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1、毕业论文题目:基于FPGA的任意信号发生器II摘要随着现代电子技术的发展,在电子测量及研究领域,常常需要用到各种高精确度的信号。单传统信号源的实现过多依赖硬件,而且外围电路过于复杂,调试过程比较麻烦,不容易修改和升级。基于这些要求,本文设计了一种利用DDS(直接数字合成)技术的任意信号发生器模块,这种仪器不但产生的波形种类多、频率高,而且还有体积小、可靠性高、操作灵活、使用方便及可由计算机直接控制等特点,相对于传统的独立仪器他易于系统的集成,可以最大的发挥计算机与微电子技术在当今测试领域中的应用。本文利用DDS技术并基于大规模FPGA器件实际并实现了任意信
2、号发生器,其中介绍了实现的基本原理,给出了电路框图,说明了其内部结构和软件流程,简要指出器件的选择依据,最后给出仿真波形。同时阐述了设计思路和实现方法。经过修改和测试,输出波形达到技术要求,且整个系统结构紧凑、电路简单、控制灵活、稳定可靠、可扩展性强,其性能指标明显由于传统的函数发生器。论文结尾处对任意信号发生器技术和DDS技术做了进一步展望。关键词:信号发生器DDSFPGA16TitleFPGAbaseddesignarbitraryfrequencygeneratorAbstractAlongwiththemodernelectronictechnol
3、ogy'sdevelopment,intheelectronicsurveyingandtheresearcharea,needstouseeachkindofhighprecisionfrequentlythesignal.Thesingletraditionalsupplyoscillatorrealizesexcessivelyreliesonthehardware,moreovertheperipheralcircuitistoocomplex,thedebuggingprocessisquitetroublesome,isnoteasytorev
4、iseandthepromotion.Basedontheserequests,thisarticledesignedonekindtouseDDS(directdigitalsynthesis)thetechnicalrandomsignalgeneratingdevicemodule,notonlythiskindofinstrumentproducedtheprofiletypeweremany,thefrequencywashigh,moreoveralsohadthevolumetobesmall,thereliabilitywashigh,th
5、eoperationwasflexible,theeasytooperateandmightbycharacteristicsandsooncomputerpositivegoverning,beoppositeinthetraditionalindependentinstrumenthetheeasysystem'sintegration,maythebiggestdisplaycomputerandthemicroelectronictechnologyistestinginthedomainnowtheapplication.Thisarticleu
6、sedtheDDStechnologyandactualandhasrealizedtherandomsignalgeneratingdevicebasedonthelarge-scaleFPGAcomponent,introducedrealizedthebasicprinciple,hasgiventheelectriccircuitdiagram,explaineditsinternalstructureandthesoftwareflow,pointedoutbrieflycomponent'schoicebasis,gavethesimulati
7、onprofilefinally.Simultaneouslyelaboratedthedesignmentalityandrealizesthemethod.Aftertherevisionandthetest,theoutputwaveshapeachievethespecification,andtheoverallsystemstructureiscompact,theelectriccircuitissimple,controlnimble,stablereliable,extendibility,itsperformanceindexobvio
8、uslyasaresultoftraditionalfunctio