功率门控技术中的分簇算法和控制电路

Clustering Algorithm and Controller in Power Gating

在当前的CMOS集成电路设计中,利用功率门控技术来降低静态功耗已经成为一种趋势。功率门控技术中,对电路进行分簇的算法和用来生成门控信号的控制电路是主要的设计部分。采用基于门的最大电流进行分簇的BOIG(Based on IMAXof Gate)算法和基于时间的功率门控控制电路,对ISCAS85系列的C432电路和ISCAS89系列的S1238电路进行了功率门控,并在性能、功耗和面积等方面进行了分析。结果表明,在满足性能的要求下,功耗降低了80%以上,面积有所增加。

Using power gating technique to reduce leakage power dissipation is a trend in integrated circuit design currently.The algorithm which partitions the circuit into clusters and the controller used to generate gating signal are main design concern in power gating technique.This paper presented an clustering algorithm based on IMAX of gate and a power gating controller based on time,then power gated the C432 in ISCAS85 and S1238 in ISCAS89.The paper also analyzed the performance,power dissipation and area, the results show that under the performance constraint the power dissipation is reduced by more than 80%, and the area increases a certain amount.