目录1设计任务与要求·····················································································································································································································12方案设计与论证········································································································································23单元设计与参数计算··················································································································································································································104元件清单及总原理图·················································································································································135安装与调试························································································································································································································156性能测试与分析·······································································································································167结论与心得·····························································18参考文献································································:音频信号放大器,音调混响控制器,功率放大三个组成部分。、能进行音调控制调节、能对外接8Ω扬声器输出功率达1W的音响放大器。)输出功率:POM≥1W扬声器阻抗ZL==15V。2)输入阻抗Ri>,音响放大整机电路可分为话放与混放级、音调控制级与功放级。根据各级的功能及性能指标要求分配电压增益如下两种方案::各级增益大体均分,话放级增益5dB较小,主要任务解决输入信号的阻抗匹配。音调控制级主要任务是音调调节,虽然在电位器居中时增益为零,但在增益衰减调节时为-20dB;在增益提升调节时为20dB。由于普通运放的上限频率较低,增益较高则上限频率更低,因此采用运放驱动大功率管电路可采用此增益分配。:功放级电压增益较大,比较适用于集成功放电路及采用三极管驱动大功率管的功放电路。,为了使电路的输入阻抗匹配,话放
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