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如题
我在别的地方看到了这个audio放大电路,但应用在我这块板子上有底噪,HEAD_SP为输入,HEAD_EAR1为输出,输出接的是电话手柄的听筒。但查看了电路是没问题的。可否告知原因新建 DOC 文档 (4).doc