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- W2021918087 abstract "Power Gating (PG) and Body Biasing (BB) are effective schemes to save leakage power in standby-time. However, in run-time, their large overhead energy and latency for sleep control prevent the circuit from saving power in short idle times. To reduce those overheads, advanced PG and BB using shallow sleep mode are studied. Those circuits achieve leakage saving even in short idle time. The depth of sleep mode has trade-offs between the overheads and the amount of saved leakage power; hence, making decision of depth of a shallow sleep is an important issue to maximize total leakage saving. However, the depth which achieves best leakage saving depends heavily on run-time factors, such as application behavior and temperature. Thus, the conventional circuit has multiple shallow sleep modes and chooses an adequate mode in run-time. However, it causes large overhead power because of additional voltage generators for shallow sleep modes. In this paper, we propose a sleep control scheme named Opt-static for run-time leakage saving. Our scheme uses only one shallow sleep mode, but its depth is reconfigurable. It successfully achieves leakage saving by adopting its depth with run-time factors. In addition, our scheme needs only one active voltage generator; hence overhead power associated with voltage generators is smaller than the conventional circuit which has multiple shallow sleep modes. Experimental results show that our schemes applied to Multi-mode PG achieves higher leakage saving than the conventional Multi-mode PG which has two shallow sleep modes, although it does not take into account for overhead power of voltage generators." @default.
- W2021918087 created "2016-06-24" @default.
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- W2021918087 date "2012-03-01" @default.
- W2021918087 modified "2023-10-01" @default.
- W2021918087 title "Efficient leakage power saving by sleep depth controlling for Multi-mode Power Gating" @default.
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- W2021918087 doi "https://doi.org/10.1109/isqed.2012.6187558" @default.
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