标签: positive

NCP349-DPositiveOvervoltageProtectionCircuitwithInternalLowRonNMOSFET

LTC4151是一款易于使用、功能丰富的功率监控芯片，适于在汽车、电信、工业等多领域应用。通过一个简单的I2C接口，它可提供对正电压轨从7V到80V范围的准确的电压和电流监控。OneDeviceReplacesBatteryCharger,PushbuttonController,LEDDriverandVoltageRegulatorICsinPortableElectronicsDesignNote470MartyMerchantIntroductionStatusoutputindicateswhenthepushbuttonisdepressed,TheLTC3577/LTC3577-1integratesanumberofportableallowingthemicroprocessortoalteroperationorbegindevicepowermanagementfunctionsintooneIC,reducingthepower-downsequence.Holdingthepushbuttondowncomplexity,costandboardareainhandhelddevices.Theforvesecondsproducesahardreset.Thehardresetmajorfunctionsinclude:shutsdownthethreebucks,thetwoLDOsandtheLEDdriver,allowi……

Abstract:Thisdesignideadescribesasimplecircuittogenerateaprogrammablenegativecontrolvoltage.Ittakestheoutputofasinglesupplydigital-to-analogconverter(DAC)andproducesavariablenegativevoltage.TheDACoutputfrom0Vto+2.5Visconvertedto0Vto-5Vattheoutput.Maxim>AppNotes>A/DandD/ACONVERSION/SAMPLINGCIRCUITSAMPLIFIERANDCOMPARATORCIRCUITSSIGNALGENERATIONCIRCUITSKeywords:DACs,singlesupplyDAC,variablenegativecontrolvoltage,programmablenegativevoltage,May24,2002positivetonegativevoltagetranslator,digitalanalogconverter,digitaltoanalogconvertersAPPLICATIONNOTE1074DACandOpAmpGenerateVariableNegativeControlVoltageAbstract:Thisdesignideadescribesasimplecircuittogenerateaprogrammablenegativecontrolvoltage.Ittakestheoutputofasinglesupplydigital-to-analogconverter(DAC)andproducesavariablenegativevoltage.TheDACoutputfrom0Vto+2.5Visconvertedto0Vto-5Vattheoutput.Earlydigital-to-analogconverters(DACs)weredesignedwithstandardR-2Rladders,a……

Abstract:ThefollowingapplicationnoteshowsacircuitthatconvertstheloadcurrentofapositivepowersupplyintoagroundreferencedsignalvoltageusingtheICL7612operationalamplifier.Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSKeywords:positivesupplycurrent,monitoring,loadcurrent,powersupply,opamp,operationalamplifiers,opJul09,1998ampsAPPLICATIONNOTE69MicropowerCircuitMonitorsPositiveSupplyCurrentAbstract:ThefollowingapplicationnoteshowsacircuitthatconvertstheloadcurrentofapositivepowersupplyintoagroundreferencedsignalvoltageusingtheICL7612operationalamplifier.TheinexpensivecircuitofFigure1convertstheloadcurrentofapositivepowersupplytoaground-referencedsignalvoltage,withoutrecoursetotheinstrumentationamplifier,extrapowersupply,andmatchedsetsofresistorstypicalofsuchcircuits.TheoutputcurrentIO(proportionaltosupplycurrent)flowsthroughROtoproduceVO.Be……

Abstract:Thisapplicationnoteintroduceshowacontinuouspositiveairwaypressure(CPAP)ventilationsystemoperates.ThemainsubfunctionsofCPAPrespiratoryventilationincludeair-hose-environmentsensing,compressormotor-drivefeedback,motor-driveexcitation,andacommunicationinterfacetoatechnician/doctor.Thesesubfunctionsareexplainedandafunctionalblockdiagramshowingsystemcomponentsisalsodetailed.Maxim>Designsupport>Appnotes>A/DandD/AConversion/SamplingCircuits>APP4685Maxim>Designsupport>Appnotes>AmplifierandComparatorCircuits>APP4685Maxim>Designsupport>Appnotes>Sensors>APP4685Keywords:cpap,continuouspositiveairwaypressure,blockdiagram,electricalcomponents,respiratoryventilationMay10,2010APPLICATIONNOTE4685HowContinuousPositiveAirwayPressure(CPAP)RespiratoryVentilationSystemsFunctionBy:JohnGossonAbstract:Thisapplicationnoteintroduceshowacontinuouspositiveairwaypressure(CPAP)ventilationsystemoperates.ThemainsubfunctionsofCPAPrespiratoryventilationincludeair-hose-environm……

摘要：本应用笔记介绍了连续气道正压通气（CPAP）通风系统如何运作。CPAP呼吸通风的主要子函数包括空调软管环境遥感，压缩机电机驱动的反馈，电机驱动激发，技术员/医生和通信接口。这些子函数还详细解释和显示系统组件的功能框图。Maxim>Designsupport>Appnotes>A/DandD/AConversion/SamplingCircuits>APP4685Maxim>Designsupport>Appnotes>AmplifierandComparatorCircuits>APP4685Maxim>Designsupport>Appnotes>Sensors>APP4685Keywords:cpap,continuouspositiveairwaypressure,blockdiagram,electricalcomponents,respiratoryventilationMay10,2010APPLICATIONNOTE4685HowContinuousPositiveAirwayPressure(CPAP)RespiratoryVentilationSystemsFunctionBy:JohnGossonAbstract:Thisapplicationnoteintroduceshowacontinuouspositiveairwaypressure(CPAP)ventilationsystemoperates.ThemainsubfunctionsofCPAPrespiratoryventilationincludeair-hose-environm……

摘要：这样的设计理念，描述了一个简单的电路产生负可编程控制电压。它采用单电源数字-模拟转换器（DAC）的输出，并产生一个可变的负电压。DAC的输出从0V至+2.5V转换为0V至5V输出。Maxim>AppNotes>A/DandD/ACONVERSION/SAMPLINGCIRCUITSAMPLIFIERANDCOMPARATORCIRCUITSSIGNALGENERATIONCIRCUITSKeywords:DACs,singlesupplyDAC,variablenegativecontrolvoltage,programmablenegativevoltage,May24,2002positivetonegativevoltagetranslator,digitalanalogconverter,digitaltoanalogconvertersAPPLICATIONNOTE1074DACandOpAmpGenerateVariableNegativeControlVoltageAbstract:Thisdesignideadescribesasimplecircuittogenerateaprogrammablenegativecontrolvoltage.Ittakestheoutputofasinglesupplydigital-to-analogconverter(DAC)andproducesavariablenegativevoltage.TheDACoutputfrom0Vto+2.5Visconvertedto0Vto-5Vattheoutput.Earlydigital-to-analogconverters(DACs)weredesignedwithstandardR-2Rladders,a……

Allegro_negative&positiveGraserTechnologyJackyJinAllegro中正负片的概念及相关设置概念：正片和负片是底片的两种不同类型。正片：简单地说就是，在底片上看到什么就有什么。负片：正好相反，看到的就是没有的，看不到的就是有的。见下图：在Allegro中使用正负片的特点：正片：优点是所见所的，有比较完善的DRC检查。它的缺点是如果移动零件（一般指DIP的）或贯孔,铜箔需重铺或者重新连结，否则就会短路或开路。另外，如果包含大量铜箔又用274D格式出底片是数据量会很大。负片：正好克服正片移动零件或贯孔时需要重铺铜箔的缺点，过孔贯穿负片层时程序根据网络连接判断采用(ThermalRelief)与该层连接还是用(Anti-Pad)与该层隔开。它的缺点是DRCCheck并没有做的很完整，对于被Anti-Pad隔断的内层没有DRC报错。Pin>TopThermalReliefAntipadPin>Bottom一个过孔的铺面图以上资料有Jacky提供，如有疑问请与我联系：jacky_jin@msn.com2003-8-25GraserTechnologyJackyJin在建焊盘时注意：下图红色方框中的设置都是针对负片而言的：ThermalRelief：和内层导通所用的图形，一般用Flash见下图：Anti-Pad：与内层隔开所用的图形，一般用大于钻孔一定数量的圆形就可以了。以上资料有Jacky提供，如有疑问请与我联系：jacky_jin@msn.com2003-8-25……