相位/比例鉴频综合实验电路的设计与实现  

Design and Implementation of Phase/Proportional Frequency Discrimination Integrated Experimental Circuit

作　　者：杨光义[1] 乔昊明 王舒远 曹子杰 YANG Guangyi;QIAO Haoming;WANG Shuyuan;CAO Zijie(Electronic Information School,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学电子信息学院,武汉430072

出　　处：《实验科学与技术》2023年第6期89-94,共6页Experiment Science and Technology

基　　金：武汉大学教学改革建设项目(2019JG074,2020JG017);武汉大学设备处实验技术项目(WHU-2022-SYJS-07)。

摘　　要：为帮助学生更好地理解频率解调的知识点,掌握不同的频率解调方案,设计了一套相位/比例鉴频综合实验电路。利用信号源产生调频波作为电路输入,通过选择开关实现比例鉴频器和叠加型相位鉴频器的灵活切换,达到两种电路形式有机结合的目的。通过鉴频功能、鉴频灵敏度以及限幅作用的测试与分析,深入探讨两种鉴频器的异同,实现理论和实践的融会贯通。教学实践表明,该实验效果良好,适用于本科实验教学、大学生科研和电子设计竞赛等多种场合。In order to help students better understand the knowledge of frequency demodulation and master different frequency demodulation schemes,a set of phase/proportional frequency discrimination comprehensive experimental circuit is designed.The frequency modulation wave generated by the signal source is used as the circuit input,and the flexible switching between the proportional frequency discriminator and the superimposed phase frequency discriminator is realized through the selection switch,so as to achieve the organic combination of the two circuit forms.Through the test and analysis of the frequency discrimination function,frequency discrimination sensitivity and amplitude limiting function,this paper deeply discusses the similarities and differences between the two frequency discriminators,so as to realize the integration of theory and practice.The teaching practice shows that the experiment has good effect and is suitable for many occasions,such as undergraduate experimental teaching,college students’scientific research and electronic design competition.

关 键 词：调频波 检波 鉴频 相频网络 实验教学 

分 类 号：TN761.2[电子电信—电路与系统] G642.423[文化科学—高等教育学]