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We consider the evolution of EMC modeling techniques in this companion paper to the keynote address. The impact of work in the past is considered and an overview and summary of the relevant techniques used today is given. We also attempt to predict future trends based on observations on past and todaypsilas progress. Fortunately for the industry, EMC modeling has expanded considerably in the last...
In this paper we identify some challenges in real-world EMI/EMC problems, which we have recently encountered in the process of designing complex systems for computers, communication and radar, that are beyond the capabilities of present day commercial computer codes. We then go on to describe some novel approaches for handling the problems for this type that are beyond the reach of codes that are...
The following document gathers a collection of information and trends about integrated circuit (IC) technology to build a tentative roadmap for ElectroMagnetic Compatibility (EMC) of ICs until year 2020, with focus on embedded system-on-chip (SoC) for automotive and consumer electronics applications.
In digital designs, it becomes more and more important to reduce the supply current variations (di/dt noise) they induce in the supply lines. This is due to the fact that steep variations in supply current give rise to EM (Electro-Magnetic) radiation. In this paper, two new modified low-noise logic styles - Complementary-CBL (C-CBL) and Enhanced-CSL (E-CSL) are presented in which the di/dt noise due...
The freeware entitled IC-EMC is a windows-based software demonstrator which aims at simulating parasitic emission and susceptibility of integrated circuits. The following paper describes the main simulation features of this tool through several examples.
This paper provides an overview of several novel approaches to enhance todaypsilas automotive EMC simulation. The introduction of fast and efficient modeling and solving techniques for models of passive PCB traces leads to an improved computational performance. Additionally, the development of a methodology enabling co-simulations of VHDL-AMS models of active IC devices yields more accurate numerical...
The electromagnetic emission of complex very large scale integrated circuits is determined by their operation activity plus the manifold noise propagation paths through the on-chip power routing, the package traces and the planes and traces on the printed circuit board. Good simulation models have to serve two main interests: (1) identification of emission-related IC design weaknesses and estimation...
This paper presents an approach to simulate the immunity of the microcontroller based on dynamic, nonlinear and passive model. By introducing the dynamic elements, this modelling technique reflects both those dynamic and nonlinear behaviour of ports and cores of the microcontroller. It can simulate not only external interference from outside but also the internal interference of the microcontroller...
This paper deals with the modelling of the susceptibility to RF aggression of several input buffers structures implemented in a 90 nm test-chip. Measurement results, model construction and simulation flow are detailed.
This paper introduces an automated extraction flow for the passive distribution network (PDN) of a complex integrated circuit. This extraction makes it possible to predict the propagation of external and internal electromagnetic disturbances on power supply networks inside the circuit and, consequently, to have a better knowledge of the conducted emission and immunity of this circuit. This method...
Two measurement environments are put forth for PCI power integrity. These measurement environments are proposed to analyse the PCI power integrity under a HW/SW-codesign scenario BI coding. The experiment results show that, by applying the proposed environments to the same PCI target, cost is reduced while the measurement quality remains almost the same.
This paper focus on a general-purpose FDTD-based solver, called general electromagnetic solver (GEMS), designed for modeling and simulating a wide variety of large-scale electromagnetic problems, involving microwave circuits, RF and digital electronic packages, as well as open region radiation and scattering problems. We begin by observing that there is a rapidly growing trend in computational electromagnetics...
Graphical processing units (GPU) has been recently used for the implementation of the FDTD method for electromagnetics. These processors, found inside graphics cards, are able to execute numerical calculations at speeds many times faster than that of modern CPUpsilas. Such speed gains allow for many common FDTD simulations to be performed in as little as a few seconds for simple, but practical problems...
The second-order accurate FDTD technique at the dielectric interface is applied into the subgridding method. The second-order accuracy of the tangential electric fields at the interface can be implemented and the accuracy of the subgridding algorithm is improved. Numerical simulations of dielectric resonators are carried out and the better accuracy is shown in the proposed method than the standard...
Electromagnetic wave propagation in dispersive media can be modeled conveniently using the finite-difference time-domain (FDTD) method in conjunction with the impulse invariance method of Z-transform theory. However, the classical impulse invariance method has been found to be incorrect and inaccurate when the impulse response is discontinuous at the initial time t = 0 . A corrected impulse invariance...
In this paper, we prove the unconditional stability of the three-dimensional locally one dimensional finite difference time domain (LOD-FDTD) method analytically for the first time. It is shown that the three-dimensional LOD-FDTD method is unconditionally stable. Numerical results are also presented to show the unconditional stability of the method.
A modified conformal technique for fourth-order finite-difference time-domain (FDTD (2, 4)) is proposed. This conformal scheme has higher-order accuracy than that of conventional FDTD and FDTD (2, 4) methods, which are caused by staircasing errors when modeling curved metallic objects. Two integration loops of Faradaypsilas law for the updating of magnetic field components are introduced here. Numerical...
This paper presents an unconditionally stable split-step finite-difference time-domain (SS-FDTD) method with 4th order accuracy in time. Analytical proof of its unconditional stability is provided and numerical dispersion results are shown. Compared to the 2nd order SS-FDTD, the 4th order SS-FDTD yields a lower phase velocity error. Compared further to the 2nd order SS-FDTD with three iterations (for...
Simulation and modelling using FDTD-PIC techniques requires the treatment and utilization of various electromagnetic media properties to provide high fidelity results. The various techniques available have practical limitations when employed in problems that include the modeling of ambient plasmas. The authors discuss some of the techniques and issues that must be overcome in obtaining robust simulations...
A stable scheme of the time domain integral equation (TDIE) methods for transient scattering problems by 3D composite metallic and dielectric objects is developed The formulations are deducted by using induced equivalent surface polarization and magnetization as unknown quantities. The time domain electric field integral equation is adopted for conducting part, while the time domain Piggio-Miller-Chang-Harrington-Wu...
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