外文翻译-关于直接数字频率合成器-其他专业

All About Direct Digital SynthesisBy Eva Murphy [eva.murphy@analog.com]Colm Slattery [colm.slattery@

外文翻译（原文） AllAboutDirectDigitalSynthesis ByEvaMurphy[eva.murphy@analog.com] ColmSlattery[colm.slattery@analog.com] WhatisDirectDigitalSynthesis? Directdigitalsynthesis(DDS)isamethodofproducingan analogwaveform—usuallyasinewave—bygeneratinga time-varyingsignalindigitalformandthenperforminga digital-to-analogconversion.BecauseoperationswithinaDDS deviceareprimarilydigital,itcanofferfastswitchingbetween outputfrequencies,finefrequencyresolution,andoperationovera broadspectrumoffrequencies.Withadvancesindesignand processtechnology,today’sDDSdevicesareverycompactand drawlittlepower. Whywouldoneuseadirectdigitalsynthesizer(DDS)?Aren’t thereothermethodsforeasilygeneratingfrequencies? Theabilitytoaccuratelyproduceandcontrolwaveformsof variousfrequenciesandprofileshasbecomeakeyrequirement commontoanumberofindustries.Whetherprovidingagile sourcesoflow-phase-noisevariable-frequencieswithgoodspurious 1