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孙朝珊, 黄琨, 骆祖莹. 基于输入向量控制的衬底偏置技术面积优化方法[J]. 计算机辅助设计与图形学学报, 2010, 22(12): 2237-2241.
引用本文: 孙朝珊, 黄琨, 骆祖莹. 基于输入向量控制的衬底偏置技术面积优化方法[J]. 计算机辅助设计与图形学学报, 2010, 22(12): 2237-2241.
Sun Chaoshan, Huang Kun, Luo Zuying. Area Optimization Algorithm for Body Bias Technique Based on Input Vector Control[J]. Journal of Computer-Aided Design & Computer Graphics, 2010, 22(12): 2237-2241.
Citation: Sun Chaoshan, Huang Kun, Luo Zuying. Area Optimization Algorithm for Body Bias Technique Based on Input Vector Control[J]. Journal of Computer-Aided Design & Computer Graphics, 2010, 22(12): 2237-2241.

基于输入向量控制的衬底偏置技术面积优化方法

Area Optimization Algorithm for Body Bias Technique Based on Input Vector Control

  • 摘要: 随着集成电路工艺进入纳米时代,VLSI漏电功耗迅速增加,增加了实时功耗管理系统的面积开销.为了大幅度减小反向衬底偏置(RBB)控制管的面积,对广泛应用的RBB优化漏电流技术提出一种新方法.基于双阈值CMOS电路设计,在输入最小漏电流向量的条件下,仅将反向偏置电压VRBB加到处于决定态的低阈值电压MOS管上,通过大幅度减小应用VRBB的晶体管数量来降低VRBB控制管的面积开销.在基于22 nm工艺ISCAS85基准电路上与单纯RBB方法进行比较的实验结果表明,该方法以损耗27.94%的漏电功耗优化效果为代价,降低了84.91%的面积开销.

     

    Abstract: With the IC technology scaling into nanometer regime, leakage power increases rapidly in VLSI, enhancing the area overhead of dynamic power management system.Reverse body bias technique (RBB) is a common method to reduce the leakage power at run-time.To overcome the larger area overhead of controller applied on RBB, this paper proposes a novel method, which can reduce area overhead of controller substantially.Based on dual-threshold voltage CMOS designs, when the input vector is the minimum leakage pattern, this paper only applies VRBB to the Dominate Leakage State and low threshold voltage MOS transistors, visibly reducing the area overhead of the controller through bringing down the number of the transistors applied RBB.Based on a set of ISCAS85 benchmark circuits in a Predictive 22 nm process, experimental results draw the following conclusion.In comparison with naive RBB, our algorithm can reduce 84.91% area overhead at the cost of 27.94% leakage current penalty.

     

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