理解共模信号

解共模信号如何创建，然后镇压，首先应了解的盾牌和理由相互作用的共同电缆配置。下面的讨论中定义的共模信号，审查了常见的电缆配置，认为屏蔽与非屏蔽电缆，并描述了典型的接地做法。这篇文章讨论的方法，使创建和拒绝共模信号的。Maxim/Dallas>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSAUDIOCIRCUITSCOMMUNICATIONSCIRCUITSINTERFACECIRCUITSVIDEOCIRCUITSKeywords:common-modesignals,network,transmissionlines,shieldedcables,unshieldedcables,RS-485,May21,2003RS485,RS-422,RS422,APPLICATIONNOTE2045UnderstandingCommon-ModeSignalsAbstract:Tounderstandhowcommon-modesignalsarecreatedandthensuppressed,youshouldfirstunderstandtheinteractionofshieldsandgroundsincommoncableconfigurations.Thefollowingdiscussiondefinesacommon-modesignal,reviewsthecommoncableconfigurations,considersshieldedvs.unshieldedcables,anddescribestypicalgroundingpractices.Thearticlediscussesmethodswherebycommon-modesignalsarecreatedandrejected.Theprimaryfocus