基于电源、地桥的电源网络布线后优化

A Method to Optimize the IR-drop Distributed by P/G Bridge

随着集成电路规模的不断增大，电源网络的重要性日趋显著，电源网络的分布直接影响芯片的电压降（IR-drop）。一种布线后通过在空闲处插入电源桥和地桥的方法，可以在不增加芯片面积的情况下，改善IR-drop效应。实验结果表明在芯片布局利用率不高的情况下（70～75％），该方法可以使IR-drop得到明显的优化。

As the complexity of IC architecture keeps increasing, the PG network plays more and more important role in designs. The PG network can affect the distribution of IR - drop on chips directly. In the EDA tools such as Astro, PG bridges can he added to improve the IR- drop distribution. As reported by experiments, with the core utilization between 700% and 75 %, this method can improve the IR- drop distribution explicitly and cause no increase of the chip area.