Method for determining sub-beam add signal (SBAD) value

Details Method for determining sub-beam add signal (SBAD) value Method for determining sub-beam add signal (SBAD) value

2005-07-07

2008-08-19

Hindi, Nabil Z (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S047250, C369S124100

Reexamination Certificate

active

07414928

ABSTRACT:
A method for determining a sub-beam add signal (SBAD) value is provided. At first, a jthread SBAD value is obtained at the jthread status. Next, the jthwrite SBAD value is determined according to the (j−1)thwrite SBAD gain at the jthwrite status. Then, the jthSBAD multiple is obtained according to the jthwrite SBAD value and the jthread SBAD value. Next, the (j−1)thwrite SBAD gain is changed into the jthwrite SBAD gain according to the jthSBAD multiple. At last, the level of the (j+1)thwrite SBAD value is adjusted according to the jthwrite SBAD gain at the (j+1)thwrite status.

REFERENCES:
patent: 5247509 (1993-09-01), Nakane et al.
patent: 5473550 (1995-12-01), Cameron et al.

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