模拟锁相环的设计_通信工程毕业论文范文格式_论文天下网 关键词 ：锁相环，自动跟踪，固定的相位差 [gap=791]Key words: phase-locked loop, automatic tracking, a fixed phase difference
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当两相干光附加一按固定频率变化的相位差时，其干涉条纹的光强将随之交变，即为相位调制干涉。
In addition to alternating phase difference between two aims of interferometer, the intensity of light of the interference fringes will vary in the same frequency, which is called as phase modulation.
最后根据系统各个参数对其性能进行分析，在硬件平台上实现了固定相位差的相参正弦信号的产生，验证了设计的正确性。
Finally, the performance of system is analyzed depends on the parameter. Generating sine wave of fixed phase difference is realized on hardware Platform, which confirms the correctness of design.
介绍了了几种测量相位差的方法，分析了各自的不足，最后提出了一种新型的利用固定相移测量同频正弦信号相位差的方法。
This paper firstly introduces some measurement methods and then points out their deficiencies. At last, a new method is proposed, which uses aptotic phase shifting method to measure phase difference.
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