单一的运算放大器接收器/电流源电路的变化

摘要：分析了五个恒流电路设计的分歧。性能数据进行讨论，和电路设计的一些说明精度、动态阻抗、和法规遵从性范围之间的不同的妥协。Maxim>AppNotes>AmplifierandComparatorCircuitsKeywords:currentsource,currentsink,constant-currentsource,opampAug21,2006APPLICATIONNOTE3869VariationsAmongCurrent-Sink/SourceCircuitswithaSingleOpAmpAbstract:Thedesigndifferencesamongfiveconstant-currentcircuitsareanalyzed.Performancedataarediscussed,andillustratethedifferentcompromisesbetweenprecision,dynamicimpedance,andcompliancerangeforsomeofthecircuitdesigns.Acontrolledconstant-currentsourceorsinkisausefulcircuitblocktouseindesigningelectronicapplicationssuchassensorbias,amplifierbias,andspecialwaveformgeneration.Thesetypesofcircuitsexhibithigh-outputdynamicimpedance,whiledeliveringrelativelylargecurre