Method to reduce the offset component of tracking error in...

Details Method to reduce the offset component of tracking error in... Method to reduce the offset component of tracking error in...

2006-12-05

2006-12-05

Edun, Muhammad (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044320, C369S044280

Reexamination Certificate

active

07145849

ABSTRACT:
A method of tracking error correction, primarily for utilization in optical disc drives using single beam optical pick-up heads. Delinearization in the tracking servo of a single beam optical pick-up head, contributed to by inherent design properties, is minimized by extracting a value proportional to a tracking error signal offset component from a tracking servo demand signal, applying a scaling factor to match the scaling applied to the tracking servo demand signal with scaling applied to the amplified tracking error signal, and subtracting the product of this function from the source signal i.e. the tracking error signal. The modified source signal, following this operation, has a reduced order of tracking error offset.

REFERENCES:
patent: 5914922 (1999-06-01), Supino et al.
patent: 2003/0133374 (2003-07-01), Murata et al.

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