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课程设计nRF401/nRF403 FSK 433MHz收发器电路设计 共27页，7985字
摘要
简要介绍基于nRF401/nRF403的无线数字收发电路的功能、内部结构、引脚排列及典型的应用电路。nRF401/nRF403是一个单片RF收发芯片，采用PPL频率合成技术，工作在433MHzISM频段和315MHz频段，具有FSK调制和解调能力。具有两个信号通道，可直接与微控制器接口。低工作电压（2.7V），外接一个晶体，电阻、电感元件就可以构成一个完整的射频收发器。电路模块尺寸适中，可以方便的嵌入各种测量和控制系统中。在多种测量、遥控技术中都有应用。
关键字： 收发器 射频 FSK调制
The synopsis introduction receives and dispatch the function, internal structure of electric circuit, leads feet alignment according to the nRF 401/nRF 403 wireless numerals and typical model of applied electric circuit. The nRF 401/nRF 403 is a single slice RF to receive and dispatch chip, adopt PPL frequency to synthesize a technique, work in the 433 MHzISM Pin segment and the 315 MHz Pin segment, have FSK to make to reach agreement the ability of adjust. Have two signal passages, can directly connect with tiny controller. Low work electric voltage(2.7 Vs)，Circumscribe a crystal、resistance、electricity component can constitute a radio frequency transceiver of integrity. Circuit mold piece the size be just right, can conveniently imbed various diagraph and control system . In the variety， measure and control from a distance to all have in the technique application.
Key word: Transceiver RF（Radio frequency） FSK modulation
目 录
1. nRF401/nRF403芯片简介--------------------------------------------4
2. nRF401/nRF403芯片主要性能指标------------------------------------4
2.1 芯片主要性能指标 -----------------------------------------------------4
2.2 二进制频移键控（2FSK）调制原理 ---------------------------------------5
3. nRF401/nRF403芯片封装与引脚功能 -----------------------------------------------------6
4. 内部结构与工作原理--------------------------------------------------------------------------------8
4.1 nRF403 内部结构方框图------------------------------------------------------------------------8
4.2 nRF403 工作原理---------------------------------------------------------------------------------9
5. 应用电路设计-----------------------------------------------------------------------------------------13
6. 应用电路实例---------------------------------------------------16
6.1无线数字温度传感器----------------------------------------------------16
6.1.1 温度测量电路----------------------------------------------------16
6.1.2无线收发电路------------------------------------------------------18
6.1.3．微控制器控制电路------------------------------------------------18
6.2 多机无线数据通信系统--------------------------------------------------18
6.2.1 系统结构---------------------------------------------------------18
6.2.2通信协议设计------------------------------------------------------21
6.3 无线抄表系统---------------------------------------------------------24
7. 总结------------------------------------------------------------27
参考文献---------------------------------------------------------------------------------------------------27