电子设计工程
電子設計工程
전자설계공정
ELECTRONIC DESIGN ENGINEERING
2011年
15期
160-162,166
,共4页
PCB%差模电流%共模电流%小环天线%偶极天线
PCB%差模電流%共模電流%小環天線%偶極天線
PCB%차모전류%공모전류%소배천선%우겁천선
PCB%differential mode current%common mode current%small loop antenna%dipole antenna
随着数字产品的时钟频率越来越高,信号上升时间（下降时间）越来越短,PCB的RE越来越严重,已逐步成为影响产品EMC性能的重要因素之一,PCB设计过程中必须采取综合措施抑制RE。从高速高密度PCB设计的角度,总结了PCB级RE的主要来源,分析了PCB级RE的基本规律,给出了PCB级RE的抑制对策。讨论与结论对高速高密度PCB设计实践具有参考作用。
隨著數字產品的時鐘頻率越來越高,信號上升時間（下降時間）越來越短,PCB的RE越來越嚴重,已逐步成為影響產品EMC性能的重要因素之一,PCB設計過程中必鬚採取綜閤措施抑製RE。從高速高密度PCB設計的角度,總結瞭PCB級RE的主要來源,分析瞭PCB級RE的基本規律,給齣瞭PCB級RE的抑製對策。討論與結論對高速高密度PCB設計實踐具有參攷作用。
수착수자산품적시종빈솔월래월고,신호상승시간（하강시간）월래월단,PCB적RE월래월엄중,이축보성위영향산품EMC성능적중요인소지일,PCB설계과정중필수채취종합조시억제RE。종고속고밀도PCB설계적각도,총결료PCB급RE적주요래원,분석료PCB급RE적기본규률,급출료PCB급RE적억제대책。토론여결론대고속고밀도PCB설계실천구유삼고작용。
RE（radiated emission） in high-speed and high-density PCBs is becoming more and more important for modern digital products.The RE has key impacts on EMC（electromagnetic compatibility） of the products and it＇s critically important to fix the RE problems in high-speed and high-density PCB designs.On the purpose of high-speed and high-density PCB designs and at the level of PCB,the main sources of the RE are outlined,the mechanisms and characteristics of the RE are analyzed,and the reduction techniques for the RE are characterized.The discussions and conclusions are useful for guiding the high-speed and high-density PCB design practices.
