标签: logarithmic

Amongtheclassesoflogarithmicamplifiers,theDClogampcontinuestobeaverypowerful,cost-effectivesolutionforcompressingwide-dynamic-rangesensorsignals.ThisarticlederivestheoverallDClogamptransferfunctionfromtheVBE-to-ICtransfercharacteristicofbipolartransistors.Itdiscussesthecircuitblocksencounteredinamodern-dayintegratedDClogamp,thevariouserrorsaffectinglogampperformance,andadesignexamplefeaturingtheMAX4206.Finally,suggestionsforoptimizinglogampperformancethroughcalibrationanddesignpointersaredetailed.……

摘要：线性数字电位器，可用于任意电压曲线和波形。为数字电位器的替代名称是一个“字符串”数字-模拟转换器（DAC）。测井盆是线性锅产生对数响应的应用，如音频的艺术。Maxim>AppNotes>A/DandD/AConversion/SamplingCircuitsAudioCircuitsDigitalPotentiometersGeneralEngineeringTopicsKeywords:digitalpots,potentiometer,voltagedivider,sensorconditioning,ratiometric,precisionresistor,Dec11,2008resistance,ratio,singlepowersupply,temperaturecoefficient,lowdrift,linear,log,logarithmic,arbitrarywaveformcurve,stringDAC,audioAPPLICATIONNOTE4346Pots,Pans,Logs,andLinearDigitalPotsCreateArbitraryVoltageCurvesBy:BillLaumeisterAbstract:Lineardigitalpotentiometerscanbeusedtomakearbitraryvoltagecurvesandwaveforms.Analternativenameforadigitalpotisa"string"digital-to-analogconverter(DAC).Loggingpotsistheartofmakingalinearpotproducealogarithmicresponsefora……

摘要：数字电位器（盆）提供音频音量（增益）控制应用的优势，可以取代笨重的机械电位器，尤其是在手持便携设备，如MP3播放器，掌上电脑，手机，移动互联网设备，或立体声调幅/调频收音机。本文档介绍了音频控制，如对数锥盆（日志盆）提供的数字电位器的类型。它会检查使用日志锥盆和音频放大器的几种常见的设计，评估他们的优点和缺点，并建议电路设计。Maxim>AppNotes>AudioCircuitsDigitalPotentiometersKeywords:digitalpot,digitalpotentiometer,audiovolumecontrol,MAX5407,MAX5408,MAX5409,MAX5410,MAX5411,volumecontrol,Dec26,2002volumeadjust,digitalvolumeadjustment,logpots,digitallogpots,logarithmictaper,logarithmic,potentiometersAPPLICATIONNOTE1828AudioGainControlUsingDigitalPotentiometersAbstract:Digitalpotentiometers(pots)offeradvantagesforaudiovolume(gain)controlapplicationsandcanreplacebulkymechanicalpots,especiallyinhandheldportabledevicessuchasMP3players,PDAs,cellphones,mobileInternetdevices,orstereoAM/FMradios.Thisdocumentdescribesthetypesofdigitalpotsavailableforaudiocontrolsuchaslogarithmictaperpots(logpots).Itexaminessev……

摘要：本应用笔记介绍了一种简单，独立的面板显示电路，驱动12个LED的数列。LED的列是一个与6分贝台阶高度12步的日志指标，形成一个72分贝的总列范围。电路的精度和稳定性，是指所设计的ADC的规格。MAX127612位ADC的特点。Maxim>AppNotes>A/DandD/AConversion/SamplingCircuitsDisplayDriversKeywords:logarithmicpaneldisplays,LEDpanels,analog-digitalconverters,ADCsSep21,2009APPLICATIONNOTE4442LogarithmicLEDPanelDisplayHas72dBRangeBy:TamerMogannamAbstract:Thisapplicationnotepresentsasimple,stand-alonepanel-displaycircuitthatdrivesa12-LEDlogarithmiccolumn.TheLEDcolumnisa12-steplogindicatorwith6dBstepheight,formingatotalcolumnrangeof72dB.Thecircuit'saccuracyandstabilityaredefinedbythespecificationsforthedesign'sADC.TheMAX127612-bitADCisfeatured.ThisdesignideaappearedintheOctober31,2006issueofEETimesmagazine.Panel-levellogarithmic-columndisplaysareusuallybuilti……

摘要：该电路从3.3V电源并联驱动多达四个白光LED，并调整总LED电流从1mA到106毫安在64个步骤，每一个为1dB。Maxim/Dallas>AppNotes>AUTOMOTIVEDIGITALPOTENTIOMETERSDISPLAYDRIVERSKeywords:portablepower,whiteLEDs,logarithmicdimming,chargepump,digitalpotentiometerJul20,2004APPLICATIONNOTE3287White-LEDDriverProvides64-StepLogarithmicDimmingThiscircuitdrivesasmanyasfourwhiteLEDsinparallelfroma3.3Vsource,andadjuststhetotalLEDcurrentfrom1mAto106mA,in64stepsof1dBeach.ThecircuitofFigure1isdesignedforportable-powerapplicationsthatrequirewhiteLEDswithadjustable,logarithmicdimminglevels.ItdrivesasmanyasfourwhiteLEDsfroma3.3Vsource,andadjuststhetotalLEDcurrentfrom1mAto106mAin64stepsof1dBeach.ThedriverisachargepumpthatmirrorsthecurrentISET(sourcedfromU3'sSETterminal)……