| US 7,349,167 B2 | ||
| Utilizing track identification fields for timing recovery | ||
| Mehmet Fatih Erden, Pittsburgh, Pa. (US); Richard Lyle Keizer, Minnetonka, Minn. (US); Timothy Francis Ellis, Tonka Bay, Minn. (US); and Alexei Hiram Sacks, Edina, Minn. (US) | ||
| Assigned to Seagate Technology LLC, Scotts Valley, Calif. (US) | ||
| Filed on Jul. 27, 2005, as Appl. No. 11/190,324. | ||
| Prior Publication US 2007/0025003 A1, Feb. 01, 2007 | ||
| Int. Cl. G11B 5/02 (2006.01); G11B 5/09 (2006.01) | ||
| U.S. Cl. 360—29 [360/51; 360/77.08] | 18 Claims |
| 1. An apparatus comprising:
a data storage medium having a plurality of servo sectors and a plurality of data sectors, wherein each of the servo sectors
includes a phase locked loop field and a track identification field, wherein the track identification field includes a plurality
of gray coded bits for each of a plurality of tracks with the least significant bit in each track being identical;
a controller for controlling the position of a recording head with respect to the data storage medium; and
a servo demodulator for recovering timing information from both the phase locked loop field and the track identification field,
wherein the least significant gray code bit in each of the plurality of tracks is used in recovering timing information from
the track identification field, and the servo demodulator further producing a timing estimate.
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