你好,我用的是DS90UB905芯片, 2层板,用示波器测地发现有几十M频率,很杂, 电源有用磁珠隔离,地有分模块接, 请问是哪里处理的不好!
This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.