Disk drive apparatus and method for generating servo sector...

Details Disk drive apparatus and method for generating servo sector... Disk drive apparatus and method for generating servo sector...

2005-01-04

2005-01-04

Tran, Sinh (Department: 2651)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data clocking

C360S078140, C360S077080, C360S049000, C360S048000, C360S098010, C360S078090, C369S043000, C369S044250, C369S044260, C369S044310, C369S044340

Reexamination Certificate

active

06839194

ABSTRACT:
A servo mark detector detects a servo mark from each servo information item detected by the servo detector. A counter measures a time period each time a servo mark is detected, thereby measuring a servo interval. A correction circuit corrects a time period T2on the basis of the measured servo interval and an ideal servo interval. A determination circuit determines which one of the time period T2and a time period T2′ obtained by correcting the time period T2should be used. A servo-sector-pulse-generating unit generates a servo sector pulse a time period T1after the detection of each servo mark, and generates a pseudo servo sector pulse when the time period determined by the determination circuit has elapsed after the detection of each servo mark, if the next servo mark is not detected during the determined time period.

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patent: 07-037326 (1995-02-01), None
patent: 8-31102 (1996-02-01), None
patent: 2000-100095 (2000-04-01), None

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