| 基于频率合成的相位差测量方法 |
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| 引用本文： | 王旭明,王志云. 基于频率合成的相位差测量方法[J]. 电测与仪表, 2007, 44(4): 13-15 |
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| 作者姓名： | 王旭明 王志云 |
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| 作者单位： | 军械工程学院,石家庄,050003 |
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| 摘 要： | 介绍了一种基于频率合成技术的相位差测量方法,通过频率合成的方法构造一个与被测信号有一定频差的稳定信号,以它作为本振信号与两路被测信号进行混频,将高频率信号相位差转换到低频段进行测量,可以实现很宽的测量范围以及较高的精度.
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| 关 键 词： | 相位差 频率合成 DDS CPLD |
| 文章编号： | 1001-1390(2007)04-0013-03 |
| 修稿时间： | 2006-10-12 |
A phase difference testing method based on frequency synthesis |
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| WANG Xu-ming,WANG Zhi-yun. A phase difference testing method based on frequency synthesis[J]. Electrical Measurement & Instrumentation, 2007, 44(4): 13-15 |
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| Authors: | WANG Xu-ming WANG Zhi-yun |
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| Affiliation: | Ordnance Engineering College, Shijiazhuang 050003, China |
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| Abstract: | The measurement of phase-difference between signals of same frequency is very important in electronic measurement and Signal detection. This paper introduces a phase difference testing method based on frequency synthesis. By producing a signal which has a fre- quency difference with the input signal through frequency synthesis, and taking it as the local oscillator to mix with input signals, it can convert the phase difference into low-frequency field to measure. |
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| Keywords: | phase difference frequency synthesis DDS CPLD |
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