差分信号是一种抗干扰能力强、适合长距离传输的信号传输方式，广泛应用于RS-485、USB、以太网、CAN总线、LVDS等通信标准中。1.差分信号的基本原理差分信号使用两根导线（A和B）传输数据，通过两根线之间的电压差来表示逻辑1和0：oA-B>+Vth（如+200mV）→逻辑1oA-B<-Vth（如-200mV）→逻辑0oA≈B（接近0V）→无信号或总线空闲示例：逻辑状态A线电压B线电压差分电压(A-B)逻辑1+3.3V+1.3V+2V逻辑0+1.3V+3.3V-2V空闲+2.3V+2.3V0V2....
ElementaryDifferentialGeometryRevisedSecondEditionElementaryDifferentialGeometryRevisedSecondEdition▼▲BarrettO’NeillDepartmentofMathematicsUniversityofCalifornia,LosAngelesAMSTERDAM•BOSTON•HEIDELBERGLONDON•NEWYORKOXFORD•PARISSANDIEGO•SANFRANCISCOSINGAPORE•SYDNEY•TOKYOAnimprintofElsevierAcquisitionsEditor:PamelaChesterProjectManager:HeatherFurrowEditorialAssistant:KellyWeaverMarketingM...
ASurveyonDifferentialGeometryThitiwanSrinark,Ph.D.ComputerEngineeringDepartmentFacultyofEngineering,KasetsartUniversityAbstractInthispaper,wesurveythebasicDifferentialge-ometryofsurfaceswhichincludeshapeoperator,firstfundamentalform,secondfundamentalformandcurvatures.Wealsodemonstratehowsomesignificantequationsarederived.Weexplainvari-ouspracticaltechniquesforcurvatureestimationondifferentsurfa...
