标签: termination

TheH.264videocodingstandardprovidesconsiderablyhighercodingefficiencythanpreviousstandardsdo,whereasitscomplexityissignificantlyincreasedatthesametime.InanH.264encoder,themosttime-consumingcomponentisvariableblock-sizemotionestimation.Toreducethecomplexityofmotionestimation,anearlyterminationalgorithmisproposedinthispaper.Itpredictsthebestmotionvectorbyexaminingonlyonesearchpoint.Withtheproposedmethod,someofthemotionsearchescanbestoppedearly,andthenalargenumberofsearchpointscanbeskipped.Theproposedmethodcanworkwithanyfastmotionestimationalgorithm.ExperimentsarecarriedoutwithafastmotionestimationalgorithmthathasbeenadoptedbyH.264.Resultsshowthatsignificantcomplexityreductionisachievedwhilethedegradationinvideoqualityisnegligible.……

LTC3717DDR终端电源可提供高效、快速负载瞬态响应。如果电源小于5V，LTC3718可被采用。LTC3718为5VMOSFET门极电源集成了LTC3717的1.2MHz升压稳压控制器。如果输入电压在3.3V至8V之间，则可采用LTC3831电压模式同步升压跟踪控制器。advertisementWideInputRange,HighEfficiencyDDRTerminationPowerSupplyAchievesFastTransientResponse……

reducedterminationlossbyactivesynthesisofoutputimpedance……

Inhigh-speedtransmission-lineapplications,itisimportanttomatchtheoutputimpedanceofalinedrivertotheline.Whilethisisachievedusuallywitharesistor,anactiveimpedancesynthesishasadvantages.Thisapplicationnotedescribeshowtousepositivefeedbackaroundanopamptocreatethedesiredoutputimpedance.Equationsandcircuitexamplesaregivenforlow-noiseaudio,andvideoopampsdriving50-to600-ohmloads.……

ProperTerminationofInputstotheHIP408xFamilyofDriverICsProperTerminationofInputstotheHIP408xFamilyofDriverICsTechnicalBriefFebruary2003TB406DescriptionSchematicTheHIP408xfamilyofdriverICsincludestheHIP4080A,HIP4081A,HIP4082,HIP4083andHIP4086.Theinputsto+Vallofthesedeviceshaveinternal100A(typical)pull-upstoVDD……

【应用笔记】在StratixIII器件中实现片上终端(on-chiptermination,OCT)校正(ImplementingOCTCalibrationinStratixIIIDevices)片上终端(on-chiptermination,OCT)方案在StratixIII器件中的使用，消除了外部串行或并行终端电阻的需要，简化了PCB设计。StratixIII器件在所有I/O块上对单端I/O标准，支持可校准的片上串行、并行和动态终端。eliminatestheneedforexternalseriesorparallelterminationresistorsandsimplifiesthedesignofaPCB.StratixIIIdevicessupportcalibratedon-chipseries,parallelanddynamicterminationinallI/Obanksforsingle-endedI/Ostandards.OCTcalibrationallowsyoutoestablishanoptimalterminationvaluethatcompensatesimpedancechangeduetotemperatureandvoltagefluctuation.YoucanenableStratixIIIdevicescalibrationbyuser-controlledsignalsduringdeviceoperationorbydefaultduringdeviceconfiguration.ImplementingOCTCalibrationinStratixIIIDevicesOctober2007,version1.0ApplicationNote465IntroductionUseoftheon-chiptermination(OCT)schemeinStratixIIIdeviceseliminatestheneedforexternalseriesorparallelterminationresistorsandsimplifiesthedesignofaPCB.StratixIIIdevicessupportcalibratedon-chipseries,parallelanddynamicterminationinallI/Obanksforsingle-ended……

【应用笔记】在StratixIi器件中使用校正的片上串行终端(UsingCalibratedOn-ChipSeriesTerminationinStratixIIDevices)片上串行终端(RsOCT)由于最佳的的阻抗匹配，提升了信号完整性和I/O性能。片上串行终端消除了外部串行电阻的需要，简化了PCB设计。On-chipseriestermination(RSOCT)improvessignalintegrityandI/Operformanceduetooptimizedimpedancematching.On-chipseriesterminationeliminatestheneedforexternalseriesterminationresistorsandsimplifiesthedesignofaprintedcircuitboard(PCB).UsingCalibratedOn-ChipSeriesTerminationinStratixIIDevicesApril2005,ver.1.0ApplicationNote384IntroductionOn-chipseriestermination(RSOCT)improvessignalintegrityandI/Operformanceduetooptimizedimpedancematching.On-chipseriesterminationeliminatestheneedforexternalseriesterminationresistorsandsimplifiesthedesignofaprintedcircuitboard(PCB).RSOCTisimplementedthroughoutputdriverim……

摘要：该电路包括电池充电器（MAX712）处理充电器的电源部分和降压开关稳压器（MAX5089）。通过控制稳压器为电池充电控制器MAX712的行为，生产为7V至16V的输出。从任何能够提供所需的快速充电电流，这种情况必须等于输出电压的总和（二加系列充电电池的数量）乘以1.7V的直流电源。Maxim>AppNotes>BatteryManagementPower-SupplyCircuitsKeywords:switchmodebatterychargers,NiMH/NiCdbatterychargers,stepdownregulators,constant-currentsupplies,dV/dtterminationAug09,2010APPLICATIONNOTE4496NiMH/NiCdSwitchmodeBatteryChargerHasdV/dtChargeTerminationAbstract:Thiscircuitincludesabatterycharger(MAX712)andstep-downswitchingregulator(MAX5089)forhandlingthepowerportionofthecharger.BycontrollingtheregulatortheMAX712actsasabattery-chargecontroller,producingoutputsof7Vto16V.ItoperatesfromanyDCsourcecapableofdeliveringthedesiredfast-chargecurrent,withthiscondition:theoutputvoltagemustequal1.7Vmultipliedbythesumof(twoplusthenumberofbatteriestobechargedinseries).Asimilarv……

【应用笔记】在Stratix和StratixGX器件中使用外部串行和并行终端(UsingExternalSeriesandParallelTerminationwithStratixandStratixGXDevices)本文档的目的是：指导你如何使用Stratix和StratixGX器件实现外部串行和并行终端。ThepurposeofthisdocumentistogiveyoudirectiononhowtoimplementexternalseriesandparallelterminationusingStratix™andStratix™GXdevices.Arepresentativeimplementationwith200MHz(400Mbps)doubledatarate(DDR)memoryDualIn-lineMemoryModule(DIMM)interfaceisdescribedindetailinthisdocument.Thedocumentprovidesschematics,correspondinglayout,signalintegritysimulationsandlabcorrelationforthesame.Arecommendationforsmallformfactorresistorpackswithbudgetarypricingisalsoprovided.UsingExternalSeriesandParallelTerminationwithStratixandStratixGXDevicesAN-336-1.0ApplicationNoteIntroductionThepurposeofthisdocumentistogiveyoudirectiononhowtoimplementexternalseriesandparallelterminationusingStratixandStratixGXdevices.Arepresentativeimplementationwith200MHz(400Mbps)doubledatarate(DDR)memoryDualIn-lineMemoryModule(DIMM)interfaceisdescribedindetailinthisdocument.Thedocumentprovidesschematics,correspondi……

摘要：由于能量/高功率密度，在锂离子（Li+）电池技术的重量和体积的关系，有一些挥之不去的安全问题时的电池充电和放电。虽然已经成熟的技术，改进锂电池操作正在进行中。本应用笔记介绍的一些改进。同时还介绍了各种充电控制计划，以确保细胞正常充电采用恒流，恒流恒压（CCCV）方法。几个说明单细胞和多细胞的Li+电池充电器充电电路的方法。Maxim>AppNotes>BATTERYMANAGEMENTKeywords:Battery,Li+,Lithium,Charging,Safety,ConstantCurrent,ConstantVoltage,CCCV,Chargingtermination,Dec17,2007Capacityfade,Protectionschemes,MAX1508,MAX1873,MAX1737APPLICATIONNOTE4169UnderstandingLi+BatteryOperationLessensChargingSafetyConcernsAbstract:Duetothehighenergy/powerdensity,inrelationtotheweightandvolumeofLithium-ion(Li+)batterytechnology,therearesomelingeringsafetyconcernswhencharginganddischargingthebatteries.Althoughanalreadymaturetechnology,improvementstoLi+batteryoperationareongoing.Thisapplicationnotedescribessomeofthoseimprovements.Italsopresentsvariouschargingcontrolschemestoensurethatthecellsareproperlychargedusingconstant-cur……

PowersupplysolutionforDDRbusterminationTexasInstrumentsIncorporatedPowerManagementPowersupplysolutionforDDRbusterminationByRobertKollman,SeniorApplicationsManager,PowerManagementJohnBetten,ApplicationsEngineer,PowerManagementandBangS.Lee,ApplicationSpecialist,PowerManagementIntroductionPowerdissipationinCMOSlogicsystemsisrelatedtotheclockfrequency,theinputcapacitanceofthevariousgateswithinthesystem,andthesupplyvoltage.Asdevicefeaturesizes,andhencesupplyvoltages,havebeenreduced,significantgainshavebeenmadeinloweringsystempowerdissipation.Reduceddissipationandhigheroperatingspeedsoftheselower-voltagedeviceshaveallowedsystemclockfrequenciestobepushedintothehundredsofmegahertz.Attheseveryhighclockfrequencies,clockdistri……

TerminationTechforHighSpeedBusesEDNDESIGNFEATURETerminationtechniquesforhigh-speedbusesKARTHIKETHIRAJANANDJOHNNEMEC,PHD,CALIFORNIAMICRODEVICEScontrollines;anincreaseinAsbusspeedscontinuetoclockandsignaljitter;andincrease,systemdesignersanincreaseintotalemismustseriouslyconsidertheChoosingtheproperbus-terminationsionsfromthepcboard.Anissuesofsignalpropagationtechnique―parallel,series,Thevenin,ac,oreffectivewaytoreducetheandquality.Concernspreviabovetransmission-lineouslyrelegatedtotheanalogdiode-based―iscriticaltodigital-systemeffectsistoproperlytermiworld,suchastransmissionperformance.Improperterminationcanleadnatetheselines.lineeffects,nowdeterminetoringingandstair-stepping,whichinturnCommonpassive-termiwhether……

LayoutandTerminationTechniquesinclockgeneratorfaxid:3612LayoutandTerminationTechniquesForCypressClockGeneratorsCypressSemiconductormakesavarietyofPLL-basedclockgenerators.ThisapplicationnoteprovidesasetofrecommendationstooptimizeusageofCypressclockdevicesinasystem.Theapplicationnotebeginswithrecommendedterminationtechniquesforclockgenerators.Subsequently,powersupplyfilteringandbypassingisdiscussed.Finally,theapplicationnoteprovidessomerecommendationsonboardlayout.Table1.LengthforVoltageReflectionstr(ns)222211110.50.50.50.5CD(pF)102040801020408010204080L(inches)4.734.323.743.052.161.871.531.180.930.760.590.44SummaryofTransmissionLineTheoryTypically,Cypressclockgeneratorshavelowoutputimpedances.Whenthesedev……