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Article 为什么纹波测量时噪音这么大?

在电源电路中测量纹波等小信号，需要尽量使测量回路缩小，避免环境中噪音引入，才能测量到干净的波形。如图所示：
在输出电容两端引出线缠绕在示波器探针的正负极。

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