Invention Grant
US07889447B2 Readback signal-based head-disc contact detection using AM/FM demodulation
有权
采用AM / FM解调技术回读基于信号的头盘接触检测
- Patent Title: Readback signal-based head-disc contact detection using AM/FM demodulation
- Patent Title (中): 采用AM / FM解调技术回读基于信号的头盘接触检测
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Application No.: US12353564Application Date: 2009-01-14
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Publication No.: US07889447B2Publication Date: 2011-02-15
- Inventor: Juil Lee , Michael Ting , Mark David Bedillion
- Applicant: Juil Lee , Michael Ting , Mark David Bedillion
- Applicant Address: US CA Scotts Valley
- Assignee: Seagate Technology LLC
- Current Assignee: Seagate Technology LLC
- Current Assignee Address: US CA Scotts Valley
- Agency: Pietragallo Gordon Alfano Bosick & Raspanti, LLP
- Agent Robert P. Lenart, Esq.
- Main IPC: G11B20/06
- IPC: G11B20/06
Abstract:
A method includes: producing a readback signal using a recording head positioned adjacent to a recording medium, amplitude demodulating the readback signal to produce an amplitude demodulated signal, frequency demodulating the readback signal to produce a frequency demodulated signal, and using the amplitude demodulated signal and the frequency demodulated signal to determine contact of the recording head with the recording medium. An apparatus that can be used to implement the method is also provided.
Public/Granted literature
- US20100177429A1 Readback Signal-Based Head-Disc Contact Detection Using AM/FM Demodulation Public/Granted day:2010-07-15
Information query
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