CE to RRO cancellation for sled control

Details CE to RRO cancellation for sled control CE to RRO cancellation for sled control

2005-10-26

2009-08-25

Feild, Joseph (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044290

Reexamination Certificate

active

07580330

ABSTRACT:
An apparatus comprising a center error creation circuit, a center error controller, and a center error repeatable run out circuit. The center error creation circuit may be configured to generate a center error signal in response to photo-diode signals. The center error controller may be configured to adjust a lens to a center position in a sled housing with a step motor in response to a center error measure signal. The center error repeatable run out circuit may be configured to generate a center error run out signal and the center error measure signal in response to the center error signal. The center error repeatable run out circuit may generate the center error measure signal by measuring the center error signal when the center error run out signal is in a peak phase.

REFERENCES:
patent: 5499105 (1996-03-01), Wakui
patent: 7136329 (2006-11-01), Yoon et al.
patent: 2001/0002893 (2001-06-01), Ohshita et al.
patent: 2003/0151987 (2003-08-01), Watanabe et al.

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