Adaptive Performance Compensation With In-Situ Timing Error Predictive Sensors for Subthreshold Circuits
Adaptive Performance Compensation With In-Situ Timing Error Predictive Sensors for Subthreshold Circuits
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DOI：
10.1109/tvlsi.2010.2101089
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发表时间：
2012-02-01
影响因子：
2.8
通讯作者：
Onoye, Takao
中科院分区：
文献类型：
--
作者：
Fuketa, Hiroshi;Hashimoto, Masanori;Onoye, Takao
我们提出了一种自适应技术，使用“金丝雀触发器（FF）”来补偿亚阈值电路中的制造和环境变化，该技术可以预测时序误差。 32 位 Kogge-Stone 加法器的性能由体偏置控制，采用 65 nm CMOS 工艺制造。测量结果表明，与采用保护带的最坏情况设计和操作相比，自适应控制可以补偿工艺、电源电压和温度变化，并将亚阈值电路的能效提高高达 46%。我们还讨论了如何确定设计参数，例如金丝雀 FF 的插入位置和缓冲延迟，假设有两种方法：设计阶段的配置和硅后调整。
We present an adaptive technique for compensating manufacturing and environmental variability in subthreshold circuits using "canary flip-flop (FF)," which can predict timing errors. A 32-bit Kogge-Stone adder whose performance was controlled by body-biasing was fabricated in a 65-nm CMOS process. Measurement results show that the adaptive control can compensate process, supply voltage, and temperature variations and improve the energy efficiency of subthreshold circuits by up to 46% compared to worst-case design and operation with guardbanding. We also discuss how to determine design parameters, such as the inserted location and the buffer delay of the canary FF, supposing two approaches: configuration in the design phase and post-silicon tuning.