【摘要】 分析了交替分布、非交替分布和成对分布的3种类型电源网络的电感随频率变化特性.由计算结果知,网络的回路电感随信号频率的增加呈下降趋势.交替分布的电源网络的电感受频率变化的影响较小;成对分布的电源网络的回路电感最小.电源网络频率特性的分析结果对设计阻抗较小的网络以减小电源噪声提供了相应的理论依据.通过对电源网络电感引起的delta- 噪声进行电路仿真后发现,尽管芯片内电源网络的分布电感与封装部分电感相比较小,但随着信号频率的不断提高,它所产生的电压噪声已经不能被忽略.更多还原

【Abstract】 The variation of inductance with frequency in power grids of high-speed integrated circuits was discussed. Three types of power grids were analyzed. It can be seen from the computation results that the inductance of power distribution grids decreases with signal frequency. The decrease in the inductance of interdigitated grids is relatively small and the inductance of paired grids is the smallest, which is useful for the design of low impedance power grids to decrease power noise. Due to the increase of signal frequency, the delta-Ⅰ noise induced by on-chip inductance becomes more important in the analysis of simultaneous switching noise. Although the inductance of the power grid is much smaller than the package inductance, the power-supply noise contributed by the on-chip inductance can not be neglected any more, which can be seen from the circuit simulation.更多还原