PWM脉宽调制信号源

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1、PWM脉宽调制信号源西北师范大学物理与电子信息工程学院电子信息工程专业电子甲班2005应届毕业生：程明东指导老师：裴东王全洲摘要基于计数器的工作原理，本文提出了一种具有复位功能的全数字脉宽调制器的实现电路，并对电路的工作原理和工作过程进行了详细的分析，借助于MAXplusⅡ设计平台，最后给出了实验波形和实验数据。实验结果验证了全数字脉宽调制器原理的正确性和电路的实用性。关键词同步信号数字脉宽调制器（DPWM）DigitalPulseWidthModulatorwithresetAbstractThepaperintroducesacircuitschemeo

2、fdigitalhighfrequencyPulseWidthModulatorwithresetbasedontheprincpleofcounters.ThestructureandoperationalprincipleofthecircuitareanalyzedindetailandthecircuitissimulatedbyMAXplusⅡ.Thesimulativeandexperimentalresultsshowthatthecircuitisaccurateandpractical.KeywordsSynchronSignalDigit

3、alPulseWidthModulator22目录引言································································31.CPLD·····························································41.1CPLD发展·······················································41.2CPLD的基本特点·············································

4、····41.3CPLD的在系统技术···············································51.4CPLD应用·······················································52.PWM信号产生的方案和论证·········································62.1PWM信号的用途··················································62.2PWM信号产生方案的论证·················

5、·························63.设计概述···········22··············································63.1设计思路························································73.2信号的流程······················································73.3算法和电路······················································7

6、3.4PWM信仿真·····················································83.5PWM信号程序···················································83.6PWM信号放大电路··············································144.石英晶体振荡电路·················································154.1正玄波振荡电路的频率稳定问题···················

7、·················154.2石英晶体的基本特性与等效电路···································15224.3石英晶体振荡器·················································164.4时钟信号的产生·················································165.译码显示电路·····················································175.1数码显示器··············

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