| Presentation | 2007-03-08 A Clock Deskew Method Using Statistical Presumption Naoki OTANI, Yuko HASHIZUME, Yasuhiro TAKASHIMA, Yuichi NAKAMURA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In deep-submicron technology, process variations can severely affect the performance and the yield of VLSI chips. As a countermeasure to the variations, deskew, which insert Programmable Delay Elements (PDEs) into the clock tree and adjust clock arrival times has been proposed. One of the previous deskew methods measures clock arrival times of all FFs and determines PDE delays by Linear Programming (LP). However, it is difficult to apply the method to practical problems, since the test cost to measure the clock arrival times of all FFs seems to be too high. In this paper, we propose a novel deskew method in which the arrival clock times of only small amount of FFs are measured and that of the rests are presumed under the assumption that process variation follows Gaussian distribution. Experiments show that our deskew method outputs the rate of the non-defective chips by measuring the arrival time of only 0.6% of FFs to improve as high as that by measuring the arrival time of all FFs. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Deskew / Programmable Delay Element (PDE) / Linear programming / Gaussian distribution |
| Paper # | VLD2006-126,ICD2006-217 |
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| Committee | ICD |
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| Conference Date | 2007/3/1(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Integrated Circuits and Devices (ICD) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Clock Deskew Method Using Statistical Presumption |
| Sub Title (in English) | |
| Keyword(1) | Deskew |
| Keyword(2) | Programmable Delay Element (PDE) |
| Keyword(3) | Linear programming |
| Keyword(4) | Gaussian distribution |
| 1st Author's Name | Naoki OTANI |
| 1st Author's Affiliation | Department of Infromation and Media Sciences, Faculty of Environmental Engineering() |
| 2nd Author's Name | Yuko HASHIZUME |
| 2nd Author's Affiliation | Department of Infromation and Media Sciences, Faculty of Environmental Engineering |
| 3rd Author's Name | Yasuhiro TAKASHIMA |
| 3rd Author's Affiliation | Department of Infromation and Media Sciences, Faculty of Environmental Engineering |
| 4th Author's Name | Yuichi NAKAMURA |
| 4th Author's Affiliation | Media and Infromation Research Labs., NEC Corp. |
| Date | 2007-03-08 |
| Paper # | VLD2006-126,ICD2006-217 |
| Volume (vol) | vol.106 |
| Number (no) | 551 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |