【正文】 00309534 總體設(shè)計(jì)， 電路焊接與調(diào)試， 程序的編寫(xiě)，實(shí)驗(yàn)報(bào)告撰寫(xiě) 13917778872 宋新建 F1003015 5100309535 尋找電路元件， 實(shí)驗(yàn)報(bào)告撰寫(xiě) 18801906986 趙遠(yuǎn)祎 F1003015 5100309530 部分電路設(shè)計(jì)與焊接，資料查閱 13761655919 上海交通大學(xué) 電子信息與電氣工程學(xué)院 地 址：東川路 800 號(hào) 郵 編： 202040 摘 要： 本報(bào)告是關(guān)于我們小組對(duì)于單片機(jī)小系統(tǒng)及放大器的設(shè) 計(jì)與實(shí)際應(yīng)用的情況。其主要目的在于闡述我們小組如何通過(guò)運(yùn)用單片機(jī)，設(shè)計(jì)并實(shí)現(xiàn)了增益可程序化控制的放大器電路以及自動(dòng)增益控制放大電路。 關(guān)鍵詞： 單片機(jī) ， 可控增益放大器，自動(dòng)增益， UA741 運(yùn)算放大器 ABSTRACT This report is about our group’s designing and applying of the SCM. The main purpose is to illustrate how to design and acplish the programcontrolled gain amplication circuit and the automatic gain control amplification circuit. This report included our group’s whole planning, circuit designing, programming, material selection, circuit welding ， testing, function debugging and so on . In the end we also shared our prehension that we learned from this course and some deep discussion about problems we met during our work. KEYWORDS Signal generator Controllable gain amplifier Autocontrollable gain amplifier UA741 operational amplifier 第 1頁(yè) 上海交通大學(xué) 電子信息與電氣工程學(xué)院 目 錄 1. 概述 .........................................................................................................................................1 編寫(xiě)說(shuō)明 .........................................................................................................................1 名詞定義 .........................................................................................................................1 縮略語(yǔ) .............................................................................................................................1 2. 系統(tǒng)總體說(shuō)明 .........................................................................................................................2 課題任務(wù)規(guī)定的設(shè)計(jì)要求 .............................................................................................2 基本設(shè)計(jì)要求 ........................................................................................................2 具體要求 ................................................................................................................2 實(shí)際完成后的功能 .........................................................................................................2 系統(tǒng)的設(shè)計(jì)原理與分析 .................................................................................................2 系統(tǒng)的設(shè)計(jì)原理和總體結(jié)構(gòu) ................................................................................2 系統(tǒng)的功能 ............................................................................................................5 3. 系統(tǒng)的硬件結(jié)構(gòu) .....................................................................................................................6 硬件總體結(jié)構(gòu) .................................................................................................................6 增益可鍵控放大電路模塊 描述 ................................................................................6 功能描述 ................................................................................................................6 接口定義 ................................................................................................................6 技術(shù)要求 ................................................................................................................6 實(shí)現(xiàn)方式 ................................................................................................................6 自動(dòng)增益控制模塊 描述 ..........................................................................................10 概述 ......................................................................................................................10 電平轉(zhuǎn)換模塊 ......................................................................................................12 功能描述 .............................................................................................................12 接口定義 .............................................................................................................12 電壓比較模塊 ......................................................................................................15 ...............................................................................................................................................15 4. 系統(tǒng)的軟件結(jié)構(gòu) ...................................................................................................................17 軟件總體結(jié)構(gòu)和功能 ...................................................................................................17 第 2頁(yè) 上海交通大學(xué) 電子信息與電氣工程學(xué)院 重要的全局變量 ...........................................................................................................17 流程邏輯 .......................................................................................................................18 增益可鍵控放大電路模塊 描述 ..............................................................................21 功能描述 ..............................................................................................................21 輸入輸出項(xiàng)描述 ..................................................................................................21 數(shù)據(jù)結(jié)構(gòu) ..............................................................................................................21 調(diào)用函數(shù)說(shuō)明 ......................................................................................................21 算法 ......................................................................................................................22 自動(dòng)增益控制模塊 描述 ..........................................................................................22 增益的自動(dòng)控制 ......................................................................................................22 5. 系統(tǒng)功能及技術(shù)指標(biāo)測(cè)試 ...................................................................................................23 測(cè)試