| Presentation | 1997/7/24 All-Digital Multi-Phase DLL with ±60 ps Skew Resolution for High-Speed DRAMs Shigetoshi Wakayama, Kohtaroh Gotoh, Miyoshi Saito, Junji Ogawa, Hirotaka Tamura, Yoshinori Okajima, Masao Taguchi, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We proposed an all-digital multi-phase DLL for high speed DRAMs and estimated the performance of the DLL. It has two kinds of delay lines for coarse/fine adjustments consisting of logic-gate delay units which are digitally controlled to synchronize an external Clock with an internal clock. Multi-phase outputs can be generated by taking plural round trips of the clock signal in the coarse delay line. A fine skew adjustment resolution of 6ops is achieved by using the fine delay line. We confirmed that this DLL operated at up to 400MHz in four-phase output mode, and at up to 280MHz in six-phase output mode. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | DRAM / all-digital DLL, multi-phase / skew adjustment resolution / phase lock time |
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| Conference Information | |
| Committee | SDM |
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| Conference Date | 1997/7/24(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Silicon Device and Materials (SDM) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | All-Digital Multi-Phase DLL with ±60 ps Skew Resolution for High-Speed DRAMs |
| Sub Title (in English) | |
| Keyword(1) | DRAM |
| Keyword(2) | all-digital DLL, multi-phase |
| Keyword(3) | skew adjustment resolution |
| Keyword(4) | phase lock time |
| 1st Author's Name | Shigetoshi Wakayama |
| 1st Author's Affiliation | Fujitsu Laboratories Ltd.() |
| 2nd Author's Name | Kohtaroh Gotoh |
| 2nd Author's Affiliation | Fujitsu Laboratories Ltd. |
| 3rd Author's Name | Miyoshi Saito |
| 3rd Author's Affiliation | Fujitsu Laboratories Ltd. |
| 4th Author's Name | Junji Ogawa |
| 4th Author's Affiliation | Fujitsu Laboratories Ltd. |
| 5th Author's Name | Hirotaka Tamura |
| 5th Author's Affiliation | Fujitsu Laboratories Ltd. |
| 6th Author's Name | Yoshinori Okajima |
| 6th Author's Affiliation | Fujitsu Limited |
| 7th Author's Name | Masao Taguchi |
| 7th Author's Affiliation | Fujitsu Limited |
| Date | 1997/7/24 |
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| Volume (vol) | vol.97 |
| Number (no) | 195 |
| Page | pp.pp.- |
| #Pages | 7 |
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