模擬電子技術課程設計報告

1、成績 課程設計報告 題 目 方波、三角波、正弦波信號 發(fā)生器設計 課 程 名 稱 模擬電子技術課程設計 院 部 名 稱 機電工程學院 專 業(yè) 10自動化 班 級 10自動化 學 生 姓 名 吉鈺源 學 號 1004104001 課程設計地點 C206 課程設計學時 1周 指 導 教 師 趙國樹 金陵科技學院教務處制目錄1、緒論······················

2、3;·················································

3、3;·······················3 1.1相關背景知識·························

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5、;······3 1.2課程設計目的··········································

6、·······································31.3課程設計的任務·········&

7、#183;·················································&

8、#183;··················3 1.4課程設計的技術指標·····························

9、;···········································32、信號發(fā)生器的基本原理····

10、3;·················································

11、3;·················4 2.1總體設計思路·······························

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13、;42.2原理框圖················································

14、83;······································43、各組成部分的工作原理·········&#

15、183;·················································&#

16、183;············5 3.1 正弦波產(chǎn)生電路···································&

17、#183;·········································5 正弦波產(chǎn)生電路······

18、3;·················································

19、3;·················5 正弦波產(chǎn)生電路的工作原理······························&#

20、183;····························6 3.2 正弦波到方波轉(zhuǎn)換電路··················

21、3;·················································7 正弦

22、波到方波轉(zhuǎn)換電路圖················································

23、83;·············7 正弦波到方波轉(zhuǎn)換電路的工作原理·································

24、3;················8 3.3 方波到三角波轉(zhuǎn)換電路·······························

25、·····································9 方波到三角波轉(zhuǎn)換電路圖···········

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27、;·9 方波到三角波轉(zhuǎn)換電路的工作原理··············································

28、····104、電路仿真結(jié)果············································&#

29、183;······································114.1正弦波產(chǎn)生電路的仿真結(jié)果········

30、83;·················································

31、83;···114.2 正弦波到方波轉(zhuǎn)換電路的仿真結(jié)果···········································

32、·········114.3方波到三角波轉(zhuǎn)換電路的仿真結(jié)果·····································

33、3;···············135、電路調(diào)試結(jié)果·································

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35、13 5.1正弦波產(chǎn)生電路的調(diào)試結(jié)果···············································

36、···············13 5.2正弦波到方波轉(zhuǎn)換電路的調(diào)試結(jié)果·······························

37、83;·····················14 5.3方波到三角波轉(zhuǎn)換電路的調(diào)試結(jié)果·························

38、····························146、設計結(jié)果分析與總結(jié)····················

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40、;····151、緒論1.1相關背景知識由于物理學的重大突破，電子技術在20世紀取得了驚人的進步。特別是近50年來，微電子技術和其他高技術的飛速發(fā)展，致使農(nóng)業(yè)、工業(yè)、科技和國防等領域發(fā)生了令人矚目的變革。與此同時，電子技術也正在改變著人們?nèi)粘Ｉ?。在電子技術中，信號發(fā)生器是一種能夠產(chǎn)生多種波形,如三角波、鋸齒波、矩形波（含方波）、正弦波的電路被稱為函數(shù)信號發(fā)生器。函數(shù)信號發(fā)生器在電路實驗和設備檢測中具有十分廣泛的用途，可以用于生產(chǎn)測試、儀器維修和實驗室，還廣泛使用在其它科技領域，如醫(yī)學、教育、化學、通訊、地球物理學、工業(yè)控制、軍事和宇航等。它是一種不可缺

41、少的通用信號源。1.2課程設計目的 通過本次課程設計所要達到的目的是：增進自己對模擬集成電路方面所學知識的理解，提高自己在模擬集成電路應用方面的技能，樹立嚴謹?shù)目茖W作風，培養(yǎng)自身綜合運用理論知識解決實際問題的能力。通過電路設計初步掌握工程設計方法，逐步熟悉開展科學實踐的程序和方法，為后續(xù)課程的學習和今后從事的實際工作提供引導性的背景知識，打下必要的基礎。1.3課程設計的任務 設計一個方波、三角波、正弦波函數(shù)發(fā)生器；能同時輸出一定頻率一定幅度的三種波形：正弦波、方波和三角波；用±12V電源供電；先對課程設計任務進行分析，及根據(jù)參數(shù)的確定選擇出一種最適合本課題的方案。在達到課題要求的前提

42、下保證最經(jīng)濟、最方便、最優(yōu)化的設計策略。然后運用仿真軟件Multisim對電路進行仿真，觀察效果并與課題要求的性能指標作對比。仿真成功后，用實物搭建電路，進行調(diào)試，觀測示波器輸出的波形。1.4課程設計的技術指標 設計、組裝、調(diào)試信號發(fā)生器；輸出波形：正弦波、方波、三角波；頻率范圍在10Hz10000Hz范圍內(nèi)可調(diào)；比較器用LM339,運算放大器用LM324，雙向穩(wěn)壓管用兩個穩(wěn)壓管代替。2、信號發(fā)生器的基本原理2.1 總體設計思路本次課程設計要求設計方波、正弦波、三角波函數(shù)發(fā)生器，產(chǎn)生正弦波、方波、三角波的方案，所以結(jié)合課本【1】所學知識，我將設計思路定位如下：先產(chǎn)生正弦波信號，然后通過整形電路

43、將正弦波變成方波，再由積分電路將方波變成三角波。其中，根據(jù)課本9.6RC正弦波震蕩電路可知RC正弦波震蕩電路有橋式振蕩電路、雙T網(wǎng)絡式和移相式振蕩電路等類型。這里主要采用橋式振蕩電路來產(chǎn)生正弦波，并采用二極管進行穩(wěn)幅，獲得穩(wěn)定輸出的正弦波。由課本電壓比較器得，過零比較器是單門限電壓比較器，即輸入電壓Vi每次過零時，輸出就要產(chǎn)生突然的變化，在高電位和低電位間相互切換，因而產(chǎn)生了方波。用集成運放構(gòu)成的電壓比較器可以用加限幅措施，避免內(nèi)部管子進入深度飽和區(qū)，來提高相應速度。方波的函數(shù)表示形式是常數(shù)函數(shù)，對常數(shù)函數(shù)進行積分則可以得到一次線性函數(shù)，用圖像表示為以直線，所以考慮到用積分電路將方波變?yōu)槿遣ā?.2 原理框圖 總體框架結(jié)構(gòu)示意圖： 積分電路整形電路三角波方波正弦波 已設計信號發(fā)生器模擬電路圖：產(chǎn)生三角波產(chǎn)生方波正弦波信號發(fā)生器 已設計信號發(fā)生器實物圖：3、各組成部分的工作原理 3.1正弦波產(chǎn)生電路 正弦波產(chǎn)生電路圖 正弦波產(chǎn)生電路的工作原理1.電路組成由上圖可知，正弦波由RC橋式振蕩電路。RC橋式振蕩電路由選頻網(wǎng)絡和放大電路組成。其