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模拟功放的扑扑声问题?

Other Parts Discussed in Thread: TPA3110D2

模拟功放的收入端是一个射频芯片出来的数字信号进入DAC,然后输出到模拟功放中,听到有扑扑的声音,应该是地环路不好,想问一下,这样的情况下需要把

哪些地尽量连到一起,还有这种情况DAC输出的音频信号的电流是怎么流向?多谢!