It presents the causes of the normal-model noise and common-model noise of the switching mode power supply and methods to restrict the noises.

介绍开关电源的常态噪声和共态噪声产生的原因，以及几种抑制噪声的方法。

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Using the model, noise caused by the two types flow is simulated, compared and analyzed, and there is a good agreement between the theoretical results and test results.

利用这一模型，对两种不同类型的车流噪声进行了模拟计算及对比分析，实测结果与模拟结果吻合较好。

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Using the model, noise caused by the two types flow is simulated, compared and analyzed, and there is a good agreement between the theoretical results and test results.

利用这一模型，对两种不同类型的车流噪声进行了模拟计算及对比分析，实测结果与模拟结果吻合较好。

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