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Description: 锁相环是一种反馈电路，其作用是使得电路上的时钟和某一外部时钟的相位同步。PLL通过比较外部信号的相位和由压控晶振（VCXO）的相位来实现同步的，在比较的过程中，锁相环电路会不断根据外部信号的相位来调整本地晶振的时钟相位，直到两个信号的相位同步。-PLL is a feedback circuit, and its role is to make the clock circuit and a phase of external clock synchronization. PLL signal by comparing the external voltage-controlled crystal phase and the (VCXO) to achieve synchronization phase, in comparison, the phase-locked loop circuit will continue in accordance with external signals of local oscillator phase to adjust the clock phase, until Phase synchronization of two signals.
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Size: 141312 |
Author: liusen |
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Description: 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，-PLL circuit is phase-locked loop (Phase Locked Loop) for short, mainly by the phase detector, loop filter, VCO into. Mainly to grasp the features of LabVIEW graphical programming,
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Size: 19456 |
Author: 生活的 |
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Description: 锁相技术在测控、通信、数字信号处理等众多领域得到了广泛的应用。虚拟锁相环成为锁相环发展趋势之一，根据锁相环路的基本组成及原理，利用LabVIEW软件提供的强大的数值计算和信号分析等能力对锁相环进行设计。实验和仿真结果表明该软件锁相环具有较好的捕获和跟踪性能。利用软件实现的锁相环比硬件锁相环具有更好的灵活性和通用性，同时具有结构简单、参数设计灵活等优点。-Lock-in technique in many areas of monitoring and control, communications, digital signal processing, has been widely used. Became one of the virtual phase-locked loop phase-locked loop trends, according to the basic principles of composition and phase-locked loop, using LabVIEW software provides powerful numerical calculation and signal analysis capabilities such as phase-locked loop design. Experimental and simulation results show that the software PLL has a better acquisition and tracking performance. Use of software than hardware locked loop PLL has better flexibility and versatility, but also has a simple structure, flexible design parameters, etc..
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Size: 47104 |
Author: longer |
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Description: 设计一个LabVIEW的锁相环程序，实现频率跟踪。-LabVIEW program to design a phase-locked loop to achieve a frequency tracking.
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Size: 229376 |
Author: 胡星 |
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