Invention Grant
US08477444B1 Clock frequency synchronization for magnetic recording device 有权
磁记录装置的时钟频率同步

Clock frequency synchronization for magnetic recording device
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.
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