分析数字控制的文氏桥振荡器

摘要：对所有的低频振荡器配置，维恩桥是最容易使用的。它是可靠的，使用标准组件，提供了一个很好的正弦波，并围绕它设计的运算放大器的类型是相当免疫。然而，文氏桥被误解和过于简单，导致设计师挫折。本文介绍的理论和实际使用维恩电桥振荡器，以及如何使电路更稳定和更factory-/user-flexible。

Maxim>AppNotes>DIGITALPOTENTIOMETERSKeywords:WienBridge,DigitalPotentiometer,digitalpot,oscillatorMay24,2006APPLICATIONNOTE3846AnalysisofaDigitallyControlledWien-BridgeOscillatorAbstract:Ofallthelow-frequencyoscillatorconfigurations,theWienbridgeistheeasiesttouse.Itisreliable,usesstandardcomponents,givesagoodsinewave,andisfairlyimmunetothetypeofopamparoundwhichitisdesigned.AWienbridgecan,however,bemisunderstoodandoversimplified,leadingtodesignerfrustration.ThisarticledescribesthetheoryandpracticalitiesofusingaWien-bridgeoscillator,andhowtomakethecircuitmorestableandmorefactory-/user-flexible.TheWien-BridgeCircuitThecircuitofastandardWien-br