制作微型调频发射机

How To Make Micro Frequency Modulation Emitting Machine

本文介绍了微型调频发射机的一种制作方法及其工作原理。在微型发射机中 ,话筒将话音转化为音频信号 ,音频信号经放大后对载波进行调制 ,产生调频波 ,通过天线向外发射调频电磁波。

This paper introduces a method of making micro frequency modulation emitting machine as well as work principle of the machine.In this machine,the microphone transforms the sound into the audio fre-quencysignal.Afterbeingamplified,the audio frequencysignal modulates the carrywave to produce frequen-cy modulation wave.Then the antenna emits the frequency modulation electromagnetic wave outwardly.Us-ing the frequency modulation radio,you can hear the clear sound.