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TLV3501l输出的方波信号有抖动

Other Parts Discussed in Thread: TLV3501

电路图如下:

DAC_OUT是音频信号输入(DSP输出);TRI_OUT是384KHZ三角波输入;

当DSP无输出时(DAC_OUT是直流信号),输出应该是占空比一定的方波。

现在测试发现,输出方波占空比偶尔会变化,请帮忙分析一下,谢谢:

在上图TP17处测试,输出方波会有抖动