Invention Grant
US08422347B2 Method for determining phase difference of tracking error signal in optical disc drive
失效
确定光盘驱动器中跟踪误差信号的相位差的方法
- Patent Title: Method for determining phase difference of tracking error signal in optical disc drive
- Patent Title (中): 确定光盘驱动器中跟踪误差信号的相位差的方法
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Application No.: US13412657Application Date: 2012-03-06
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Publication No.: US08422347B2Publication Date: 2013-04-16
- Inventor: Ming-Hua Hsueh , Yi-Long Hsiao
- Applicant: Ming-Hua Hsueh , Yi-Long Hsiao
- Applicant Address: TW Taoyuan County
- Assignee: Quanta Storage Inc.
- Current Assignee: Quanta Storage Inc.
- Current Assignee Address: TW Taoyuan County
- Agency: Rabin & Berdo, P.C.
- Priority: TW100112741A 20110412
- Main IPC: G11B7/00
- IPC: G11B7/00
Abstract:
A method for determining a phase difference of a tracking error signal is provided. The method includes: predetermining a plurality of phase differences, measuring MPP and SPP signals, establishing a phase difference curve by use of an amplitude ratio between (MPP+SPP) and (MPP−SPP), measuring MPP and SPP signals for a tracking error signal under test, calculating the amplitude ratio (MPP+SPP)/(MPP−SPP), and comparing with the phase difference curve to promptly determine the phase difference.
Public/Granted literature
- US20120263027A1 METHOD FOR DETERMINING PHASE DIFFERENCE OF TRACKING ERROR SIGNAL Public/Granted day:2012-10-18
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