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Evaluation of Emission from a PCB by Using Crosstalk between a Low Frequency Signal Trace and a Digital Signal Trace

By Evaluationof Emissionfis, Chiharu MIYAZAKI, Shuichi NITTA and Naoto Oka

Abstract

this paper, evaluation ofemission from a PCB byusin crosstalk between a lowfrequen1 signg tracean a digitalsigna trace isin vestigated. The traces are closely routedin parallel to each otheron the di#eren t severalsign0 plan0 in the PCB. It is shown experimen tally that the coupledsigne trace with a cablesection causes drastic instic# ofemission from the digital PCB. Maximum level of the experimen tal model of PCB with thecouplin an the cablesection is 20 dB higherthan the PCB without thesesection5 From thein vestigation ofcurren tdistribution on the cablesection it is shown that thiscurren tdistribution con tributes to thein#0--'-- ofemission from the PCB. Therefore,emission insione, bycouplin between sign

Year: 2000
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