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TPA6120A2耳机开关时候popo-noise

Other Parts Discussed in Thread: TPA6120A2EVM

根据参考电路,只不过在输出39R电阻和耳机之间加有开关,系统正常后开关接通,关机前提前断开耳机,但是在开关通断的时候,耳机里有“啪”声,请问这个有没有类似案例和好的解决办法。

目前采用差分输入,输入电阻:360R,反馈电阻1K,电源+/-5V,纹波峰峰值<8mV ,输入底噪峰峰值15mV,输出底噪峰峰值110mV。似乎降增益,低输出对这个popo noise无效。

如果开关直接接别的音频信号比如电脑输出,开关通断时候无噪声。谢谢了