摘要:这种电路同步同时保持低THD,振幅的正弦波输出,通过三个几十年的频率(20Hz至20kHz)。Maxim>AppNotes>AudioCircuitsSignalGenerationCircuitsKeywords:testing,calibration,puresinewaves,sinewavegenerators,lowTHD,phase-lockedloops,PLL,binaryfrequencydividers,Aug17,2010switched-capacitorlowpassfilters,externalsynchronizationAPPLICATIONNOTE4504Locked-SyncSineGeneratorCoversThreeDecadeswithLowDistortionAbstract:Thiscircuitsynchronizesasinewaveoutputthroughthreedecadesoffrequency(20Hzto20kHz)whilemaintaininglowTHDandconstantamplitude.AsimilarversionofthisarticleappearedintheSeptember18,2009issueofEDNmagazine.Analogapplicationssuchastesting,calibration,andgeneralsystemoperationoftenrequireasinewaveformofaccurateamplitudeandfrequency,withlow
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