Invention Grant
US07639442B2 Methods and apparatus to perform hard-disk drive head proximity detection in a preamplifier
有权
在前置放大器中执行硬盘驱动器头部接近检测的方法和装置
- Patent Title: Methods and apparatus to perform hard-disk drive head proximity detection in a preamplifier
- Patent Title (中): 在前置放大器中执行硬盘驱动器头部接近检测的方法和装置
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Application No.: US11848849Application Date: 2007-08-31
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Publication No.: US07639442B2Publication Date: 2009-12-29
- Inventor: Motomu Hashizume , Hiroyuki Mukai , Naoko Jinguji , Toru Takeuchi
- Applicant: Motomu Hashizume , Hiroyuki Mukai , Naoko Jinguji , Toru Takeuchi
- Applicant Address: US TX Dallas
- Assignee: Texas Instruments Incorporated
- Current Assignee: Texas Instruments Incorporated
- Current Assignee Address: US TX Dallas
- Agent Dawn V. Stephens; Wade James Brady, III; Fredrick J. Telecky, Jr.
- Main IPC: G11B27/36
- IPC: G11B27/36
Abstract:
Methods and apparatus to perform hard-disk drive head proximity detection in a preamplifier are described. One example method of detecting head position in a hard-disk drive includes obtaining a read signal from a head reading information from a disk; determining a signal envelope of the read signal; comparing the signal envelope to a first threshold to produce a first comparison; filtering the signal envelope; comparing the filtered signal envelope to a second threshold to produce a second comparison; combining the first comparison and the second comparison; and determining if the combination of the first comparison and the second comparison indicates head position oscillation.
Public/Granted literature
- US20080285168A1 METHODS AND APPARATUS TO PERFORM HARD-DISK DRIVE HEAD PROXIMITY DETECTION IN A PREAMPLIFIER Public/Granted day:2008-11-20
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