正弦信號發生器

電氣自動化論文編號:ZD871    論文字數:14301,頁數:40

目 錄
第1章  緒論........................................................1
 1.1 課題背景....................................................1
 1.2 國內外波形發生器的發展現狀 ................................1
 1.2.1 波形發生器的發展狀況 ....................................1
 1.2.2 國內外波形發生器產品比較 ................................3
 1.2.3 研究波形發生器的目的及意義................................3
第2章  DDS理論介紹 ..............................................5
 2.1 頻率合成技術 ..............................................5
 2.1.1 頻率合成技術的發展及分類 ............................ .....5
 2.1.2 頻率合成技術的技術指標....................................6
 2.2 DDS的原理和結構 ...........................................6
 2.2.1 DDS的原理 ..............................................6
 2.2.2 DDS的基本結構 ...........................................9
第3章  設計方案論證 .............................................12
 3.1 直接利用單片機實現方案 ...................................12
 3.2 利用單片集成芯片實現方案 ...............................12
 3.3 采用高性能DDS單片電路的解決方案 ......................13
 3.4 三種實現方案的比較 ....................................13
第4章  SPCE061A單片機簡介 ......................................14
 4．1 SPCE061A單片機概述 ......................................14
 4.2 SPCE061A 結構 .............................................15
 4.3 61板接口說明 .............................................17
 4.4 信號發生的原理 ..........................................18
 4.4.1 信號發生電路原理 ...................................18
 4.4.2 信號分析與計算 ......................................19
第五章  系統硬件電路 .............................................20
 5.1 系統硬件...................................................20
 5.2按鍵電路...................................................20
第六章  系統軟件設計.............................................. 21
 6.1 程序設計語言與軟件開發環境 ............................... 22
 6.2 輸入識別部分 .......................................22
 6．3 主程序流程圖 .........................................23
 6．4　分塊程序流程..............................................24
 6．4．1按鍵控制部份 ..........................................24
6．5  正弦波形的形成 ..........................................25
第7章 設計總結....................................................29
致謝..............................................................30
參考文獻..........................................................31
附錄1 
附錄2 

摘要

 信號發生器是一種常用的信號源，廣泛應用于電子電路、自動控制和科學試驗等領域。它是一種為電子測量和計量工作提供符合嚴格技術要求的電信號設備。因此，信號發生器和示波器、電壓表、頻率計等儀器一樣是最普通、最基本的，也是應用最廣泛的電子儀器之一，幾乎所有的電參量的測量都需要用到信號發生器。
 直接數字式頻率合成技術DDS是新一代的頻率合成技術，它采用數字控制信號的相位增量技術，具有頻率分辨率高，頻率切換快，頻率切換時相位連續和相位噪聲低以及全數字化易于集成等優點而被廣泛采用。
 本系統設計一個正弦信號發生器，使用凌陽公司的16位單片機SPCE061A，因其功耗低，超小型，低成本，功能完整，非常適用于便攜式儀表和就地式顯示控制儀表，在國內越來越受到用戶的重視和廣泛的應用。SPCE061A單片機功能強大,其片內含有八路十位A/D轉換器和兩路D/A轉換器，該波形發生器運用單片機技術，通過巧妙的軟件設計和簡易的硬件電路，產生數字式的正弦波。信號頻率，可通過鍵盤輸入，并顯示。與現有各類型波形發生器比較而言，產生的數字信號干擾小，輸出穩定，可靠性高，特別是操作簡單方便，人機界面友好，成本低，非常適合于物理實驗室教學與實驗使用。

關鍵字：正弦信號；DDS技術；SPCE061A

 Abstract

 Signal generator is a common source of the signal, widely used in electronic circuits, automatic control and scientific experiments, and other fields. It is a measurement of electronic measurement and work to meet stringent technical requirements of the signal equipment. Therefore, signal generators and oscilloscopes, voltage meter, such as the frequency of the same equipment is the most common and most basic is the most extensive application of electronic devices, almost all the parameters, the measurement will need to use signal generator.
 Direct Digital Synthesis techniques DDS is the next generation of frequency synthesis technology, using digital control signals in the incremental phase, with high frequency resolution and fast switching frequency, frequency switching phase for phase noise and low As well as digital and easy to integrate the advantages that are widely used.
 The system design of a sine wave generator, using the company's 16 Sunplus SCM SPCE061A, because of their low power consumption, ultra-small, low-cost, full-featured, very applicable to portable instrumentation and control instruments showed that the spot-in China has received increasing attention and users of a wide range of applications. SPCE061A SCM powerful, eight-way chip containing 10 A / D converter and two D / A converters, the waveform generators use SCM technology, through clever software design and simple hardware circuit, a The digital sine wave. Signal frequency, through the keyboard input, and display. And various types of existing waveform generator comparison, the small number of signal interference, output stability, high reliability, in particular the operation of simple, friendly interface and low cost, very suitable for teaching and experimental physics laboratory use.

Keyword: sine signal；DDS technology；SPCE061A.