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Dynamic Voltage Scaling (DVS) Considering the DC-DC Converter in Portable Embedded Systems  

Choi, Yong-Seok (School of Computer Science and Engineering, Seoul National University)
Chang, Nae-Hyuck (School of Computer Science and Engineering, Seoul National University)
Kim, Tae-Whan (School of Electrical Engineering, Seoul National University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.44, no.2, 2007 , pp. 95-103 More about this Journal
Abstract
Dynamic voltage scaling (DVS) is a well-known and effective power management technique. While there has been research on slack distribution, voltage allocation and other aspects of DVS, its effects on non-voltage-scalable devices has hardly been considered. A DC-DC converter plays an important role in voltage generation and regulation in most embedded systems, and is an essential component in DVS-enabled systems that scale supply voltage dynamically. We introduce a power consumption model of DC-DC converters and analyze the energy consumption of the system including the DC-DC converter. We propose an energy-optimal off-line DVS scheduling algorithm for systems with DC-DC converters, and show experimentally that our algorithm outperforms existing DVS algorithms in terms of energy consumption.
Keywords
DVS(Dynamic voltage scaling); DC-DC converter; low power; scheduling algorithm;
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