驾驶音频压电传感器

摘要：此音频应用笔记识别和描述为压电陶瓷（PZT）驱动程序设计的关键要素。源阻抗和声压级之间的关系进行测量，单端（S/E）和桥接负载（BTL）驾驶的方案进行比较和一个压电陶瓷的输入阻抗的特点。Maxim>AppNotes>AmplifierandComparatorCircuitsAudioCircuitsKeywords:audiodriver,BTL,bridgetiedload,PZT,piezoelectric,audiotransducerMar26,2002APPLICATIONNOTE988DrivingAudioPiezoelectricTransducersAbstract:Thisaudioapplicationnoteidentifiesanddescribesthekeyelementsindesigningadriverforapiezoelectrictransducer(PZT).Therelationshipbetweensourceimpedanceandsoundpressurelevelismeasured,single-ended(S/E)andbridge-tiedload(BTL)drivingschemesarecomparedandtheinputimpedanceofaPZTischaracterized.Audiblepiezoelectrictransducers(PZTs)areoftenusedaswarningdevicesoralarms.Manufacturersofpiezotransducerspublishcurvesandspecificationsconcerningtheirrespectivedevi