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Abstract
With greater integration of VLSI circuits, power consumption and power density
have increased dramatically resulting in high chip temperatures and presenting
a heat removal challenge. To effectively limit the high temperature inside a chip,
thermal specific approaches, besides low power techniques, are necessary at the
chip design level.
In this work, we investigate the power and thermal management of System-on-
Chips (SoCs). Thermal analysis is performed in a SPICE simulation approach
based on the electrical-thermal analogy. We investigate the impact of inter-
connects on heat distribution in the substrate and present a way to consider
temperature dependent signal delay in global wires at early design stages.
With the aim of reducing high local power density in hotspots, we propose two
placement techniques to spread hot cells over a larger area. The proposed methods are compared in terms of temperature reduction, timing and area overhead
to the general method, which enlarges the circuit area uniformly.
A case study analyzes the design of Floating Point Units (FPU) from an energy
and a thermal perspective. For the division operation, we compare different
implementations and illustrate the impact of power efficient dividers on the
energy consumption and thermal distribution within the FPU and the on-chip
cache. We also characterize the temperature dependent static dissipation to
evaluate the reduction in leakage obtained from the decrease in temperature.
Original language | English |
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Place of Publication | Kgs. Lyngby, Denmark |
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Publisher | Technical University of Denmark |
Publication status | Published - 2011 |
Series | IMM-PHD-2011-250 |
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Dive into the research topics of 'Power and Thermal Management of System-on-Chip'. Together they form a unique fingerprint.Projects
- 1 Finished
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Power and Thermal Management of System-on-chips
Liu, W. (PhD Student), Nannarelli, A. (Main Supervisor), Madsen, J. (Supervisor), Pop, P. (Examiner), Alonso, D. A. (Examiner) & Tisserand, A. (Examiner)
15/10/2007 → 01/06/2011
Project: PhD