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1. 发明授权

US07489467B2 Method for measuring track width of hard disk drive 失效
标题翻译：测量硬盘驱动器磁道宽度的方法
公开(公告)号：US07489467B2
公开(公告)日：2009-02-10
申请号：US11699991
申请日：2007-01-31
申请人： Jae-Hyeong Kim , Yong-Gwon Lee , Sang-Hoon Chu , Cheol-Hoon Park
发明人： Jae-Hyeong Kim , Yong-Gwon Lee , Sang-Hoon Chu , Cheol-Hoon Park
IPC分类号： G11B21/02 , G11B5/596
CPC分类号： G11B27/36 , G11B2220/2516
摘要： In a method of measuring track widths in a hard disk drive a plurality of estimation values are calculated based on differences in intensity between a plurality first measurement signals produced in relation to a head of the hard disk drive based on a plurality of burst signals stored in servo sectors of a track when the head moves along the track on a first side of a center of the track, and a plurality of second measurement signals produced in relation to the head of the hard disk drive based on the plurality of burst signals when the head moves along the track on a second side of the center of the track opposite the first side. The estimation values are then normalized, and excessive variation in the track widths is detected based on the normalized estimation values.
摘要翻译：在测量硬盘驱动器中的磁道宽度的方法中，基于存储在硬盘驱动器中的多个突发信号，基于与硬盘驱动器的磁头相关的多个第一测量信号之间的强度差来计算多个估计值当磁头沿轨道的中心的第一侧上的轨道移动时轨道的伺服扇区，以及当基于多个突发信号时相对于硬盘驱动器的磁头产生的多个第二测量信号头部沿轨道的中心的第二侧沿第一侧移动。然后将估计值归一化，并且基于归一化的估计值来检测轨道宽度的过度变化。

2. 发明申请

US20070188903A1 Method for measuring track width of hard disk drive 失效
标题翻译：测量硬盘驱动器的磁道宽度的方法
公开(公告)号：US20070188903A1
公开(公告)日：2007-08-16
申请号：US11699991
申请日：2007-01-31
申请人： Jae-Hyeong Kim , Yong-Gwon Lee , Sang-Hoon Chu , Cheol-Hoon Park
发明人： Jae-Hyeong Kim , Yong-Gwon Lee , Sang-Hoon Chu , Cheol-Hoon Park
IPC分类号： G11B27/36
CPC分类号： G11B27/36 , G11B2220/2516
摘要： In a method of measuring track widths in a hard disk drive a plurality of estimation values are calculated based on differences in intensity between a plurality first measurement signals produced in relation to a head of the hard disk drive based on a plurality of burst signals stored in servo sectors of a track when the head moves along the track on a first side of a center of the track, and a plurality of second measurement signals produced in relation to the head of the hard disk drive based on the plurality of burst signals when the head moves along the track on a second side of the center of the track opposite the first side. The estimation values are then normalized, and excessive variation in the track widths is detected based on the normalized estimation values.
摘要翻译：在测量硬盘驱动器中的磁道宽度的方法中，基于存储在硬盘驱动器中的多个突发信号，基于与硬盘驱动器的磁头相关的多个第一测量信号之间的强度差来计算多个估计值当磁头沿轨道的中心的第一侧上的轨道移动时轨道的伺服扇区，以及当基于多个突发信号时相对于硬盘驱动器的磁头产生的多个第二测量信号头部沿轨道的中心的第二侧沿第一侧移动。然后将估计值归一化，并且基于归一化的估计值来检测轨道宽度的过度变化。

3. 发明申请

US20050117245A1 Apparatus and method for unlatching a head within a data storage device 失效
标题翻译：用于在数据存储设备内解锁头的装置和方法
公开(公告)号：US20050117245A1
公开(公告)日：2005-06-02
申请号：US10986581
申请日：2004-11-12
申请人： Cheol-Hoon Park , Kwang-Jo Jung , Sang-Hoon Chu , Yong-Gwon Lee , Chul Park
发明人： Cheol-Hoon Park , Kwang-Jo Jung , Sang-Hoon Chu , Yong-Gwon Lee , Chul Park
IPC分类号： G11B21/12 , G11B5/54 , G11B21/02 , G11B5/596
CPC分类号： G11B5/54 , G11B21/12
摘要： For unlatching a head within a data storage device, such as a HDD (hard disc drive), a VCM (voice coil motor) amplifier with a switch is used for applying at least one cycle of an acceleration current pulse to a voice coil motor (VCM) for unlatching the head during an acceleration time zone. An analog to digital converter samples a characteristic of the VCM for indicating a speed of the head during the acceleration time zone. An unlatch controller terminates the acceleration time zone when the speed of the head is higher than a threshold speed, for more stable operation of the head but with guarantee of unlatching, regardless of the latch force within the HDD.
摘要翻译：为了解锁诸如HDD（硬盘驱动器）的数据存储设备内的磁头，具有开关的VCM（音圈电机）放大器用于将至少一个加速电流脉冲的周期施加到音圈电机（ VCM），用于在加速时区内解锁头。模数转换器对VCM的特性进行采样，以在加速时间段期间指示磁头的速度。当头部的速度高于阈值速度时，解锁控制器终止加速时间段，以便头部的更稳定的操作，但是保证不解锁，而与HDD内的锁定力无关。

4. 发明授权

US07145743B2 Apparatus and method for unlatching a head within a data storage device 失效
标题翻译：用于在数据存储设备内解锁头的装置和方法
公开(公告)号：US07145743B2
公开(公告)日：2006-12-05
申请号：US10986581
申请日：2004-11-12
申请人： Cheol-Hoon Park , Kwang-Jo Jung , Sang-Hoon Chu , Yong-Gwon Lee , Chul Park
发明人： Cheol-Hoon Park , Kwang-Jo Jung , Sang-Hoon Chu , Yong-Gwon Lee , Chul Park
IPC分类号： G11B21/02
CPC分类号： G11B5/54 , G11B21/12
摘要： For unlatching a head within a data storage device, such as a HDD (hard disc drive), a VCM (voice coil motor) amplifier with a switch is used for applying at least one cycle of an acceleration current pulse to a voice coil motor (VCM) for unlatching the head during an acceleration time zone. An analog to digital converter samples a characteristic of the VCM for indicating a speed of the head during the acceleration time zone. An unlatch controller terminates the acceleration time zone when the speed of the head is higher than a threshold speed, for more stable operation of the head but with guarantee of unlatching, regardless of the latch force within the HDD.
摘要翻译：为了解锁诸如HDD（硬盘驱动器）的数据存储设备内的磁头，具有开关的VCM（音圈电机）放大器用于将至少一个加速电流脉冲的周期施加到音圈电机（ VCM），用于在加速时区内解锁头。模数转换器对VCM的特性进行采样，以在加速时间段期间指示磁头的速度。当头部的速度高于阈值速度时，解锁控制器终止加速时间段，以便头部的更稳定的操作，但是保证不解锁，而与HDD内的锁定力无关。

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