Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2005-01-25
2005-01-25
Huber, Paul W. (Department: 2653)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S044350, C369S124120
Reexamination Certificate
active
06847597
ABSTRACT:
A device with an optical disk drive with a digital servo system for controlling tracking or focus in an optical disk driver is presented. A servo system according to the present invention includes an optical pick-up with detectors providing optical signals, an analog processor receiving the optical signals and providing a digital signal, and digital processors receiving the digital signal and providing a control signal that controls the position of the optical pick-up unit. The digital processor executes an algorithm that calculates an error signal, provides amplification and biasing to the error signal, provides filtering for the error signal, and computes the control signal. The error signal can be the focus error signal or the tracking error signal. The device can be any device.
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Kadlec Ron J.
Turner Christopher J.
Wach Hans B.
Watt Charles R.
DPHI Acquisitions, Inc.
Huber Paul W.
MacPherson Kwok & Chen & Heid LLP
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