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Proceedings ArticleDOI

Minimizing core supply noise in a power delivery network by optimization of decoupling capacitors using simulated annealing

TL;DR: In this paper, an optimal decoupling network is designed by Simulated Annealing to reduce the power supply noise in power delivery networks, which reduces the cumulative impedance of power delivery network.
Abstract: An efficient methodology for minimizing core supply noise in Power Delivery Networks is presented. To reduce the power supply noise, an optimal decoupling network is designed by Simulated Annealing. The cumulative impedance of Power Delivery Network is reduced using lesser number of decoupling capacitors compared to placing decoupling capacitors intuitively. The supply noise is minimized according to the requirement of system specifications and the corresponding jitter reduction is reported.
Citations
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Journal ArticleDOI
TL;DR: A genetic algorithm (GA)-based method is proposed for simultaneous optimization of decoupling capacitors assigned to multiple pins of a ball-grid array (BGA) package on a printed circuit board and a noise susceptibility parameter is introduced as the basis of a new set of GA fitness functions.
Abstract: A genetic algorithm (GA)-based method is proposed for simultaneous optimization of decoupling capacitors assigned to multiple pins of a ball-grid array (BGA) package on a printed circuit board. A noise susceptibility parameter is introduced as the basis of a new set of GA fitness functions. Performance of several fitness functions is comparatively tested and discussed in case studies. The accuracy of the developed expressions is tested against full-wave electromagnetic simulation results. The proposed method is particularly useful for predicting the number and placement of decoupling capacitors under the BGA area of integrated circuit devices in early design stages and serves as a complement to rigorous algorithms that are used in the final phase of the design.

27 citations

Journal ArticleDOI
TL;DR: The proposed approach provides options for designers to meet power integrity specifications by employing uniform-valued capacitors that help to reduce the bill-of-material (BOM) cost and mitigate the part procurement risk.
Abstract: A multiobjective evolutionary method is proposed for the optimization of surface mount device (SMD) multilayer ceramic chip (MLCC) capacitors used for decoupling on printed circuit boards (PCBs) with resonant power–ground plane pairs. The proposed approach provides options for designers to meet power integrity specifications by employing uniform-valued capacitors that help to reduce the bill-of-material (BOM) cost and mitigate the part procurement risk. It is also shown that uniform MLCC capacitors with variable distance from power pins can have a similar decoupling effect to an assortment of capacitors. By simultaneously optimizing the pin-capacitor distance and value, the proposed method is shown to allow for the allocation of fewer decoupling capacitors under the ball-grid-array (BGA) pin field of an integrated circuit (IC) device.

20 citations

Proceedings ArticleDOI
01 Nov 2017
TL;DR: In this paper, a fuzzy neural network (FNN) was used to identify Jatropha Curcas Disease and simulated annealing (SA) was employed to adjust the boundary of membership functions of the FNN.
Abstract: Jatropha curcas is an important commodity for farmers. The farmers must be aware of the disease caused by pest or virus for the existence and benefits of this plant. The main obstacle is the lack of farmers' knowledge about diseases and a system that utilize plant expert knowledge is needed. This paper proposes Fuzzy Neural Network (FNN) method to identify Jatropha Curcas Disease. To achieve higher accuracy, simulated annealing (SA) is employed to adjust the boundary of membership functions of the FNN. Computational experiments prove that the proposed method produces promising result and the SA is effective to improve the accuracy of the FNS.

8 citations


Cites result from "Minimizing core supply noise in a p..."

  • ...Some optimization processes using simulated annealing [34], [35] mostly produce more optimal results than previous results....

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Proceedings ArticleDOI
14 Dec 2020
TL;DR: A Newton-Raphson (N-R) based method is developed for performance evaluation of power delivery networks with arbitrarily shaped parallel-plate power/ground plane pairs and the results are observed in good agreement with those obtained from a numerical electromagnetic (EM) simulator.
Abstract: A Newton-Raphson (N-R) based method is developed for performance evaluation of power delivery networks (PDN) with arbitrarily shaped parallel-plate power/ground plane pairs. The proposed method allows for PI assessment in a few iteration steps while providing significant computational efficiency compared to alternative methods. The proposed method is tested on a practical example and the results are observed in good agreement with those obtained from a numerical electromagnetic (EM) simulator.

3 citations

Journal Article
TL;DR: In this paper, the voltage division factor, isolation factor and impedance under SMPS side of artificial mains network have been studied based on high frequency parasitic parameters to analyze the conducted emission (CE) measurement uncertainty.
Abstract: The switch mode power supply (SMPS) have been widely used in the electrical and electronics systems for AC-DC and DC-DC power conversion, which can generate a lot of electromagnetic interference (EMI), especially conducted emission (CE) from 9kHz to 30MHz. The traditional CE models and mechanisms have been present for three line systems, including live, neutral and ground lines, while a novel CE models and mechanisms have been proposed in the paper for two line SMPS. And the voltage division factor, isolation factor and impedance under SMPS side of artificial mains network have been studied based on high frequency parasitic parameters to analyze the CE measurement uncertainty. Moreover, three methods have been designed to reduce the CE of SMPS, such as the capacitor shunt between the source and drain electrodes of MOSFET, CM choke and crosstalk choke, and the capacitors matrix. The experiment results show that the CE of the power concentrator and colonoscopy can be suppressed well and pass EN 55022 class B, thus realize the proposed approaches good validation.

2 citations

References
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Book
06 Jul 2010
TL;DR: The author highlights key concepts and techniques for the successful application of commonly-used metaheuristc algorithms, including simulated annealing, particle swarm optimization, harmony search, and genetic algorithms.
Abstract: An accessible introduction to metaheuristics and optimization, featuring powerful and modern algorithms for application across engineering and the sciences From engineering and computer science to economics and management science, optimization is a core component for problem solving. Highlighting the latest developments that have evolved in recent years, Engineering Optimization: An Introduction with Metaheuristic Applications outlines popular metaheuristic algorithms and equips readers with the skills needed to apply these techniques to their own optimization problems. With insightful examples from various fields of study, the author highlights key concepts and techniques for the successful application of commonly-used metaheuristc algorithms, including simulated annealing, particle swarm optimization, harmony search, and genetic algorithms. The author introduces all major metaheuristic algorithms and their applications in optimization through a presentation that is organized into three succinct parts: Foundations of Optimization and Algorithms provides a brief introduction to the underlying nature of optimization and the common approaches to optimization problems, random number generation, the Monte Carlo method, and the Markov chain Monte Carlo method Metaheuristic Algorithms presents common metaheuristic algorithms in detail, including genetic algorithms, simulated annealing, ant algorithms, bee algorithms, particle swarm optimization, firefly algorithms, and harmony search Applications outlines a wide range of applications that use metaheuristic algorithms to solve challenging optimization problems with detailed implementation while also introducing various modifications used for multi-objective optimization Throughout the book, the author presents worked-out examples and real-world applications that illustrate the modern relevance of the topic. A detailed appendix features important and popular algorithms using MATLAB and Octave software packages, and a related FTP site houses MATLAB code and programs for easy implementation of the discussed techniques. In addition, references to the current literature enable readers to investigate individual algorithms and methods in greater detail. Engineering Optimization: An Introduction with Metaheuristic Applications is an excellent book for courses on optimization and computer simulation at the upper-undergraduate and graduate levels. It is also a valuable reference for researchers and practitioners working in the fields of mathematics, engineering, computer science, operations research, and management science who use metaheuristic algorithms to solve problems in their everyday work.

1,286 citations


"Minimizing core supply noise in a p..." refers methods in this paper

  • ...Simulated Annealing (SA) is a metaheuristic optimization technique based on random search method [10][11]....

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  • ...The advantage of Simulated Annealing over other metaheuristic techniques is that it avoids being trapped in a local minima by using random selection of solution using a probability parameter [10]....

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Book
19 Nov 2007
TL;DR: This book's system-level focus and practical examples will make it indispensable for every student and professional concerned with power integrity, including electrical engineers, system designers, signal integrity engineers, and materials scientists.
Abstract: The First Comprehensive, Example-Rich Guide to Power Integrity ModelingProfessionals such as signal integrity engineers, package designers, and system architects need to thoroughly understand signal and power integrity issues in order to successfully design packages and boards for high speed systems Now, for the first time, there's a complete guide to power integrity modeling: everything you need to know, from the basics through the state of the artUsing realistic case studies and downloadable software examples, two leading experts demonstrate today's best techniques for designing and modeling interconnects to efficiently distribute power and minimize noiseThe authors carefully introduce the core concepts of power distribution design, systematically present and compare leading techniques for modeling noise, and link these techniques to specific applications Their many examples range from the simplest (using analytical equations to compute power supply noise) through complex system-level applicationsThe authors Introduce power delivery network components, analysis, high-frequency measurement, and modeling requirements Thoroughly explain modeling of power/ground planes, including plane behavior, lumped modeling, distributed circuit-based approaches, and much more Offer in-depth coverage of simultaneous switching noise, including modeling for return currents using time- and frequency-domain analysis Introduce several leading time-domain simulation methods, such as macromodeling, and discuss their advantages and disadvantages Present the application of the modeling methods on several advanced case studies that include high-speed servers, high-speed differential signaling, chip package analysis, materials characterization, embedded decoupling capacitors, and electromagnetic bandgap structures This book's system-level focus and practical examples will make it indispensable for every student and professional concerned with power integrity, including electrical engineers, system designers, signal integrity engineers, and materials scientists It will also be valuable to developers building software that helps to analyze high-speed systems

271 citations


Additional excerpts

  • ...Using decoupling capacitors to reduce the impedance of the PDN in a range of frequencies, is a very common practice in industry for designing PDNs [1][2]....

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Journal ArticleDOI
TL;DR: It is shown that impedance metric leads to large overdesign and then a noise-driven optimization algorithm for decoupling capacitors in packages for power integrity is developed and reduced by 3times and more than 10times faster even with explicit noise computation.
Abstract: With high integration density of today's electronic system and reduced noise margins, maintaining high power integrity becomes more challenging for high performance design. Inserting decoupling capacitors is one important and effective solution to improve the power integrity. The existing decoupling capacitor optimization approaches meet constraints on input impedance. In this paper, we show that impedance metric leads to large overdesign and then develop a noise-driven optimization algorithm for decoupling capacitors in packages for power integrity. We use the simulated annealing algorithm to minimize the total cost of decoupling capacitors under the constraints of a worst case noise bound. The key enabler for efficient optimization is an incremental worst case noise computation based on fast Fourier transform over incremental impedance matrix evaluation. Compared to the existing impedance-based approaches, our algorithm reduces the decoupling capacitor cost by 3times and is also more than 10times faster even with explicit noise computation

47 citations

Journal ArticleDOI
TL;DR: In this article, the authors proposed a GA to find the decoupling capacitors for suppressing the cavity-mode resonances in the printed circuit board power-bus structure, where the optimal positions and circuital values of decoupled capacitors are efficiently determined to selectively mitigate specific resonance peaks.
Abstract: The genetic algorithm (GA) is suggested to find the decoupling capacitors for suppressing the cavity-mode resonances in the printed circuit board power-bus structure. The optimal positions and circuital values of decoupling capacitors are efficiently determined to selectively mitigate specific resonance peaks. The optimization of the damping is validated with the measurement and develops to multiresonance modes' damping.

41 citations

Journal ArticleDOI
TL;DR: In this paper, the optimal placement of decoupling capacitors in suppressing the input and transfer impedances of power-ground planes was investigated in high-speed digital printed circuit boards.
Abstract: In the high-speed digital printed circuit board, decoupling capacitors play an important role in lowering the power-ground planes impedance leading to the ground bounce noise in I/O ports while the logic is in transition. This paper investigates the optimal placement of decoupling capacitors in suppressing the input and transfer impedances of power-ground planes. The cavity model combines with genetic algorithm (GA) here to find the design specification and the optimal placement of the decoupling capacitors.

31 citations