無線調頻發射器

電子機電論文編號:JD990   論文字數:18065,頁數:31

 目  錄
 
 引言  1
    1  緒論  1
1.1 課題設計  1
 1.1.1課題設計原因  1
 1.1.2課題設計目的  1
 1.1.3課題設計目標  2
1.2 本文內容和組織結構  2
  2  硬件部分介紹  3
 2.1 調制部分  3
 2.1.1無線通信中的調制理論  3
 2.1.2BA1404F芯片介紹  3
 2.1.3硬件電路實現  6
 2.2 鎖相部分  6
    2.2.1鎖相環及其應用背景  6
    2.2.2BU2618FV芯片介紹  7
    2.2.3硬件電路實現  9
 2.3 電路的統一性  10
   2.3.1直流升壓電路  10
     2.3.2 VCO和LF實現完整的鎖相環  10
 2.4 電路的軟件實現  11
 2.5 系統的可靠性分析和抗干擾分析  12
   3  軟件部分介紹  14
       3.1 單片機應用系統設計  14
       3.2  MSP430單片機及其應用平臺  15
       3.3 應用程序設計及算法  18
           3.3.1低功耗實現  18
 3.3.2液晶驅動  20
 3.3.3時鐘部分  20
           3.3.4按鍵識別  22
           3.3.5對鎖相環頻率合成器的輸出控制 25
           3.3.6FLASH實現存儲功能  27
   4  總結與展望  29
 謝辭  30
 參考文獻  30
      附錄  31

摘  要 
 本課題通過綜合應用鎖相環（PLL）頻率合成器BU2618FV和單片機MSP430F112控制立體聲音樂集成芯片BA1404實現的無線調頻發射器。具有低功耗和數字發射頻率設置功能。微功耗單片機MSP430F112作為整個系統的控制核心對系統進行全局操作，將鎖相環頻率合成器的分頻比控制在所需要的范圍以實現發射頻率的數字化可調節,同時通過其低功耗特性實現整個系統的低功耗；鎖相環頻率合成器聯合外部電路VCO與低通濾波器共同組成鎖相環路，實現發射頻率的精確鎖定與手動可調節。立體聲音樂芯片對輸入樂音進行調頻發射，是一個完整的通信發端。系統的發射頻率范圍在88MHZ~108MHZ。通過天線將信號發射出去，并用收音機將信號進行接收驗證。本課題所研究的系統可以實現發射數據的存儲，并將發射頻率數據顯示于液晶上，實現可視化。應用直流電壓轉化芯片MC34063進行不同元件之間的電壓轉化，以保證整機供電的一體性。
 
 關鍵詞：調頻發射；BU2618FV；MSP430；BA1404；低功耗 
                            
  
 Abstract
 The aim of this discussion is about the sender of a wireless communication system. This discussion of problem is overpass by the application of the chips of frequency synthesize implement BU2618FV and micro controller single chip MSP430F112 to operate the sub system which dimensional sound music modulation chip BA1404 was used to modulate frequency of the input sound single. MSP430F112 is the core of the whole wireless system, it duty is to operate the whole system and made all the functions we set before come true. We use the micro controller to setup the divide ratio of the frequency synthesize BU2618FV. As the divide ratio was set, we can adjust the transmit frequency up and down just as one need. The frequency synthesize BU2618FV combined with two exterior circuits VCO and LF so it can build up a integrity Phase Locked Logic which made the transmit frequency locked and ensure us to control the transmit frequency more exactly and allow people to tune up the frequency by use hand. The dimensional sound music chip BA1404 modulate the input music single, this is a integrity communication system. It can run with ultra power low and set all with digital frequency, meanwhile, this system can also save data when power is off. This system can give the transmit frequency between 88MHZ and 108MHZ. By transmit the input single with antenna already, we then take over the single by using a wireless radiogram, while the single was received, this system was proved. In order to make this system more friendly, we also used the liquid glittering to show the transmit frequency. Appliance the DC-DC chip MC34063 to turn the voltage of different kind of elements up and down. By doing this way, this system can make sure our system with one criterion power supply only.
 
 Key words: FM; BU2618FV; MSP430; BA1404; ultra low power