摘要：并联稳压器提供了一个跨越数字电位器，运算放大器和晶体管结合，形成了一个软件可编程，电压控制电流源恒定参考电压。
Maxim>Designsupport>Appnotes>CommunicationsCircuits>APP3464Keywords:currentsource,software-programmable,voltagecontrolled,digitalpotentiometerMar14,2005APPLICATIONNOTE3464PrecisionCurrentSourceisSoftware-ProgrammableAbstract:Ashuntregulatorprovidesaconstantreferencevoltageacrossadigitalpotentiometerthat,inconjunctionwithanopampandtransistor,formsasoftware-programmable,voltage-controlledcurrentsource.Withtheadditionofafewinexpensiveminiaturecomponents,thehard-wired,voltage-controlledcurrentsourceofyesterdaybecomesasoftware-programmablevoltage-controlledcurrentsource(Figure1).Adigi
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