调幅波信号源的设计与制作

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1、调幅波信号源的设计与制作摘要波形发生器是一种常用的信号源，广泛地运用在电子电路、自动控制系统、和教学实验等领域。文中以AT89C51单片机为核心设计了一个低频函数信号发生器。信号发生器采用数字波形合成技术,通过硬件电路和软件程序相结合,可输出自定义波形,如正弦波、方波、三角波、梯形波及其他任意波形，波形的频率和幅度在一定范围内可任意改变。波形和频率的改变通过软件控制，幅度的改变通过硬件实现。介绍了波形的生成原理、硬件电路和软件部分的设计原理。关键词:低频信号发生器;单片机;D/A转换IAbstractWaveformgeneratorisacommonsigna

2、lsource,widelyusedinelectroniccircuits,automaticcontrolsystem,andteachingexperimentetc..Basedonthe89C51microcontrollerasthecoredesignofalowfrequencysignalgenerator.Thesignalgeneratorwithdigitalwaveformsynthesistechnology,combinedwiththehardwarecircuitandsoftwareprogram,customoutputwa

3、veforms,suchassinewave,trianglewave,trapezoidal,FangBoandotherarbitrarywaveform,frequencyandamplitudeofthewaveformcanbechangedinacertainrange.Thewaveformandfrequencychangethroughsoftwarecontrol,themagnitudeofchangebyhardware.Thedesignprincipleofthegenerationprinciple,hardwarecircuita

4、ndsoftwarepartofthewaveform.Keywords:Lowfrequencysignalgenerator；Singlechipmicrocomputer；D/AconversionII目录1绪论.............................................................................................................................................11.1研究背景和意义.......................

5、...........................................................................................11.2国内外研究现状..................................................................................................................11.3主要内容和结构安排.......................................................

6、...................................................2方案设计.........................................................................................................................................32.1方案设计思想.................................................................................

7、.....................................32.1.1波形产生方案................................................................................................................32.1.2改变幅度方案...............................................................................................................

8、32.2工作原理....