基于PLL信號(hào)發(fā)生器的設(shè)計(jì)資料

基于PLL信號(hào)發(fā)生器的設(shè)計(jì)資料,基于,pll,信號(hào)發(fā)生器,設(shè)計(jì),資料 基于PLL信號(hào)發(fā)生器的設(shè)計(jì)摘 要: 隨著無線通信技術(shù)的應(yīng)用和發(fā)展，對(duì)高質(zhì)量的高頻信號(hào)源要求日益迫切，這主要表現(xiàn)在對(duì)頻率的穩(wěn)定度和準(zhǔn)確度的要求越來越高，并且希望能方便地調(diào)整頻率。常見的信號(hào)產(chǎn)生方法很難滿足這些要求，如石英晶體振蕩器可以達(dá)到很高的頻率穩(wěn)定度，但是調(diào)整頻率困難；LC振蕩器調(diào)整頻率比較容易，但是頻率穩(wěn)定度和精度方面又達(dá)不到要求。而鎖相環(huán)頻率合成技術(shù)則可以同時(shí)滿足兩方面的要求。本設(shè)計(jì)正是基于這種技術(shù)來產(chǎn)生正弦波信號(hào)的，通過單片機(jī)控制頻率合成器，從而控制信號(hào)的輸出頻率。為了便于觀察頻率的變化，用數(shù)碼管監(jiān)測輸出頻率值并把當(dāng)前值送到存儲(chǔ)器存儲(chǔ)。此設(shè)計(jì)電路可以產(chǎn)生頻率穩(wěn)定度、精度高的正弦波。關(guān)鍵詞：鎖相環(huán) 單片機(jī) 存儲(chǔ)器The Design of Signal Generator Based on thePLL Abstract: With the application and development of wireless communication, it is demands for signal sources with high-quality and high-frequency;it is not only mainly reflected in the frequency stability and accuracy but also in hoping that the frequency could be easily adjusted. However, it is difficult to meet these demands by the common way generating signal source. For example, although quartz crystal oscillator can reach high stability of frequency, the adjustments of frequency is inconvenience; LC oscillator frequency adjustment is very convenient, But the stability and accuracy of frequency cant meet requirement. Compared with the methods above. phase locked loop frequency synthetic technology can meet all various aspects demands. The design is based on this technology to generate sine wave signal, frequency synthesizers is controlled by the Single Chip Microcomputer and controls the output frequency. In order to make convenience to observe the change of frequency, the system uses LED to monitor the output frequency and then send it to the memory devices. This design can generate sine wave with high stability and precision frequency.Keyword: Phase locked loop Single Chip Microcomputer Memory目 錄1引言12設(shè)計(jì)要求13 方案論證與比較14 系統(tǒng)組成25 鎖相環(huán)介紹36單元電路設(shè)計(jì)56.1壓控振蕩器56.2 鎖相環(huán)式頻率合成器的設(shè)計(jì)76.3低通濾波器 106.4電源切換電路設(shè)計(jì) 106.5 電源電路設(shè)計(jì)116.6 存儲(chǔ)電路設(shè)計(jì)116.7 電子控制單元電路（ECU）146.8 頻率測量顯示電路187 軟件設(shè)計(jì)198 測試結(jié)果219 結(jié)論22參考文獻(xiàn)23致謝24附錄1：程序25附錄2：總電路圖44英文資料及中文翻譯45