Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1997-04-14
2000-10-24
Edun, Muhammad N.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 4427, 369 43, 360 75, G11B 700
Patent
active
061377538
ABSTRACT:
The invention provides methods and apparatus for compensating for disc runout. In an exemplary embodiment, a data-storage device is provided which includes a rotatable disc and a data head for accessing the disc. The device includes a runout calibration system comprising positioning mechanics coupled to the head for moving the head relative to the disc. A servo loop incorporates the positioning mechanics and generates a drive signal used to control the positioning mechanics. A memory, having an input and an output coupled to the loop, is also provided for recording a plurality of samples of the drive signal. The memory then plays back those samples into the feedback loop at first periodic angular increments forming a calibrating drive signal.
REFERENCES:
patent: 3881184 (1975-04-01), Koepcke et al.
patent: 4135217 (1979-01-01), Jacques et al.
patent: 4136365 (1979-01-01), Chick et al.
patent: 4149199 (1979-04-01), Chick et al.
patent: 4205338 (1980-05-01), Schaefer
patent: 4371960 (1983-02-01), Kroiss
patent: 4536809 (1985-08-01), Sidman
patent: 4594622 (1986-06-01), Wallis
patent: 4616276 (1986-10-01), Workman
patent: 4628379 (1986-12-01), Andrews, Jr. et al.
patent: 4745588 (1988-05-01), Yoshikawa et al.
patent: 4755977 (1988-07-01), Abed
patent: 4764914 (1988-08-01), Estes et al.
patent: 4982297 (1991-01-01), Tsujisawa
patent: 5051851 (1991-09-01), Sakurai
patent: 5072318 (1991-12-01), Yu
patent: 5121374 (1992-06-01), Barton et al.
patent: 5187620 (1993-02-01), Notake et al.
patent: 5241433 (1993-08-01), Anderson et al.
patent: 5402280 (1995-03-01), Supino
patent: 5404253 (1995-04-01), Painter
patent: 5539714 (1996-07-01), Andrews, Jr. et al.
patent: 5550685 (1996-08-01), Drouin
patent: 5559768 (1996-09-01), Ito et al.
Edun Muhammad N.
Oak Technology, Inc.
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