Run-time Active Leakage Reduction by power gating and reverse body biasing: An eNERGY vIEW

Hao Xu, R. Vemuri, W. Jone
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引用次数: 21

Abstract

Run-time active leakage reduction (RALR) is a recent technique and aims at aggressively reducing leakage power consumption. This paper studies the feasibility of RALR from the energy aspect, for both power gating (PG) and reverse body bias (RBB) implementations.We develop two energy saving models for PG and RBB, respectively. These models can accurately estimate the circuit energy saving at any time, even when the circuit is in state transition. In PG modeling, we discover a physical phenomenon called ldquoinstant savingrdquo, which can affect the model accuracy by 30%-50%. Based on the RBB model, we derive the optimum design point of RBB for RALR. Finally in terms of energy saving, we define four figures-of-merit, to compare the efficacy of using PG and RBB to implement RALR.
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运行时主动泄漏减少功率门控和反向体偏置:一个能源的观点
运行时主动泄漏降低(RALR)是一项最新技术,旨在积极降低泄漏功耗。本文从能量方面研究了功率门控(PG)和反向体偏置(RBB)实现的rar的可行性。我们分别开发了PG和RBB两种节能模型。这些模型可以在任何时候,甚至在电路处于状态转换时,准确地估计电路的节能。在PG建模中,我们发现了一种称为ldquoinstant savingrdquo的物理现象,它可以影响30%-50%的模型精度。在RBB模型的基础上,推导出了RBB的最佳设计点。最后,在节能方面,我们定义了四个优值,以比较使用PG和RBB实现RALR的效果。
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