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1、徐州工程學(xué)院畢業(yè)設(shè)計(jì)(論文)圖書分類號:密級:摘要函數(shù)信號發(fā)生器是各種測試和實(shí)驗(yàn)過程中不可缺少的工具,在通信、測量、雷達(dá)、控制、教學(xué)等領(lǐng)域應(yīng)用十分廣泛。隨著我國經(jīng)濟(jì)和科技的發(fā)展,對相應(yīng)的測試儀器和測試手段也提出了更高的要求,信號發(fā)生器己成為測試儀器中至關(guān)重要的一類。本文在探討函數(shù)信號發(fā)生器幾種實(shí)現(xiàn)方式的基礎(chǔ)上,采用直接數(shù)字頻率合成(DDS)技術(shù)實(shí)現(xiàn)函數(shù)信號發(fā)生器。在對直接數(shù)字頻率合成(DDS)技術(shù)充分了解后,本文選擇以Altera公司生產(chǎn)的FPGA芯片為核心,以硬件描述語言VerilogHDL為開發(fā)語言,設(shè)計(jì)實(shí)現(xiàn)了可以產(chǎn)生任意波形(
2、以正弦波為例)和固定波形的(以方波和鋸齒波為例)的函數(shù)信號發(fā)生器。文中詳細(xì)闡述了直接數(shù)字頻率合成(DDS)、波形產(chǎn)生以及調(diào)幅模塊的設(shè)計(jì),并給出了相應(yīng)的仿真結(jié)果。本文最后給出了整個(gè)系統(tǒng)的仿真結(jié)果,即正弦波、方波、鋸齒波的波形輸出。實(shí)驗(yàn)表明,用現(xiàn)場可編程門陣列(FPGA)設(shè)計(jì)實(shí)現(xiàn)的采用直接數(shù)字頻率合成(DDS)技術(shù)的函數(shù)信號發(fā)生器,克服了傳統(tǒng)方法的局限,實(shí)現(xiàn)了信號發(fā)生器多波形輸出以及方便調(diào)頻、調(diào)幅的功能。關(guān)鍵詞函數(shù)信號發(fā)生器;直接數(shù)字頻率合成;現(xiàn)場可編程門陣列;VerilogHDL-II-徐州工程學(xué)院畢業(yè)設(shè)計(jì)(論文)-II-徐州工程學(xué)院
3、畢業(yè)設(shè)計(jì)(論文)AbstractFunctionGeneratorisanindispensabletoolinaprocessofvarioustestsandexperiments.Itiswidelyusedincommunication,measurement,radar,control,teachingandotherfields.WiththedevelopmentofChina'seconomicandtechnological,thecorrespondingtestequipmentandtestmethodsar
4、ealsoputforwardhigherrequirements,andthesignalgeneratorhasbecomeavitaltestinstrument.Thearticleexaminestheseveralimplementationsofthefunctiongenerator.Andithasachievedthefunctiongeneratorwhichiscompletedbydirectdigitalfrequencysynthesis(DDS)technology.Throughunderstand
5、ingthedirectdigitalfrequencysynthesis(DDS)technology,thispaperchosetotheAlteraCorporations’FPGAchipsasthecoreofdesign.Thefunctiongeneratorwhichcanproducesine,squarewave,sawtoothwavewasdesigned.ItalsousedhardwaredescriptionlanguageVerilogHDLasdevelopmentlanguage.Thepape
6、rdescribedthedesignofthemainmodule,suchasdirectdigitalsynthesizer(DDS),waveformgenerationandmodulationmodule.Andthecorrespondingsimulationresultswerealsopresented.Atlast,thesimulationresultsofthewholesystemwerepresented,thatis,sine,square,sawtoothwaveformhasbeencarried
7、out.ExperimentsshowthatthefunctiongeneratorbasedonFPGAanddirectdigitalfrequencysynthesis(DDS)technologyhasovercamethelimitationsoftraditionalmethodsandachievedasignalgeneratorwhichcangeneratemultiplewaveformsandhasfacilitateFM,AMfunction.KeywordsFunctionGenenratorDirec
8、tDigitalFreguencySynthesizerFPGAVerilogHDL-II-徐州工程學(xué)院畢業(yè)設(shè)計(jì)(論文)目錄1緒論11.1背景及意義11.2波形發(fā)生器研究現(xiàn)狀11.2.1波形發(fā)生器的發(fā)展?fàn)顩r11.2.2國外波形發(fā)生器產(chǎn)