对数的LED的面板显示有72分贝的范围

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