文档介绍：单工无线呼叫通信系统
【摘要】单工无线呼叫系统具有使用简单、不受网络限制、通话成本低、适用范围广等优点。它是在鉴频、混频等技术的基础上,利用无线电通信原理研发的一种通信方式。目前,人们对对讲机的研究已从模拟化转化为数字化。本文从无线对讲机的基本原理出发,并对各部分的功能和作用进行了分析和研究,确定了对讲机电路图。
本系统的功能在于实现呼叫和通话功能。无线对讲电话的特点是可供小型单位作内部电话使用,此外由于采用成品无线模块,从而使制作变得很简单,成本也很低。对讲电话实现了内部的通话,为人们的日常生活带来了极大的方便,值得进一步推广,有很好的发展前景。电子技术的研究才刚刚开始,随着这项技术的研究逐渐深入,涉及的研究领域也将更广。希望这项技术的研究能为人们以后的生活、工作带来更大的便利,为人们提供更为舒适、完美的生活方式。本论文最后对对讲机的现状及发展前景进行分析。
【关键词】无线呼叫调频发射振荡电路
Transitions wireless munication system
[Abstract] pick transitions have use wireless call system simple, not affected work restrictions, call low cost, wide application, etc. It is popularly used in frequency mixing technology, on the basis of using munication principle of a kind munication research. At present, people on the research has from MoNiHua into digital. This paper based on the basic principle of wireless radio, and part of the function and effect are analyzed and studied, determines the diagram.
The function of this system is to realize call and call functions. The characteristics of wireless talkback telephone is available for small units for internal use, moreover due to the telephone finished product, thus make make wireless module es very simple, the cost is low. Talkback telephone calls, realized the internal for People's Daily life has brought great convenience and deserves further promotion, have very good prospects for development. Electronic technology research is just beginning, as the technology research, involving gradually goes deep research realm will be more widely. Hope this technology research for people later life, work bring greater convenience, to provide people with fortable and perfect way of life. This paper finally to current situation and development prospect were analyzed.
[key words] wireless close call FM launch
目录
目录 4
1 绪论 6
无线对讲的功能 6
单工无线对讲的概述 8
简易调频发射与接收 11
石英振荡的调频发射与接收 11
采用PLL接收的无线通信 11
12
2 设计方案 13
设计方案 13
发射部分电路设计方案 14
方案一:电容三点式 14
方案二:电感三点式 15