目录
1 引 言.......................................................................................................................................................3
2 任务与要求............................................................................................................................................4
2.1 设计任务............................................................................................................................................4
2.2 设计要求............................................................................................................................................4
3 音频功率放大器的工作原理及组成....................................................................................................5
3.1 前置放大级........................................................................................................................................5
3.2 音调控制级........................................................................................................................................5
3.3 功率放大级........................................................................................................................................5
4 方案设计与选择....................................................................................................................................6
4.1 音调控制电路....................................................................................................................................6
4.1.1 方案比较........................................................................................................................................7
4.1.2 音调控制方案选择......................................................................................................................11
4.2 功率放大器......................................................................................................................................11
4.2.1 OTL 互补对称功率放大器..........................................................................................................11
4.2.2 用集成器件 TDA2030 实现.......................................................................................................12
4.2.3 基于 TDA2030 的双电源互补对称功放..................................................................................13
4.2.4 基于 TDA2030 的双电源桥式推挽互补对称功放..................................................................13
4.2.5 比较与选择..................................................................................................................................14
5 电路设计与参数计算..........................................................................................................................15
5.1 确定整机电路级数，分配各级电压增益......................................................................................15
5.2 前置放大电路的基本设计..............................................................................................................15
5.3 音调控制电路的基本设计..............................................................................................................16
5.4 功率放大级的基本设计..................................................................................................................18
5.5 整体电路图......................................................................................................................................19
6 输入输出波形仿真..............................................................................................................................19
6.1 波特图..............................................................................................................................................19
6.2 功放仿真波形情况..........................................................................................................................20
6.3 灵敏度测量......................................................................................................................................20
6.4 失真测量..........................................................................................................................................21
7 参考文献..............................................................................................................................................22
8 附录......................................................................................................................................................23
8.1 LM324N..........................................................................................................................................23
8.2 TDA2030........................................................................................................................................23
9 元件清单..............................................................................................................................................24
10 心得体会...........................................................................................................................................25
