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Yu Zhang, Zhenhua Jiang, X. Yu (2009)
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On-Chip Hybrid Power Supply System for Wireless Sensor Nodes WULONG LIU, YU WANG, and YUCHUN MA, Tsinghua University YUAN XIE, Pennsylvania State University HUAZHONG YANG, Tsinghua University With the miniaturization of electronic devices, small-size but high-capacity power supply systems appear to be more and more important. A hybrid power source, which consists of a fuel cell (FC) and a rechargeable battery, has the advantages of long lifetime and good load-following capabilities. In this article, we propose the schematic of a hybrid power supply system that can be integrated on a chip compatible with present CMOS processes. For the on-chip, fuel-cell-based hybrid power system in wireless sensor node design, we propose a two steps optimization: (1) dynamic power management (DPM), and (2) adaptive fuel cell optimal power point tracking (AOPPT). Simulation results demonstrate that the on-chip FC-Bat hybrid power system can be used for wireless sensor nodes under different usage scenarios. Our proposed DPM method can achieve 12.9% more energy savings than the method without DPM. Meanwhile, implementing our AOPPT approach can save about 17% energy compared with the fixed architecture for the fuel cell system. For an on-chip power system with 1cm2 area consumption, the wafer-level battery can
ACM Journal on Emerging Technologies in Computing Systems (JETC) – Association for Computing Machinery
Published: Apr 1, 2014
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