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当前我采用示波器采集电脑USB电源噪声，通过某个AD芯片采集，AD内部电源或基准源电压，输出数字信号至上位机，曲线显示。
有没有好的测试与降噪办法，最好可以降到uA级别，目前我测到的是几百uA，怎么降到更低？
