The Experts below are selected from a list of 1830 Experts worldwide ranked by ideXlab platform
Sung-mo Kang - One of the best experts on this subject based on the ideXlab platform.
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fast approximation of the transient response of Lossy Transmission Line trees
Design Automation Conference, 1993Co-Authors: M Sriram, Sung-mo KangAbstract:An efficient technique for estimating the time-domain response of Lossy tree-like interconnect structures is presented. The approach is based on approximating such structures by a tree of RLGC sections, and computing a low order approximation to its transfer function. Unlike the Asymptotic Waveform Evaluation approach, the reciprocal of the transfer function of the tree is expanded as a polynomial in s. Experimental results are presented which demonstrate the higher accuracy of this approach as compared to AWE. A generalization of the procedure for computation of capacitive crosstalk is also presented.
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DAC - Fast Approximation of the Transient Response of Lossy Transmission Line Trees
Proceedings of the 30th international on Design automation conference - DAC '93, 1993Co-Authors: M Sriram, Sung-mo KangAbstract:An efficient technique for estimating the time-domain response of Lossy tree-like interconnect structures is presented. The approach is based on approximating such structures by a tree of RLGC sections, and computing a low order approximation to its transfer function. Unlike the Asymptotic Waveform Evaluation approach, the reciprocal of the transfer function of the tree is expanded as a polynomial in s. Experimental results are presented which demonstrate the higher accuracy of this approach as compared to AWE. A generalization of the procedure for computation of capacitive crosstalk is also presented.
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Computationally efficient simulation of a Lossy Transmission Line with skin effect by using numerical inversion of Laplace transform
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications, 1992Co-Authors: E.c. Chang, Sung-mo KangAbstract:Two computationally efficient methods for simulating a Lossy Transmission Line are developed. The Lossy Transmission Line is represented as a two-port network consisting of characteristic impedances and waveform generators. Equivalent circuits are synthesized for the characteristic impedances, and the values of the waveform generators are computed by performing convolution integrals. Simulated annealing is used for optimal synthesis of the characteristic impedances. To evaluate the convolution integrals, two different methods were devised. One uses the impulse response of the exponential propagation function H(s), while the other utilizes the unit step response of the same function. The first method can be applied to simulation of a general RLCG Transmission Line. The second, which utilizes a numerical technique, is well suited for simulating a Lossy Transmission Line with or without skin effect. Both methods improve the previous art by a factor of two or more in terms of the computation time. >
Pierre Bonnet - One of the best experts on this subject based on the ideXlab platform.
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Time-Domain Software Correction of NonLinear Faulty Lossy Transmission Line Networks
IEEE Transactions on Electromagnetic Compatibility, 2020Co-Authors: Ali Ibrahim, Cédric Chauvière, Pierre BonnetAbstract:In this article, we use Newton's method and the nonLinear least squares method to solve a nonLinear problem in electromagnetic compatibility. Both techniques provide a way to identify the temporal profile of a voltage source that would produce a target voltage over a given time interval at a point of the Transmission Line network presenting nonLinear components. After comparing the results of a test problem, the most efficient method is considered to identify the temporal source in order to bring a software correction to a nonLinear faulty Lossy Transmission Line network. The software correction process may cancel any unintentional perturbations produced by one or more faults regardless of their type and location.
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Active Electromagnetic Interference Control in Time Domain: Application to Software Correction of Defective Lossy Transmission-Line Networks
IEEE Transactions on Electromagnetic Compatibility, 2020Co-Authors: Ali Ibrahim, Cédric Chauvière, Pierre BonnetAbstract:This paper introduces a generalized approach of the Linear combination of configuration field (LCCF) method. The technique developed in this paper provides a way to identify the temporal profile of electromagnetic sources satisfying particular properties for a given target (fields, voltage, or current). Here, we focus on identifying voltage signals that would lead to a specified voltage over a time interval at some points of a network. To experimentally apply the same idea, we propose two possibilities to decrease the maximum frequencies of the voltage signals. The LCCF method is then applied to bring a software correction to a Lossy Transmission-Line network presenting soft or hard defects.
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Software Correction of Defective Lossy Transmission Line Networks
2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring), 2019Co-Authors: A. Al Ibrahim, Cédric Chauvière, Pierre BonnetAbstract:In this paper, we pave the way to identify the temporal profile of electromagnetic (EM) sources satisfying particular properties for a given target voltage. For this purpose, we generalize the Linear combination of configuration field (LCCF) method in the framework of identifying voltage signals that would generate a specified voltage over a time interval at distinct points of a Transmission Line (TL) network. In this paper, the LCCF method is applied to bring a voltage software correction to a Lossy TL network distorted by an interfering external signal. With a view to consider experimental validations, constraints are then added to the LCCF method to decrease the maximum frequencies of the computed signals.
J L Prince - One of the best experts on this subject based on the ideXlab platform.
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Lossy Transmission Line simulation based on closed form triangle impulse responses
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, 2003Co-Authors: Tingdong Zhou, Steven L Dvorak, J L PrinceAbstract:Analytical frequency-domain expressions for single and coupled Transmission Lines with triangular input waveforms are first developed. The inverse Fourier transform is then used to obtain an expression for the time-domain triangle impulse responses for frequency-independent Transmission Line parameters. The integral associated with the inverse Fourier transform is solved analytically using a differential-equation-based technique. Closed-form expressions for the triangle impulse responses are given in the form of incomplete Lipschitz-Hankel integrals (ILHI) of the first kind. The ILHI can be efficiently calculated using existing algorithms. Combining these closed-form expressions for the triangle impulse responses with a time-domain convolution method using a triangle impulse as a basis function, provides an accurate and efficient simulation method for very Lossy Transmission Lines embedded within Linear and nonLinear circuits.
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triangle impulse response tir calculation for Lossy Transmission Line simulation
Electrical Performance of Electronic Packaging, 2001Co-Authors: Tingdong Zhou, Zhaoqing Chen, W D Becker, Steven L Dvorak, J L PrinceAbstract:Triangle impulse responses (TIRs) for Lossy Transmission Lines are accurately calculated using both an inverse fast Fourier transform algorithm and an accelerated inverse Laplace transform algorithm. Frequency dependent Transmission Line parameters, i.e., R, L, G, and C, are employed to model the skin effect and the frequency dependent electrical properties of the substrate material. The calculated TIR can be further used to carry out time domain simulations for a large number of Lossy Transmission Lines. Frequency dependent Line parameters, R, L, G, and C should be used in specific cases to assure the causality of signal waveform, the accuracy of the time delay, and the amplitude of the waveform evaluations in the time domain.
Gerard V. Kopcsay - One of the best experts on this subject based on the ideXlab platform.
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New methodology for combined Simulation of delta-I noise interaction with interconnect noise for wide, on-chip data-buses using Lossy Transmission-Line power-blocks
IEEE Transactions on Advanced Packaging, 2006Co-Authors: Alina Deutsch, Howard H. Smith, Barry J. Rubin, Byron Lee Krauter, Gerard V. KopcsayAbstract:A new technique is described for reducing computational complexity and improving accuracy of combined power distribution and interconnect noise prediction for wide, on-chip data-buses. The methodology uses Lossy Transmission-Line power-blocks with frequency-dependent properties needed for the multigigahertz clock frequencies. The interaction between delta-I noise, common-mode noise, and crosstalk and their effect on timing is illustrated with simulations using representative driver and receiver circuits and on-chip interconnections.
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Methodology to simulate delta-I noise interaction with interconnect noise for wide, on-chip data-buses using Lossy Transmission-Line power-blocks
Electrical Performance of Electronic Packaging, 1Co-Authors: Alina Deutsch, Howard H. Smith, Barry J. Rubin, Byron Lee Krauter, Gerard V. KopcsayAbstract:A new technique is described for reducing computational complexity and improve accuracy of power distribution and interconnect noise prediction for wide, on-chip data-buses. The methodology uses Lossy Transmission-Line power-blocks with frequency-dependent properties needed for the multi-GHz clock frequencies. The interaction between delta-I noise, common-mode noise, and crosstalk is illustrated with simulations using representative driver and receiver circuits and on-chip interconnections.
John L Volakis - One of the best experts on this subject based on the ideXlab platform.
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distributed lumped loads and Lossy Transmission Line model for wideband spiral antenna miniaturization and characterization
IEEE Transactions on Antennas and Propagation, 2007Co-Authors: B A Kramer, Chichih Chen, John L VolakisAbstract:A Lossy Transmission-Line model that incorporates the radiation resistance of small loop antennas is introduced to characterize the input impedance of a spiral antenna over a large frequency range. This model also leads to a concept of controlling the current velocity and impedance on a spiral antenna by introducing distributed reactive loading along the spiral arms. An important application of the concept is to reduce antenna size and this is demonstrated by numerical simulation examples.
