网络研讨会:PDN:损失可能是你的朋友,但电感是你的敌人

作者:Istvan Novak 对于高速信号而言,高频损耗通常被认为是我们想要最小化的不良副作用。 另一方面,直流损耗无关紧要,因为在许多高速信令方案中,我们有意阻止直流内容。在电源完整性方面,情况几乎相反:为了提供直流电源,我们希望最大限度地减少直流损耗,但同时我们不希望高频噪声沿配电网络传播。 因此,配电中的交流损耗通常是有帮助的。电感则不相同:虽然它存在于所有电流流动或可能流动的导电结构中,但在电源完整性方面,我们认为能在唯一情况下起到帮助,即电感在串联路径中作为有意低通滤波的一部分以便我们可以过滤噪音。在我们不需要电源滤波的应用中,增加的电感需要更多电容进行平衡。

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