Invention Application
US20170025147A1 PHASE ERROR RECOVERY CIRCUITRY AND METHOD FOR A MAGNETIC RECORDING DEVICE 有权
相位误差恢复电路和磁记录装置的方法

PHASE ERROR RECOVERY CIRCUITRY AND METHOD FOR A MAGNETIC RECORDING DEVICE
Abstract:
A recording head is configured to write and read data sectors to and from a recording medium, such as a heat-assisted recording medium. A read channel is coupled to the recording head. Phase-locked loop (PLL) circuitry of the read channel is configured to detect a change in a phase error at a location of the data sector. The phase error change may be indicative of a mode-hop that occurred while writing the data sector to the medium. The PLL circuitry is configured to determine a phase offset using the phase error. A controller is configured to effect re-reading of the data sector location using the phase offset to recover the data sector location.
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