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开关电源的纹波电压波形



正在调试一款开关电源产品。

带1A载时的纹波电压和开关管漏源电压波形如下:

这个纹波上出现2种周期波,是随着开关管的开通和关断过程而产生的?

这种纹波波形是不是很典型?