调幅信号处理实验电路应用设计与实现  

Amplitude-modulated signal processing circuit design and realization

作　　者：赵同刚[1] 张月[1] 潘大发 ZHAO Tonggang;ZHANG Yue;PAN Dafa(School of Electronic Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China)

机构地区：[1]北京邮电大学电子工程学院,北京100876

出　　处：《实验室科学》2020年第4期39-42,共4页Laboratory Science

基　　金：北京邮电大学教改项目(项目编号:2017JY01)。

摘　　要：通过摸索协同开展实验教学、竞赛活动,促进优秀创新人才成长的培养模式,北京邮电大学在专业课程实验内容建设做了大量改进。为了促进整体教学水平提高,每年将电子设计竞赛题目适合学科特点,综合性创新性强的实验题目都应用到本科日常必修环节。以2017年全国电子设计竞赛题目调幅信号处理电路为例,介绍了该题目设计思路与具体实施。系统主要包括本振源、低噪声放大、混频、中频滤波、AM解调、和基带放大器等模块。最后完成一个具有高输入动态范围的AM解调系统,达到题目的基本和发挥要求。实践表明,实践教学、竞赛培训统一协调管理的教学模式促进了学生整体实践能力的提高。In recent years,Beijing University of Posts and Telecommunications has made many improvements in the experimental curriculum by exploring the training mode of experimental teaching and promoting the growth of excellent students.In order to promote the education standards,we apply the National Undergraduate Electronics Design Contest'subjects which are suitable for discipline characteristics and have strong comprehensive and innovative ability to undergraduate compulsory courses.This paper takes 2017 National Undergraduate Electronics Design Contest'subjects,amplitude-modulated signal processing circuit,as example to introduce the design ideas and implementation.The main design system includes a local oscillator module,low noise amplification module,IF filter,AM demodulation and automatic gain control amplifier module.This design completes an AM demodulation system with high input dynamic range and achieve the basic and improved requirements.Practice has shown that the unified teaching mode of practice teaching and competition training promotes the students'comprehensive practical ability.

关 键 词：调幅信号 包络检波 自动增益控制 MSP430 

分 类 号：G482[文化科学—教育学]