基于乘法器的振幅调制实验特性研究

Experimental Characteristics of Amplitude Modulation Based on Multiplier

调制器是无线电发送设备的重要组成部分,振幅调制器实验是高频电子线路实验课程的最重要的必做实验之一。往往学生对振幅调制实验原理理解不够深刻,影响实验效果,所以,从教学角度进行基于乘法器的振幅调制实验特性研究有重要实际意义。分析了基于乘法器的振幅调制实验原理,探讨了用集成模拟乘法器实现普通调幅和抑制载波双边带调幅的方法与过程,研究了已调波与二输入信号的关系,并提出了实验注意事项和几点实验教学启示,为高校开设相关实验课程的教工和学生提供参考。

Modulator is an important part of radio transmitting equipment.Amplitude modulator experiment is one of the most important experiments in high frequency electronic circuit experiment course.Students often do not have a deep understanding of the experimental principle of amplitude modulation,which affects the experimental effect.Therefore,it is of great practical significance to study the experimental characteristics of amplitude modulation based on multiplier from the teaching perspective.The amplitude modulation experiment principle based on multiplier is analyzed.The method and process that the integrated analog multiplier is used to implement Ordinary amplitude modulation and suppressed carrier Double-Side Band amplitude modulation are discussed,and the relation between two input signal and the modulated wave is studied.Furthermore,some points of attention and some enlightenment of experiment teaching are put forward,which can provide reference for teachers and students who set up relevant experimental courses in colleges.