fpga答辩论文._dds数字部分的逻辑设计

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1、摘要信号发生器作为电子技术领域中最基本的电子仪器，广泛应用于各个领域中。随着电子信息技术的发展，对其性能的要求也越来越高，如要求频率稳定性高、转换速度快，具有调幅、调频、调相等功能。本论文报告为基于FPGA的DDS波形发生器，具有一定的实际意义。通过研究直接数字频率合成器（DirectDigitalFrequencySynthesis简称DDS或DDFS）的基本原理，掌握了DDS的核心相位累加器的功能；分析了FPGA的性能结构，了解到DA转换电路与FPGA之间的通信控制功能；结合外围电路，设计了基于FPGA的DDS波形发生器。本系统主要以FPGA芯片EP2C8Q208C8为核心，辅

2、以必要的模拟电路，在Verilog编写的程序控制下，构成了一个基于直接数字频率合成技术的波形发生器。关键词：FPGA；DDS；波形发生器；Verilog。AbstractSignalgeneratorinthefieldofelectronictechnologyasthemostbasicelectronicdevices,widelyusedinvariousfields.Withthedevelopmentofelectronicinformationtechnology,itsperformancerequirementsarealsogettinghigherandhig

3、her,suchashigh-frequencystabilityrequirements,conversionspeed,withAM,FM.ThetopicfortheFPGA-basedDDSwaveformgenerator,hasapracticalsignificance.ThroughresearchDirectDigitalSynthesis(DirectDigitalFrequencySynthesisreferredtoDDSorDDFS)tothebasicprinciplesoftheDDSgraspthecoreofthephaseaccumulatorf

4、unctionoftheperformanceoftheFPGA,DAconversioncircuitandthatcommunicationsbetweentheFPGAControlfunctionsinconjunctionwiththeexternalcircuit,thedesignoftheFPGA-basedDDSwaveformgenerator.ThissystemismainlytoFPGAchipEP2C8Q208C8asthecore,supplementedbythenecessaryanalogcircuit,inthepreparationofthe

5、Verilogprogramming,constitutesaBasedonDirectDigitalSynthesistechnologywavegenerator.Keywords:FPGA;DDS;WaveformGenerator;Verilog目录摘要................................................................................................................................IAbstract..........................

6、.....................................................................................................I第一章绪论.....................................................................................................................11.1引言................................................................

7、.....................................................11.2国内外现状.........................................................................................................11.2.1国外信号发生器现状......................................................