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使用的DC/DC型号是LM20123
用示波器的交流耦合，20MHZ带宽，20MV/DIV，测量选择峰峰值查看，在1US/DIV的视窗下看纹波，只有10多个MV
但是把时间周期打长一点来观测纹波波形就有问题了
Hi
应该是测量的问题，建议看一下这个文档。5140.纹波测量.pdf
