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自動增益控制放大系統(tǒng)設(shè)計畢業(yè)論文(已修改)

2025-09-10 11:45 本頁面
 

【正文】 本科畢業(yè)設(shè)計說明書 自動增益控制放大系統(tǒng) 設(shè)計 ON THE DESIGN OF AUTOMATIC GENERATION CONTROL 學(xué)院(部): 專業(yè)班級: 學(xué)生姓名: 指導(dǎo)教師: 年 月 日安徽理工大學(xué) 畢業(yè)設(shè)計 I 自動增益控制放大系統(tǒng) 設(shè)計 摘 要 自動增益控制電路已廣泛用于各種接收機、 錄音機和信號采集系統(tǒng)中,另外在光纖通信、微波通信、衛(wèi)星通信等通信系統(tǒng)以及雷達、廣播電視系統(tǒng)中也得到了廣泛的應(yīng)用。 本課題主要研究應(yīng)用于音頻放大的前級電壓放大,因此設(shè)計的電路需容納的頻帶范圍應(yīng)較寬,以至于使語音信號通過。由于語音信號的頻帶范圍為 300hz3400hz,所以該電路所應(yīng)設(shè)計的頻帶范圍應(yīng)在 300hz3400hz 之間,并且電路應(yīng)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的倍數(shù),信號弱時自動增大放大器的倍數(shù),從而實現(xiàn)音量的自動調(diào)節(jié)。 本課題介紹了自動增 益控制的概念原理以及自動增益控制放大 系統(tǒng) 各部分的工作原理,最后對系統(tǒng)的測試結(jié)果以及設(shè)計與實現(xiàn)中應(yīng)該注意的問題也做了詳細分析。 關(guān)鍵詞: 放大器;自動增益控制; 電壓跟隨器; 濾波器 安徽理工大學(xué) 畢業(yè)設(shè)計 II ON THE DESIGN OF AUTOMATIC GENERATION CONTROL ABSTRACT The automatic gain control electric circuit has been widely used in all kinds of receivers、 tape recorders and signal gathering systems, and also been used in munications system radar, the broadcast television system and optical fiber munications, microwave munications, satellite munications. This topic mainly studies to the applies to the front level voltage amplification of the audio frequency amplification, therefore the frequency band scope of the electric circuit should be wider that can make the 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(xué) 畢業(yè)設(shè)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(shè)計 .................................... 5 方案選擇 ........................................................... 5 壓隨器工作原理 .
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