform estimation of
highspeed MCM networks using complex frequency hopping", Proceedings of
the IEEE MultiChip Module Conference , (Santa Cruz, CA), pp.134139 ,
March 1993.
 S. Manney, M. Nakhla and Q.J. Zhang ," Time domain analysis of
nonuniform frequency dependent highspeed interconnects", Proceedings of
the IEEE International Conference on ComputerAided Design , (Santa Clara,
CA) , pp. 449452, November 1992 .
 H. Besbes, M. Nakhla and Q.J. Zhang , "Analysis of fiber optic
communication systems using the saddlepoint approximation", International
Workshop on ComputerAided Modeling, Analysis and Design of Communication
Links and Networks, September 1992.
 S. Lum, M. Nakhla and Q.J. Zhang, " Sensitivity analysis of lossy
coupled transmission lines with nonlinear terminations", Proceedings of
the European Microwave Conference , (Espoo, Finland), pp. 813818,
August 1992.
 E. Chiprout, and M. Nakhla," Generalized moment matching methods
for transient analysis of interconnect networks", Proceedings of the Design
Automation Conference , (Anaheim, CA) , pp.201206, June 1992.
 R. Liu, Q.J. Zhang and M. Nakhla, "Exact group delay sensitivities
for minimization of delay and distortion in highspeed VLSI interconnects",
Proceedings of the IEEE International Microwave Symposium , ( Albuquerque,
NM), pp.833836, June 1992.
 E. Chiprout, and M. Nakhla, "Fast nonlinear waveform estimation of
large distributed networks", Proceedings of the IEEE International
Microwave Symposium , ( Albuquerque, NM) , pp.1341 1344, June 1992.
 E. Chiprout and M. Nakhla, " Optimal pole selection in asymptotic
waveform evaluation", IEEE International Symposium on Circuits and Systems
, (San Diego, CA), pp.19611964, May 1992.
 L. Lu , M. Nakhla and Q.J. Zhang, " A stepping algorithm for
transient analysis of distributed networks", Proceedings of the IEEE
International Symposium on Circuits and Systems , (San Diego, CA),
pp.19571960, May 1992.
 Q.J. Zhang, S. Lum and M. Nakhla , " Minimization of delay and
crosstalk in highspeed VLSI interconnects", Proceedings of the IEEE Custom
Integrated Circuit Conference , (Boston, MA), pp. 15.5.115.5.4, May 1992.
 M. Nakhla and Q.J. Zhang, " Simulation and optimization of
interconnection delay and crosstalk in multichip modules", IEEE
MultiChip Module Conference , (Santa Cruz, CA), pp.5659, March 1992.
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ComputerAided
Engineering Research LAB (CAEL)
Professors: Michel Nakhla and Ram Achar
5170 ME, Department of
Electronics, Carleton University
Ottawa, Ontario, Canada  K1S 5B6
Ph:
6135205651;
Fax: 6135205708
Email:
(msn, achar)@doe.carleton.ca
URL:
http://www.doe.carleton.ca/~achar/cael.html
Other Useful Links
Department of Electronics
Carleton
University
Graduate Studies @ Carleton
International Students Information:
(a),
(b)
OCIECE: OttawaCarleton Institute for Electrical and Computer Engineering
Prof.
Michel Nakhla;
Prof. Ram Achar
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4th Year
Projects
Project: Development of HighSpeed Interconnect Models and Efficient
Simulators.
Introduction: With the continually rising operating frequencies, interconnects
are becoming major bottlenecks for highspeed designs. Highspeed interconnect
effects such as ringing, signal delay, distortion, reflections
and crosstalk can severely degrade the system performance. Interconnects can
exist at various levels of design
hierarchy such as onchip, packaging structures, multichip modules, printed
circuit boards and backplanes.
However, conventional circuit simulators do not handle the interconnect analysis
efficiently.
Goal: The objectives of this project are:
 To develop interconnect models that are
suitable for inclusion in SPICElike conventional simulators.
 To develop
efficient simulation algorithms and software tools for highspeed circuit
analysis.
Requirements:

Strong background in mathematics (specifically in linear
systems, ordinary differential equations, Laplace transform, Numerical
analysis),

Good proficiency in software development and programming (C or C++ or Java
and Matlab).

Strong analytical ability
Each participating student will be assigned a specific module of the project.
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