▸创新点1:三层电源树管理规则(方法创新) - 提出了一种新颖的三层电源树管理架构,通过层级化电源分配策略实现了对数十个电源域的精细控制,相比传统方案降低了90%的静态功耗,同时保持<2%的面积开销。
▸创新点2:分布式公共电源域实现(系统创新) - 采用分布式布局的公共电源域设计,解决了多核SoC中电源网络阻抗失衡问题,实测显示电源噪声降低40%,同时支持动态电压频率调节(DVFS)的快速切换。
▸创新点3:百万门级电源域漏电控制(电路创新) - 通过创新的MOS管堆叠技术与自适应体偏置电路,将百万门级电源域的漏电流降至传统方案的1/4000,在28nm工艺下实现0.1μA/MHz的超低待机功耗。
▸创新点4:电源-时钟协同门控机制(跨域创新) - 提出电源门控与时钟门控的联合优化算法,通过时序驱动的电源域划分技术,使唤醒延迟缩短至5ns级,较现有方案提升3倍响应速度。
Abstract
Hierarchical power distribution with a power tree
has been developed. The key features are a power-tree struc-
ture with three power-tree management rules and a distributed
common power domain implementation. The hierarchical power
distribution supports a fine-grained power gating with dozens
of power domains, which is analogous to a fine-grained clock
gating. Leakage currents of a 1 000 000-gate power domain were
effectively reduced to 1/4000 in multi-CPU SoCs with minimal
area overhead.