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数字系统的电源去耦设计

作者：时间：2011-12-16 来源：网络

|Zmax|≥(VZmax/Imax) (2)

从电源到芯片的线路是5英寸长的16-AWG导线和4 英寸长、20mil宽的走线，它将提供100nH的电感。在某些频率f上，感抗将大于所能容忍的Zmax。这个频率将通过变换电感的阻抗方程得到：

fmax = |Zmax|/2πL (3)

在这个频率之上，C1不能提供足够的电压来满足器件所需的噪声裕量，信息也无法成功地传输。

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关键词：设计电源系统数字

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