手机的音频电路原理设计

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1 更多论文请加QQ 1634189238 492186520 摘要 本论文先分别论述了手机用麦克、耳机、蓝牙送话、受话、录音的原理,还论述了播放MP3、MIDI音、录音的原理,先从大体上分析了手机的音频原理。 接着以MOTO的经典机型E680为例,详细分析了手机的音频电路原理。 最后是关于手机音频的维修分析。 通过这次论文,在分析原理的基础上指导维修。 关键字:语音总线 PCAP集成芯片 龙珠(主CPU) NEP(从CPU)

Abstract This paper first describes respectively phone with Mike, headphone, Bluetooth sent, the subject, recording the principle, also outlined the play MP3, MIDI Music, the recording of principle, with the general on the phone audio principle. MOTO then to the classic models E680 for example, gave a detailed account of the phone audio circuit. Finally, with regard to the maintenance of cell phone audio analysis.

Keywords : Speech PCAP IC Bus 2

目录 第一章 绪论 ............................................................................................................................................................. 3 第二章 手机音频原理论述 ..................................................................................................................................... 4 2.1主MIC(麦克)的打电话原理 ...................................................................................................................... 4 2.2主听筒接电话原理 .......................................................................................................................................... 5 2.3普通录音原理 .................................................................................................................................................. 5 2.4 播放普通录音原理 ......................................................................................................................................... 6 2.5耳机送话原理 .................................................................................................................................................. 6 2.6 耳机受话原理 ................................................................................................................................................. 7 2.7 蓝牙打电话原理 ............................................................................................................................................. 7 2.8 蓝牙接电话原理 ........................................................................................................................................... 8 2.9 播放MP3原理 ............................................................................................................................................... 8 2.10 免提接电话原理 ........................................................................................................................................... 9 2.11 播放MIDI音原理 ........................................................................................................................................ 9 2.12收音机使用原理 ............................................................................................................................................ 9 2.13 E680音频原理总结 .................................................................................................................................. 10 第三章 音频电路原理的详细分析 ........................................................................................................................11 3.1 YAMAHA电路原理分析 ............................................................................................................................11 3.2收音机电路原理分析 .................................................................................................................................... 12 3.3 音频的路由选择 ........................................................................................................................................... 16 3.4 耳机电路原理分析 ....................................................................................................................................... 20 3.5蓝牙电路原理分析: ....................................................................................................................................... 22 第四章 音频故障维修分析 ................................................................................................................................... 23 4.1 无铃声故障 ................................................................................................................................................. 23 4.2收音机不能调台,无声音 .............................................................................................................................. 26 4.3无振铃,耳机无声 ........................................................................................................................................ 27 4.4 插耳机无收音机 ........................................................................................................................................... 28 第五章 总结 ........................................................................................................................................................... 32