动圈式仪表措施低级电流

摘要：表示MAX4172IC替代通常用动圈式仪表分流电流放大器。该电路允许使用的动圈式仪表，甚至很大一部分是目前正在测量时计电流。Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSDIGITALPOTENTIOMETERSDISPLAYDRIVERSKeywords:moving-coilmeter,high-sidecurrentamplifier,remotemeasurement,displaydriversJun20,2005APPLICATIONNOTE3536Moving-CoilMeterMeasuresLow-LevelCurrentsAbstract:TheMAX4172ICsubstitutesacurrentamplifierfortheshuntnormallyassociatedwithamoving-coilmeter.Thiscircuitallowsuseofthemoving-coilmeter,evenwhenthemetercurrentisalargefractionofthecurrentbeingmeasured.Thedisplayofchoiceforcertainapplicationsremainsthelargemoving-coilmeter.Whileamoving-coilmetermaylacktheaccuracyofadigitalpanelmeter,theperceivedextrainformationderivedfromtheneedle'srateofchangecannotbematchedbythedigital