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时间: 2019-12-24 18:13
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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……