廉价的峰值检测仪的功能 Droopless 操作

摘要：这种电路使用数字电位器(罐)和比较器，功能不正常与传统上被用整流器和示例搁置(S/H)的峰值探测器相关联的droopless操作。Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSDIGITALPOTENTIOMETERSKeywords:peakdetector,sampleandhold,comparators,digitalpotentiometers,pots,zerodroop,drooplessJan26,2001APPLICATIONNOTE1163InexpensivePeakDetectorFeaturesDrooplessOperationAbstract:Thiscircuit,whichusesadigitalpotentiometer(pot)andacomparator,featuresdrooplessoperationthatisnotnormallyassociatedwithpeakdetectorsthathavetraditionallyusedrectifiersandsample-and-holds(S/H).Mostpeakdetectorsemployarectifierandasample-and-holdcircuit,whichispronetooutputdroop.Inanalternativeapproach,showninthefigurebelow,a5-bitdigitalpotentiometerwithaservoloopisusedtocreateaninexpensivepeakdetectorwithalogic-levelreset