| 基于压频转换的相敏检波器 |
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| 引用本文： | 刘文杰,李宝华. 基于压频转换的相敏检波器[J]. 吉林大学学报(信息科学版), 2008, 38(3): 280-285 |
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| 作者姓名： | 刘文杰 李宝华 |
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| 作者单位： | 吉林大学电子科学与工程学院，长春130012 |
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| 基金项目： | 吉林省科技发展计划基金资助项目( 20190302010GX) |
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| 摘 要： | 为了实现对微弱信号的检测，提出了一种基于压频转换的相敏检波器。利用压频转换电路，将被测信号中的模拟电压值转换成频率，使用单片机根据参考信号对转换后的频率信号进行计数和数字滤波，从而实现小信号检测。分析了相关检测原理，完成了系统的软硬件设计与实现，并进行了验证实验及误差分析，结果验证了本方案的正确性和可行性。该系统原理简单、成本低廉、可靠性强、方便实用，在微弱信号检测上具有广阔的应用前景。
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| 关 键 词： | 相敏检波 压频转换 微弱信号检测 滤波 |
| 收稿时间： | 2019-11-18 |
Phase Sensitive Detector Based on Voltage-Frequency Conversion |
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| LIU Wenjie,LI Baohua. Phase Sensitive Detector Based on Voltage-Frequency Conversion[J]. Journal of Jilin University:Information Sci Ed, 2008, 38(3): 280-285 |
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| Authors: | LIU Wenjie LI Baohua |
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| Affiliation: | College of Electronic Science and Engineering，Jilin University，Changchun 130012，China |
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| Abstract: | In order to detect weak signal，a phase sensitive detector based on voltage frequency conversion isproposed． The voltage to be measured is converted into frequency through the voltage frequency conversioncircuit，and the frequency signal is counted and digital filtered by the single-chip microcomputer according to thereference signal，so as to realize weak signal detection． The related detection principle is analyzed，the hardwareand software design and implementation of the system are completed，the verification experiment and erroranalysis are carried out，and the correctness and feasibility of the scheme are verified． The system is simple inprinciple，low in cost，reliable，convenient and practical，and has a broad application prospect in weak signaldetection． |
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| Keywords: | phase sensitive detection voltage frequency conversion weak signal detection filter |
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