Invention Grant
- Patent Title: Quadrature track error signal for optical recording media and devices
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Application No.: US15600624Application Date: 2017-05-19
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Publication No.: US10079037B2Publication Date: 2018-09-18
- Inventor: Faramarz Mahnad
- Applicant: Oracle International Corporation
- Applicant Address: US CA Redwood Shores
- Assignee: Oracle International Corporation
- Current Assignee: Oracle International Corporation
- Current Assignee Address: US CA Redwood Shores
- Agency: Invoke
- Main IPC: G11B7/085
- IPC: G11B7/085 ; G11B7/095 ; G11B7/005

Abstract:
A method for providing tracking error signals in an optical data storage system includes a step of receiving a wobble signal having a first frequency from the wobble detection system. The wobble detection system includes an optical pick up unit that detects positions of the head relative to lands and grooves. Characteristically, the wobble signal is amplitude modulated for positions intermediate between the land and the groove. The method further includes a step of receiving a primary tracking error signal from the wobble detection system. The wobble signal is multiplied with a synchronous signal to about a product signal. The product signal is positive for a first direction of motion and negative for a second direction of motion that is opposite that of the first direction. The product signal is integrated to obtain a quadrature track error signal.
Public/Granted literature
- US20170256279A1 QUADRATURE TRACK ERROR SIGNAL FOR OPTICAL RECORDING MEDIA AND DEVICES Public/Granted day:2017-09-07
Information query
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