在研究DDS 算法的基礎(chǔ)上,結(jié)合SOC 控制技術(shù),設(shè)計(jì)了一種實(shí)現(xiàn)高精度和高穩(wěn)定度的
亞音頻輸出系統(tǒng).該系統(tǒng)結(jié)構(gòu)簡單,可靠性高，操作簡單，可廣泛應(yīng)用于無線電通信的各種場合．詳細(xì)介紹了DDS 算法和硬件設(shè)計(jì)原理，給出了電路原理圖，軟件設(shè)計(jì)原理及流程圖．
關(guān)鍵詞：CTCSS，DDS，頻率控制字
Abstract:On the basis of researching DDS algorithm, connected with the technolo gy of SOC, it designs a inferior audio frequency output system of high accuracy and high stability. The structure and the operating of this system are simple and the reliability is high. And it can widely used on kinds situation of no-l ine transmitter-receiver telecommunication. This article introduces the algorit hm of DDS and the principle of hardware design in detail and gives out the circ uit diagram、the principle of software design and the flow chart.
Keyword: CTCSS;DDS; Frequency control word