| Presentation | 1993/5/19 Time domain measurement of disk eccentricity and its application for PLL phase accuracy improvement Itaru Tomisaki, Satoru Seko, Toru Takeda, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Phase accuracy of Phase Locked Loop for Pre-Embossed Rigid Magnetic disk has been dramatically improved and demonstrated. Eccentricity caused by clamping preformed-track disk to spindle axis is measured and memorized by built-in-drive circuit.PLL phase error caused by eccentricity is compensated by feed-forward control for the VCO,and residual phase error is suppressed by conventional closed loop.This method employs only 40MHz-3-bit counter as measurment section,and less than 1 K Byte table for feed forward control.Achieved measurement resolution and residual phase error are 1.2 ns and less than 5 ns(pp),respectively. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | pre-embossed magnetic disk / eccentricity / measurement on time domain / feed-foward compensation |
| Paper # | MR93-1 |
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| Conference Information | |
| Committee | MR |
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| Conference Date | 1993/5/19(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Magnetic Recording (MR) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Time domain measurement of disk eccentricity and its application for PLL phase accuracy improvement |
| Sub Title (in English) | |
| Keyword(1) | pre-embossed magnetic disk |
| Keyword(2) | eccentricity |
| Keyword(3) | measurement on time domain |
| Keyword(4) | feed-foward compensation |
| 1st Author's Name | Itaru Tomisaki |
| 1st Author's Affiliation | Applied Magnetic Research Department Corporate Research Laboratories,Sony() |
| 2nd Author's Name | Satoru Seko |
| 2nd Author's Affiliation | Applied Magnetic Research Department Corporate Research Laboratories,Sony |
| 3rd Author's Name | Toru Takeda |
| 3rd Author's Affiliation | Applied Magnetic Research Department Corporate Research Laboratories,Sony |
| Date | 1993/5/19 |
| Paper # | MR93-1 |
| Volume (vol) | vol.93 |
| Number (no) | 29 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |