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    • 7. 发明授权
    • Swarm intelligence for electrical design space modeling and optimization
    • 用于电气设计空间建模和优化的群体智能
    • US08276106B2
    • 2012-09-25
    • US12398535
    • 2009-03-05
    • Moises CasesJinwoo ChoiBhyrav MutnuryNavraj SinghCaleb J. Wesley
    • Moises CasesJinwoo ChoiBhyrav MutnuryNavraj SinghCaleb J. Wesley
    • G06F17/50G06G7/48
    • G06F17/5045G06F2217/08
    • A method, system, and computer program product for exploring and optimizing an electrical design space. A computer receiving a design space assigns a plurality of initial values (random or predetermined) for optimizing the design space. A particle swarm containing a plurality of particles is created and an optimization of the design space is then performed using the assigned initial values. Following completion of optimization, the global best and personal best for each particle are updated. Velocity vectors and position vectors of the design space are then updated before the computer performs the optimization process again. The process loops, continually updating global and personal bests and velocity and position vectors until a termination criteria is reached. Upon reaching the termination criteria, the best fitness of each particle of the swarm is assigned as an optimized design space. In an alternate embodiment, the particle with the worst target fitness may be assigned.
    • 一种用于探索和优化电气设计空间的方法,系统和计算机程序产品。 接收设计空间的计算机分配用于优化设计空间的多个初始值(随机或预定)。 产生包含多个粒子的粒子群,然后使用分配的初始值来执行设计空间的优化。 在优化完成后,更新每个粒子的全球最佳和个人最好的。 然后在计算机再次执行优化处理之前更新设计空间的速度向量和位置向量。 过程循环,持续更新全局和个人最佳状态以及速度和位置向量,直到达到终止标准。 达到终止标准后,群体的每个粒子的最佳适应度被指定为优化的设计空间。 在替代实施例中,可以分配具有最差目标适应度的粒子。
    • 9. 发明授权
    • Method for ultimate noise isolation in high-speed digital systems on packages and printed circuit boards (PCBS)
    • 封装和印刷电路板(PCBS)上高速数字系统中极限噪声隔离的方法
    • US07839654B2
    • 2010-11-23
    • US11679951
    • 2007-02-28
    • Jinwoo Choi
    • Jinwoo Choi
    • H05K1/11
    • H05K1/0236H01Q15/006H05K1/167H05K3/4641H05K2201/09309H05K2201/09681
    • Improved noise isolation for high-speed digital systems on packages and printed circuit boards is provided by the use of mixed alternating impedance electromagnetic bandgap (AI-EBG) structures and a power island configured to provide ultimate noise isolation. A power island is surrounded by a plurality of mixed AI-EBG structures to provide a power distribution network. In this structure, the gap around the power island provides excellent isolation from DC to the first cavity resonant frequency which is determined by the size of the structure and dielectric material. One AI-EBG structure provides excellent isolation from the first cavity resonant frequency of around 1.5 GHz to 5 GHz. The other AI-EBG structure provides excellent noise isolation from 5 GHz to 10 GHz. Through use of this novel configuration of AI-EBG structures, a combination effect of the hybrid AI-EBG structure provides excellent isolation far in excess of 10 GHz. The AI-EBG structure is a metallic-dielectric EBG structure that comprises two metal layers separated by a thin dielectric material (similar to power/ground planes in packages and PCBs). However, in the AI-EBG structure, only one of the metal layers has a periodic pattern which is preferably a two-dimensional rectangular lattice with each element consisting of a metal patch with four connecting metal branches.
    • 通过使用混合交替阻抗电磁带隙(AI-EBG)结构和配置为提供最佳噪声隔离的功率岛,提供了封装和印刷电路板上高速数字系统的改进的噪声隔离。 功率岛由多个混合的AI-EBG结构包围以提供配电网络。 在这种结构中,功率岛周围的间隙提供了从DC到第一腔谐振频率的良好隔离,该谐振频率由结构和介电材料的尺寸决定。 一个AI-EBG结构提供了与大约1.5GHz至5GHz的第一腔共振频率的良好隔离。 其他AI-EBG结构提供了从5 GHz到10 GHz的出色的噪声隔离。 通过使用这种新颖的AI-EBG结构,混合AI-EBG结构的组合效果提供了超过10GHz的极好隔离。 AI-EBG结构是金属电介质EBG结构,其包括由薄的介电材料隔开的两个金属层(类似于封装和PCB中的电源/接地层)。 然而,在AI-EBG结构中,只有一个金属层具有周期性图案,其优选地是二维矩形格子,每个元件由具有四个连接金属分支的金属贴片组成。