标签: units

摘要：高度集成的78M6612的电能计量SoC最大限度地减少了外部元件数量和降低印刷电路板（PCB）布局设计的复杂性。本应用笔记讨论了一些设计问题，优化了测量精度和可靠性。78M6612PrintedCircuitBoardLayoutGuidelinesAMaximIntegratedProductsBrandAPPLICATIONNOTEAN_6612_025March2010IntroductionThehighlyintegrated78M6612SOCminimizestheexternalcomponentcountandreducesthecomplexityoftheprintedcircuitboardlayoutdesign.However,somedesignissuesrequireconsiderationforoptimummeasurementaccuracyandreliability.Thisapplicationnotediscus……

High-SpeedVLSIArithmeticUni...,High-SpeedVLSIArithmeticUnitsAddersandMultipliers……

NSK_CrystalUnits_TermsandDefinitionsCrystalUnits:TermsandDefinitionsThepiezoelectriceffectsisdefinedthatpressureappliedonquartzcrystalgeneratesvoltageandvoltageappliedacrossacrystalquartzproducesmechanicalvibration.Thefrequencyofthesevibrationisdeterminedbyseveralfactors:a)Thephysicaldimensionsofthepieceofquartzcrystalwafer.b)Theplaneorcutofthepieceinrelationtothecrystallineaxesofthequartz.c)Theambienttemperature.d)Theoperatingcircuit.1.EquivalentCircuitAlthoughthetheoreticalanalysisofthispiezoelectriceffectisarelativelycomplexelectro-mechanicalfunction,itcanbeshownasasimpleequivalentcircuit.||[pic]|Theequivalentcrystalcircuitisusefulinexplainingtheelectrical……