Invention Grant
- Patent Title: Servo signal recording apparatus, information recording apparatus, and tracking servo method
- Patent Title (中): 伺服信号记录装置,信息记录装置和跟踪伺服方法
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Application No.: US12476773Application Date: 2009-06-02
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Publication No.: US08068308B2Publication Date: 2011-11-29
- Inventor: Masao Fujita , Shinji Kawakami , Toshio Kawakita , Sadamu Kuse
- Applicant: Masao Fujita , Shinji Kawakami , Toshio Kawakita , Sadamu Kuse
- Applicant Address: JP Ibaraki-Shi, Osaka
- Assignee: Hitachi Maxell, Ltd.
- Current Assignee: Hitachi Maxell, Ltd.
- Current Assignee Address: JP Ibaraki-Shi, Osaka
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2008-144774 20080602
- Main IPC: G11B5/584
- IPC: G11B5/584 ; G11B21/02

Abstract:
In the apparatus and method of the invention, a servo signal reproduction unit generates a PES from a servo signal reproduced from a magnetic tape, and a frequency conversion unit performs FFT processing of the PES to generate frequency component information. Then, a filter value generation unit generates filter values based on the frequency component information and writes these to a memory. When recording various data signals to the magnetic tape, the filter values are read from the memory and a control filter serving as a notch filter is incorporated into a feedback control for a tracking servo. This enables periodic and narrow-band noise to be removed from a PES, consequently reducing PESs. Accordingly, learning-type optimum notch filter control that allows a magnetic head to follow recording tracks at high speed and with high precision is possible even when the recording track width is reduced and the tape speed is increased.
Public/Granted literature
- US20090296269A1 SERVO SIGNAL RECORDING APPARATUS, INFORMATION RECORDING APPARATUS, AND TRACKING SERVO METHOD Public/Granted day:2009-12-03
Information query
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