NDLI: Post-silicon power characterization using thermal infrared emissions

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Post-silicon power characterization using thermal infrared emissions

Content Provider	ACM Digital Library
Author	Cochran, Ryan Reda, Sherief Nowroz, Abdullah Nama
Abstract	Design-time power analysis is one of the most critical tasks conducted by chip architects and circuit designers. While computer-aided power analysis tools can provide power consumption estimates for various circuit blocks, these estimates can substantially deviate from the actual power consumption of working silicon chips. We propose a novel methodology that provides accurate, detailed post-silicon spatial power estimates using the thermal infrared emissions from the backside of silicon die. We theoretically and empirically demonstrate the inherent difficulties in thermal to power inversion. These difficulties arise from measurement errors and from the inherent spatial low-pass filtering associated with heat diffusion. To address these difficulties we propose new techniques from regularization theory to invert temperature to power. Furthermore, we propose new techniques to compute the emissivities and conductances required for any infrared to power inversion method. To verify our results, a programmable circuit of micro heaters is implemented to create any desired power pattern. The thermal emissions of different known injected power patterns are captured using a state-of-the-art infrared camera, and then our characterization techniques are applied to invert the thermal emissions to power. The estimated power patterns are validated against the injected power patterns to demonstrate the accuracy of our methodology.
Starting Page	331
Ending Page	336
Page Count	6
File Format	PDF
ISBN	9781450301466
DOI	10.1145/1840845.1840914
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2010-08-18
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Thermal infrared emissions Power characterization
Content Type	Text
Resource Type	Article

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