Driving Audio Piezoelectric Transducers

Abstract:Thisaudioapplicationnoteidentifiesanddescribesthekeyelementsindesigningadriverforapiezoelectrictransducer(PZT).Therelationshipbetweensourceimpedanceandsoundpressurelevelismeasured,single-ended(S/E)andbridge-tiedload(BTL)drivingschemesarecomparedandtheinputimpedanceofaPZTischaracterized.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