标签: negative

L7900AC_2%NEGATIVEVOLTAGEREGULATORS

Abstract:Thisarticledescribesasimpleandcosteffectivemethodofmeasuringtemperatureusingathermistorconnectedinahalf-bridgeconfiguration.ThegoalistoperformaratiometricmeasurementsuchthattheVREFsourcevoltagetothedivideristhesameasthereferencetotheanalog-to-digitalconverter(ADC)usedtomeasurethevoltageatVT.Maxim>AppNotes>A/DandD/ACONVERSION/SAMPLINGCIRCUITSKeywords:halfbridge,thermistor,ADC,A/Dconverter,NTC,PTC,ratiometric,negativetemperatureSep27,2002coefficent,positiontemperaturecoefficent,analogtodigitalconvertersAPPLICATIONNOTE1753ASimpleThermistorInterfacetoanADCAbstract:Thisarticledescribesasimpleandcosteffectivemethodofmeasuringtemperatureusingathermistorconnectedinahalf-bridgeconfiguration.ThegoalistoperformaratiometricmeasurementsuchthattheVREFsourcevoltagetothedivideristhesameasthereferencetotheanalog-to-digitalconverter(ADC)usedtomeasurethevoltageatVT.Therearemanycircuitsandmeasurementmethodsthatcanbeusedwithathermistortodeterminethetemperature.Thesimplesta……

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:Thisapplicationnoteusesahigh-sidecurrent-senseamplifiertomonitorthecurrentfromanegativesupplyvoltage.ThecircuitusestheIC'swidecommon-modeinputrangetoamplifyasmallVsensesignalatthenegativesupplyandlevelshiftituptoapositiveoutputvoltage.Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSBATTERYMANAGEMENTCIRCUITPROTECTIONMEASUREMENTCIRCUITSKeywords:currentsensor,negativesupply,currentsenseamplifier,negativecurrentmonitor,currentsenseMay11,2003amp,currentmonitorAPPLICATIONNOTE2011High-SidePositiveCurrentSensorMonitorsNegativeSupplyAbstract:Thisapplicationnoteusesahigh-sidecurrent-senseamplifiertomonitorthecurrentfromanegativesupplyvoltage.ThecircuitusestheIC'swidecommon-modeinputrangetoamplifyasmallVsensesignalatthenegativesupplyandlevelshiftituptoapositiveoutputvoltage.Alldedicatedcurrent-senseamplifiersaredesignedforhigh-sidesensingonapositivesupply,butyoucanadaptthemtomonitoranegativesupply(Figur……

Abstract:UsinganIC(MAX971)thatincludesanopen-draincomparatorandaprecision1%voltagereference,thiscircuitmonitorsthemagnitudeofanegativesupplyvoltageandprovidesadigitalwarningoffaultconditions.Tomonitormultiplenegativevoltages,usetheMAX974,whichincludesfourcomparators.Maxim>AppNotes>AmplifierandComparatorCircuitsMicroprocessorSupervisorCircuitsVoltageReferencesKeywords:negativesupplyvoltage,multi-railsystems,comparators,voltagereferencesDec07,2010APPLICATIONNOTE4543PrecisionCircuitMonitorsNegative-SupplyThresholdsBy:KevinBilkeAbstract:UsinganIC(MAX971)thatincludesanopen-draincomparatorandaprecision1%voltagereference,thiscircuitmonitorsthemagnitudeofanegativesupplyvoltageandprovidesadigitalwarningoffaultconditions.Tomonitormultiplenegativevoltages,usetheMAX974,whichincludesfourcomparators.AsimilarversionofthisarticleappearedintheFebruary8,2008issueofPortableDesignmagazine.Asimplebutac……

Abstract:Current-senseamplifiersnormallyoperatewellaboveground,butafaultconditioncandrivethesenseinputsbelowground,damagingthedevicebydrawingexcessivecurrentthroughtheESD-protectiondiodes.Thiscircuitprotectsaparticularhigh-sidecurrent-senseamplifier(MAX4080)byconnectingPMOSblockingtransistorsinserieswitheachinput.Maxim>Designsupport>Appnotes>AmplifierandComparatorCircuits>APP4837Maxim>Designsupport>Appnotes>CircuitProtection>APP4837Keywords:current-senseamplifiers,negativefaultvoltage,ESD-protectiondiodesFeb09,2011APPLICATIONNOTE4837ProtectCurrent-SenseAmplifiersfromNegativeOvervoltageBy:ArpitMehta,StrategicApplicationsEngineerPrashanthHolenarsipurAbstract:Current-senseamplifiersnormallyoperatewellaboveground,butafaultconditioncandrivethesenseinputsbelowground,damagingthedevicebydrawingexcessivecurrentthroughtheESD-protectiondiodes.Thiscircuitprotectsaparticularhigh-sidecurrent-sense……

：取消负载允许运算放大器的能力高输出电流，同时维持所有其他高精度规格，例如，获得了很高的开放环，低偏置的电压和电流、低偏移电压和电流的偏移量的噪音，低失真。Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSKeywords:negativeresistance,opamp,operationalamplifier,loadcanceling,open-loopgain,lowoffsetJan31,2003voltage,offsetcurrent,lowoffset-voltage,offset-currentnoise,lowdistortion,opampAPPLICATIONNOTE1868NegativeResistorCancelsOpAmpLoadAbstract:Cancelingtheloadallowstheopampthecapabilityforhighoutputcurrentwhilemaintainingalltheotherhigh-accuracyspecificationssuchasveryhighopen-loopgain,lowoffsetvoltageandcurrent,lowoffset-voltageandoffset-currentnoise,andlowdistortion.Accurateopampsareoftencharacterizedashavingveryhighopen-loopgain,lowoffsetvoltageandcurrent,lowoffset-voltageandoffset-currentnoise,andlowdistortion.Conspicuouslyabsen……

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……

摘要：本应用程序说明演示如何形成负降压开关稳压器从升压开关控制器、使用MAX1771，高效率、升压的直流-直流控制器在脉冲频率调制（PFM）模式下运行。Maxim>Designsupport>Appnotes>Automotive>APP945Maxim>Designsupport>Appnotes>Power-SupplyCircuits>APP945Keywords:stepdownregulator,PWM,PFM,negativestep-downregulator,DC-DC,dc-dcJan31,2002APPLICATIONNOTE945Step-UpControllerFormsNegativeStep-DownRegulatorAbstract:Thisapplicationnotedemonstrateshowtoformanegativestep-downswitchingregulatorfromastep-upswitchingcontroller,usingtheMAX1771,ahigh-efficiency,step-upDC-DCcontrolleroperatinginpulse-frequencymodulation(PFM)mode.AsimilarversionofthisarticleappearedintheSeptember6,1999issueofEETimesmagazine.Positivestep-downswitc……

摘要：本应用笔记显示了一个简单和节省空间的方式一般为前端电源的负参考电压。MAX828/MAX829电荷泵提供负参考电压，降低功耗，并增加了偏置电源的可靠性。Maxim>AppNotes>AutomotivePower-SupplyCircuitsKeywords:negativereferencevoltage,common-modenoiseimmunity,chargepump,voltageinverter,rectifier,telecom,front-endpowerDec01,2000supplyAPPLICATIONNOTE971TinyChargePumpProvidesHighlyReliableLow-CostSolutiontoNegativeReferenceVoltageAbstract:Thisapplicationnoteshowsasimpleandspace-savingwaytogeneralanegativereferencevoltageforafront-endpowersupply.TheMAX828/MAX829chargepumpprovidesanegativereferencevoltage,reducespowerdissipation,andincreasesbiassupplyreliability.Additionalinformation:DatasheetfortheMAX828/MAX829Technicalsupport:powerIntelecomapplications,particularlytherectifierapplications……

摘要：收缩地方电子电路对电源的要求保持同步。PCMCIA卡格式迫使设计师考虑转换器拓扑结构，并保持监督的眼睛，满足超薄设计要求的组件。此教程讨论PMICIA卡的转换器设计。超薄设计，文章建议线性稳压器，电荷泵和基于电感的开关稳压器。数转换器的弱点的优势拓扑结构进行了分析。Maxim>AppNotes>BatteryManagementPower-SupplyCircuitsKeywords:PCMCIA,PCMemoryCardInternationalAssociation,Type-1PCMCIA,3.3VPC-cardstandard,3Vto5Vconverter,step-upDC-Jan31,2001DCconverter,powersupply,PWMboostregulator,PFMboostregulator,step-downregulator,chargepump,negativechargepump,GaAsFET,flybackconverter,SEPICAPPLICATIONNOTE658ChoosetheRightUltra-ThinDC-DCConverterforaCompactPCMCIACardAbstract:Shrinkingelectroniccircuitsplacedemandsonpowersuppliestokeeppace.ThePCMCIA-cardformatsforcedesignerstoconsiderconvertertopologiesandkeepawatchfuleyeforcomponentsthatmeetultra-thindesignrequirements.ThistutorialdiscussesconverterdesignsforPMICIAcards.Forultra-thindesigns,thearticler……

摘要：电流检测放大器通常远高于地面操作，但故障条件下可以推动地面以下的感觉输入，绘制通过ESD保护二极管的电流过大损坏设备。该电路保护系列晶体管，每个输入连接PMOS管阻塞特定的高边电流检测放大器（MAX4080）。Maxim>Designsupport>Appnotes>AmplifierandComparatorCircuits>APP4837Maxim>Designsupport>Appnotes>CircuitProtection>APP4837Keywords:current-senseamplifiers,negativefaultvoltage,ESD-protectiondiodesFeb09,2011APPLICATIONNOTE4837ProtectCurrent-SenseAmplifiersfromNegativeOvervoltageBy:ArpitMehta,StrategicApplicationsEngineerPrashanthHolenarsipurAbstract:Current-senseamplifiersnormallyoperatewellaboveground,butafaultconditioncandrivethesenseinputsbelowground,damagingthedevicebydrawingexcessivecurrentthroughtheESD-protectiondiodes.Thiscircuitprotectsaparticularhigh-sidecurrent-sense……

摘要：本应用笔记采用了高边电流检测放大器监测从​​负电源电压的电流。该电路使用了IC的宽共模输入范围VSENSE在负电源和水平转向正输出电压的小信号放大。Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSBATTERYMANAGEMENTCIRCUITPROTECTIONMEASUREMENTCIRCUITSKeywords:currentsensor,negativesupply,currentsenseamplifier,negativecurrentmonitor,currentsenseMay11,2003amp,currentmonitorAPPLICATIONNOTE2011High-SidePositiveCurrentSensorMonitorsNegativeSupplyAbstract:Thisapplicationnoteusesahigh-sidecurrent-senseamplifiertomonitorthecurrentfromanegativesupplyvoltage.ThecircuitusestheIC'swidecommon-modeinputrangetoamplifyasmallVsensesignalatthenegativesupplyandlevelshiftituptoapositiveoutputvoltage.Alldedicatedcurrent-senseamplifiersaredesignedforhigh-sidesensingonapositivesupply,butyoucanadaptthemtomonitoranegativesupply(Figur……

摘要：这样的设计理念，展示了如何规范的LCD偏压发生器无需电感。基于MAX868稳压，反相电荷泵电荷泵的设计取代了开关模式设计，以产生一个负电压偏置的LCD。负，反相电荷泵的反馈路径中几个组件生产逆变器四倍频电路。Maxim>AppNotes>DisplayDriversKeywords:switch-modepowersupply,chargepump,regulatedchargepump,invertingchargepump,regulatednegativevoltage,inverterDec17,2001quadrupler,personaldigitalassistant,PDAAPPLICATIONNOTE239RegulatedLCD-BiasGeneratorRequiresNoInductorAbstract:ThisdesignideashowshowaregulatedLCDbiasgeneratorrequiresnoinductor.Acharge-pumpdesignbasedontheMAX868regulated,invertingchargepumpreplacesaswitch-modedesigntogenerateanegativevoltageforbiasinganLCD.Afewcomponentsinthefeedbackpathofanegative,invertingchargepumpproduceaninverter-quadruplercircuit.AsimilarideaappearedintheMarch9,1998issueofElectronicDesign.Astringentheightlimitationon……

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……

PassTransistorBoostsCurrentfromNegativeLinearRegulator……