Invention Grant
- Patent Title: Clock frequency synchronization for magnetic recording device
- Patent Title (中): 磁记录装置的时钟频率同步
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Application No.: US12786242Application Date: 2010-05-24
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Publication No.: US08477444B1Publication Date: 2013-07-02
- Inventor: Qiyue Zou , Xueshi Yang , Gregory Burd
- Applicant: Qiyue Zou , Xueshi Yang , Gregory Burd
- Applicant Address: BM Hamilton
- Assignee: Marvell International Ltd.
- Current Assignee: Marvell International Ltd.
- Current Assignee Address: BM Hamilton
- Main IPC: G11B5/09
- IPC: G11B5/09 ; G11B5/596

Abstract:
The present disclosure includes systems and techniques relating to control of magnetic recording devices, such as disk drives. Systems and techniques include generating timing data based on a clock signal and a waveform produced by a head operated with respect to a rotating recording medium and the clock signal, determining model parameters based on the timing data to model deterministic disturbances associated with the rotating recording medium, predicting a frequency offset by a model-based technique for the compensation of the deterministic disturbances between two servo wedges, predicting a frequency offset associated with one or more nondeterministic disturbances by a loop filter, determining a clock adjustment based on the predicted deterministic and nondeterministic frequency offsets, and adjusting a clock frequency to read or write data within the area.
Information query
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