电源采用TPS7A4901将24V转到5V,然后通过ICL7660转到-5V。
原理图:
-5V的底噪如上图,但是+5V没有,所以想问一下各位大侠这是由什么引起的?
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谢谢您的回复,问题已解决,ICL7660是没有问题的,主要还是“地”引起的噪声!