外文翻译-简易数字频率计的设计

外文翻译-简易数字频率计的设计

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时间:2018-07-12

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1、外文资料原文IntroductionofdigitalfrequencymeterDigitalFrequencyofcommunicationsequipment,audioandvideo,andotherareasofscientificresearchandproductionofanindispensableinstrument.ProgrammingusingVerilogHDLDesignandImplementationofthedigitalfrequency,inadditiontotheplasticpartoft

2、hemeasuredsignal,anddigitalkeyforapartoftheshow,allinanFPGAchiptoachieve.Theentiresystemisverylean,flexibleandhaveamodificationofthescene.1.AndotherprecisionmeasuringfrequencyPrincipleFrequencymeasurementmethodscanbedividedintotwokinds:(1)directmeasurementmethod,thatis,a

3、tacertaintimemeasurementgatemeasuredpulsesignalnumber.(2)Indirectmeasurements,suchasthecyclefrequencymeasurement,VFconversionlaw.FrequencyMeasurementindirectmeasurementmethodappliesonlytolow-frequencysignals.Basedontheprinciplesoftraditionalfrequencymeasurementofthefrequ

4、encyofmeasurementaccuracywillbemeasuredwiththedeclineinsignalfrequencydecreasesinthemorepracticallimitations,suchastheaccuracyandfrequencyofmeasurementnotonlyhashighaccuracy,butalsointhewholefrequencyregiontomaintainconstanttestaccuracy.Themainmethodofmeasurementfrequenc

5、ymeasurementPreferencesgatedsignalGATEissuedbytheMCU,GATEtimewidthonthefrequencymeasurementaccuracyoflessimpact,inthelargercontextofchoice,aslongastheFPGAin32of100inthecounterbMSignalsarenotoverflowline,inaccordancewiththetheoreticalcalculationGATEtimecanbegreaterthanthe

6、widthTc42.94s,butduetothesingle-chipmicrocomputerdataprocessingcapacityconstraints,theactualwidthoflesstime,generallyintherangeofbetween0.1schoice,thatis,high-frequency,shortergate;,lowgatelonger.ThistimegatewidthTcbasedonthesizeofthemeasuredfrequencyautomaticallyadjustf

7、requencymeasurementinordertoachievetheautomaticconversionrange,andexpandedtherangeoffrequencymeasurement;realizationoftheentirescopeofmeasurementaccuracy,reducethelow-frequencymeasurementerror.    Thedesignofthemainmethodsofmeasuringthefrequencymeasurementandcontrolblock

8、diagramasshowninFigure1.Figure1PreferencesgatedsignalGATEissuedbytheMCU,GATEtimewidthoflessfrequencymea

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