用LabVIEW模拟锁相环.doc

用LabVIEW模拟锁相环 毕业设计(论文)中文摘要 用LabVIEW模拟锁相环 摘要： 锁相电路是相位锁定环(Phase-Locked?Loop)的简称，主要由鉴相器、环路滤波、压控振荡器成?。主要是要掌握LabVIEW图形化编程特点，因为是软件来实现电路，就必须根据实际电路的功能，把它抽象为相应的逻辑来实现，因此需要既要彻底地掌握锁相环的理论知识，又要具备很强的虚拟仪器应用能力。充分调动积极思考，独立解决问题的能力。利用LabVIEW来实现锁相电路，主要是要掌握LabVIEW图形化编程特点，因为是用软件来实现电路，就必须根据实际电路的功能，把它抽象为相应的逻辑来实现，又因?LabVIEW的程序可以嵌套，所以在实现时可将其各个功能分别实现，然后以调用子程序的方式把它们组和在一起，因此设计时需要设计出一个大的框图，大的框图由多个子框图构成。虚拟锁相电路由时钟发生器、分频器、时钟及数据鉴相器、压控震荡器、移位寄存器这几个功能模块组成。 关键词：锁相环 鉴相器 压控振荡器 自动跟踪 毕业设计(论文)外文摘要 Title : Simulates the phase-locked loop with LabVIEW Abstract: The phase locking circuit is the phase locking link (Phase-Locked Loop) the abbreviation, mainly by the discriminator, the ring circuit filter, the pressure controls the oscillator to become.Mainly is must grasp the LabVIEW presente in figures and diagrams programming characteristic, because is the software realizes the electric circuit, must act according to the actual electric circuit the function, abstracts it for the corresponding logic realizes, therefore needs both to have to grasp the phase-locked loop thoroughly the theory knowledge, and must have the very strong hypothesized instrument application ability.The full reassignment positive ponder, the independence solves the question ability.Realizes the phase locking circuit using LabVIEW, mainly is must grasp the LabVIEW presente in figures and diagrams programming characteristic, because is realizes the electric circuit with the software, must act according to the actual electric circuit the function, abstracts it for the corresponding logic realizes, and further because the LabVIEW procedure may the nesting, therefore in realization time may realize separately its each function, then transfers the subroutine the way their group and in the same place, therefore designs time needs to design a big diagram, the big diagram constitutes by many sub-diagrams.The hypothesized phase locking circuit by the clock generator, the frequency divider, the clock and the data discriminator, the pressure co