Invention Application
- Patent Title: PHASE ERROR RECOVERY CIRCUITRY AND METHOD FOR A MAGNETIC RECORDING DEVICE
- Patent Title (中): 相位误差恢复电路和磁记录装置的方法
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Application No.: US14808721Application Date: 2015-07-24
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Publication No.: US20170025147A1Publication Date: 2017-01-26
- Inventor: Michael J. Link , Bruce Douglas Buch , Belkacem Derras
- Applicant: Seagate Technology LLC
- Main IPC: G11B20/10
- IPC: G11B20/10 ; G11B20/18 ; G11B5/09

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.
Public/Granted literature
- US09613652B2 Phase error recovery circuitry and method for a magnetic recording device Public/Granted day:2017-04-04
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