Apparatus for controling servo signal gains of an optical...

Details Apparatus for controling servo signal gains of an optical... Apparatus for controling servo signal gains of an optical...

2011-03-22

2011-03-22

Young, Wayne R (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044260

Reexamination Certificate

active

07911891

ABSTRACT:
The invention provides an apparatus for controlling servo signal gains of an optical disc drive. The apparatus adjusts the gains of a plurality of servo signals controlling a servo system of the optical disc drive according to a closed-loop mode or a state-reloading mode whenever the optical disk drive encounters an operating state transition. In closed-loop mode, at least one AGC loop of the apparatus compensates the gains of the servo signals with a selectable bandwidth during a specific period after the operating state transition to accelerate the convergence of the servo signals. In state-reloading mode, at least one AGC loop of the apparatus reloads the previously saved convergence values or pre-determined values as the initial values according to the current operating state immediately after the operating state transition to accelerate the convergence of the servo signals.

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English language translation of abstract of CN 1573973 (published Feb. 2, 2005).
English language translation of abstract of CN 1604208 (published Apr. 6, 2005).

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