Method for determining read/write head position based on...

Details Method for determining read/write head position based on... Method for determining read/write head position based on...

2008-07-29

2008-07-29

Sniezek, Andrew L. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S077020

Reexamination Certificate

active

11405872

ABSTRACT:
A method determines RW head radial position relative to tracks within a magnetic data disc. This involves sensing both a S-burst signal and a P-burst signal with the RW head. The S-burst signal and P-burst signal are associated with a two-burst servo pattern on the magnetic disc. The S-burst pattern has a phase that remains constant radially across tracks within the magnetic disc. The P-burst has a second phase that rotates radially across tracks within the magnetic disc. By determining a phase difference between a sensed S-burst signal and P-burst signal, it is possible to determine the RW head radial position relative to the tracks on the magnetic disc.

REFERENCES:
patent: 6366423 (2002-04-01), Ahn
patent: 7027257 (2006-04-01), Kupferman
patent: 7342734 (2008-03-01), Patapoutian et al.
patent: 2003/0197969 (2003-10-01), Szita et al.
patent: 2004/0252394 (2004-12-01), Hamaguchi et al.
patent: 2005/0134987 (2005-06-01), Suzuki et al.
patent: 2006/0279873 (2006-12-01), Bandic et al.

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