文档介绍：调频对讲机调频系统的设计
摘要
近年来,电子工业发展非常惊人,当然这些进步都成了人类生活不可缺少的部分,1937年莫尔斯发明的有线电报开创了利用电传递信息的新时代。1876年贝尔发明的电话已成为我们日常生活中通信的重要工具,1918年,调幅无线广播条幅接收机问世,1936年,商业电视广播开播……伴随着人类的文明、社会的进步和科学技术的发展,电信技术也是以一日千里的速度飞速发展,而且无线通信在现在的生活中更是重要,我们常用的手机,无线电话还有各种电器的遥控器等,大到航天小到小孩玩具都离不开发射和接收设备。
调频与调幅是目前应用最广的两种发送接收方式,随着社会发展调频方式越来越成为现代设备的必要工作方式。超外差是目前很多接收机广泛采用的技术,与直接放大式接收机相比,超外差具有很多突出的优点。具有灵敏度好,易得到足够大且比较稳定的放大量,易调整等。
关键词:接收机超外差调频
I
abstract
In recent years, the electronics industry is very alarming, of course, these advances have e an indispensable part of human life, the 1937 cable Morse invented telegraph to create a new era for the use of electronic transmission of information. 1876 Bell invented the telephone has e an
important tool in our everyday munication, 1918, AM radio broadcasting banner e out in 1936, commercial television broadcasting programs ... along with human civilization, social progress and science and technology development of munications technology is also based on the rapid speed of the rapid development of munication is important in the present life, we often use mobile phones, wireless phones, there are a variety of electrical remote control, etc., a large space small children toys from development of radio and receiving equipment.
FM and AM is the most widely used of the two sending and receiving increasingly e the modern equipment necessary to work with the social development of FM mode. The superheterodyne many receivers are widely used technology, compared with the direct amplification receiver, superheterodyne has many outstanding advantages. Has good sensitivity, easy to get large enough and relatively stable put a lot of easy to adjust.
Keywords: receiver superheterodyne FM
II
目录
摘要................................................................ I ABSTRACT .............................................................. II
1 总体分析............................................................. 1
接收机的简述.................................................