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1、、学位论文太原工业学院学位论文英文翻译作者姓名：学科、专业：通信工程学号：指导教师：完成日期：19、英文原文：IntroductionofdigitalfrequencymeterDigitalFrequencyofcommunicationsequipment,audioandvideo,andotherareasofscientificresearchandproductionofanindispensableinstrument.ProgrammingusingVerilogHDLDesignandImplem
2、entationofthedigitalfrequency,inadditiontotheplasticpartofthemeasuredsignal,anddigitalkeyforapartoftheshow,allinanFPGAchiptoachieve.Theentiresystemisverylean,flexibleandhaveamodificationofthescene.1AndotherprecisionmeasuringfrequencyPrinciple.Frequencymeasureme
3、ntmethodscanbedividedintotwokinds:(1)directmeasurementmethod,thatis,atacertaintimemeasurementgatemeasuredpulsesignalnumber.(2)indirectmeasurements,suchasthecyclefrequencymeasurement,VFconversionlaw.FrequencyMeasurementindirectmeasurementmethodappliesonlytolow-f
4、requencysignals.Basedontheprinciplesoftraditionalfrequencymeasurementofthefrequencyofmeasurementaccuracywillbemeasuredwiththedeclineinsignalfrequencydecreasesinthemorepracticallimitations,suchastheaccuracyandfrequencyofmeasurementnotonlyhashighaccuracy,butalsoi
5、nthewholefrequencyregiontomaintainconstanttestaccuracy.ThemainmethodofmeasurementfrequencymeasurementPreferencesgatedsignalGATEissuedbytheMCU,GATEtimewidthonthefrequencymeasurementaccuracyoflessimpact,inthelargercontextofchoice,aslongastheFPGAin32of100inthecoun
6、terbMSignalsarenotoverflowline,inaccordancewiththetheoreticalcalculationGATEtimecanbegreaterthanthewidthTc42.94s,butduetothesingle-chipmicrocomputerdataprocessingcapacityconstraints,theactualwidthoflesstime,generallyintherangeofbetween0.1schoice,thatis,high-fre
7、quency,shortergate;,lowgatelonger.ThistimegatewidthTcbasedonthesizeofthemeasuredfrequencyautomaticallyadjustfrequencymeasurementinordertoachievetheautomaticconversionrange,andexpandedtherange19、offrequencymeasurement;realizationoftheentirescopeofmeasurementaccu
8、racy,reducethelow-frequencymeasurementerror. ThedesignofthemainmethodsofmeasuringthefrequencymeasurementandcontrolblockdiagramasshowninFigure1.Figure1Preferencesgatedsign
