中夏ZX2025立体声功率放大器的设计实训报告.docVIP

武汉理工大学《模拟电子技术基础》课程设计 PAGE 1 附件1： 学 号： 0120909330232 课 程 设 计 时间安排： 1、 2011年1月12日分班集中，布置课程设计任务、选题；讲解课设具体实施计划与课程设计报告格式的要求；课设答疑事项。 2、 2011年1月13日 至2011年1月19日完成资料查阅、设计、制作与调试；完成课程设计报告撰写。 3、 2011 年1月21日提交课程设计报告，进行课程设计验收和答辩。 指导教师签名： 年 月 日 系主任（或责任教师）签名： 年 月 日 目 录 摘要······················································5 1集成功放的设计········································6 2设计目的及主要任务····································8 2.1设计目的··········································8 2.2 设计任务及主要技术指标···························8 3.工作原理分析·······························8 4方法设计与论证········································9 4.1电源设计······································9 4.2功放设计··········································9 4.2.1方案一、A的BTL电路 4.2.2方案二、A的OCL电路 4.2．3方案三、 A的OTL电路 5.单元电路设计与参数计算·····························12 5.1．电源部分············································12 5.2 功放部分·········································13 5.2.1电源输入端电容的选取 5.2.2音频输入端电阻电容的计算 5.2.3反馈电阻电容的计算 5.2.4输出电容电阻的选取 5.2.5两个二极管的作用 6、安装与调试··········································14 6.1数据计算·····················14 6.2输出电压波形图及功率表····························14 6.3频率响应测试······································15 7.电路的仿真···········································15 7.1 仿真原理图·······································15 7.2仿真效果图········································15 8.元件清单·············································16 8.1电源清单··········································16 8.2功率放大器的清单··································17 9、心得与体会···········································17 10附录··················································18 11.参考文献·············································20 摘要 本设计主要由电源部分、音调控制级、功率放大级三部分组成。它的作用主要是放大音频信号。为了保证功放效果，电路采用作为功放IC，因为它具有失真小、功率大、外围元件少、开机冲击极小、内含各种保护电路、保真度高等优点。 功放，可以说是各类音响器材中最大的一个家族了，其作用主要是将音源器材输入的较微弱信号进行放大后，产生足够大的电流去推动扬声器进行声音的重放。 特别的，功率放大电路所需的元件很少，制作简单，效果良好。用它来做电脑有源音箱的功率放大部分或MP4等小型功放再合适不过。 信号流程：音频