自動增益控制放大系統(tǒng)設計(畢業(yè)論文)-展示頁
2024-09-08 21:57本頁面
【正文】 pronunciation signals to pass. Because the frequency band scope of the pronunciation signal is 300 Hz3400 Hz, so the frequency band scope of our electric circuit should be designed within 300 Hz3400 Hz. And the electric circuit should realize the closed loop adjustment which increases, it may realize the automatic control through this electric circuit which increases when the tonic train signal is strong automatically that it can reduce the multiple of the amplifier, and when the signal is weak that it can automatically increase the amplifier the multiple, so that can realize the volume with automatic control. This topic also introduced in the concept principle of the automatic gain control as well as to automatically increases the system every part of principle of work the detailed introduction, and it pays attention to the question to the test result of this system .Finally we have make some analysis to the design. KEYWARDS： Amplifier； Automatic Gain Control； AGC； Voltage follower； Filter 安徽理工大學 畢業(yè)設計 目 錄 摘 要 .................................................................... I 第 1 章 引言 ............................................................ 1 第 2 章 自動增益控制 .................................................... 2 自動增益控制 ....................................................... 2 自動增益控制電路（ AGC）存在的意義 ............................ 2 自動增益控制的基本概念 ....................................... 2 自動增益控制的原理 ........................................... 2 自動增益控制放大器 ............................................. 4 本課題的研究內(nèi)容 ............................................... 4 第 3 章 自動增益控制放大器的電路設計 .................................... 5 方案選擇 ........................................................... 5 壓隨器工作原理 ..................................................... 7 整流電路工作原理 ................................................... 7 濾波電路工作原理 ................................................... 8 增益控制工作原理 ................................................... 8 電路元器件選擇 ..................................................... 9 運算放大器 ................................................... 9 場效應管選擇 ................................................ 10 其他元器件選擇 .............................................. 10 第 4 章：放大器電路的調(diào)試及實驗結果 ....................................... 12 放大器電路的 調(diào)試 .................................................. 12 實驗結果及存在問題 ................................................ 16 總結 ..................................................................... 17 致謝 ..................................................................... 18 參考文獻 ................................................................. 19 附錄 ..................................................................... 20 元器件列表 ........................................................... 20 仿真原理圖 ........................................................... 21安徽理工大學 畢業(yè)設計 1 第 1 章 引言 隨著微電子技術、計算機網(wǎng)絡技術和通信技術等行業(yè)的迅速發(fā)展，自動增益控制電路越來越被人們熟知并且廣泛的應用到各個領域當中。由于語音信號的頻帶范圍為 300hz3400hz,所以該電路所應設計的頻帶范圍應在 300hz3400hz 之間，并且電路應該實現(xiàn)增益的閉環(huán)調(diào)節(jié)，通過此電路可以實現(xiàn)增益的自動調(diào)整，以至于使音頻信號強時自動減小放大器
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