Servo track writing device and method thereof

Details Servo track writing device and method thereof Servo track writing device and method thereof

2007-06-19

2007-06-19

Wellington, Andrea (Department: 2627)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data clocking

C360S075000

Reexamination Certificate

active

10641300

ABSTRACT:
A vibration extraction processing unit extracts a deflection component synchronous with a rotation from a clock signal of a non-contact sensor so as to correct a clock jitter. A clock generating unit generates a clock signal of any format frequency preliminarily set up according to the clock signal from the vibration extraction processing unit. A sector correction processing unit measures an error due to the frequency deflection so as to correct the writing start position for the format pattern signal of each sector containing a servo frame signal stored in a memory according to the measured error. Writing processing units read out the corrected format pattern signal from the memory according to a synchronous signal corresponding to a single turn of a disc and a format frequency clock signal and then writes into a disc medium face.

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Annex to the European Search Report.

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