公开(公告)号：US5798885A

公开(公告)日：1998-08-25

申请号：US435132

申请日：1995-05-05

申请人： Masaru Saiki ,  Tsutomu Sasaki ,  Hirokazu Ishizaki ,  Eiji Okamura ,  Tatsuya Gofuku ,  Norihiko Suzuki ,  Koichi Tohkairin ,  Hirofumi Suzuki ,  Kenji Endo ,  Chihiro Ono ,  Kazuhide Ohba ,  Atsushi Satoh ,  Eisaku Takahashi ,  Takashi Tokairin ,  Isao Suda ,  Takahiro Ono

发明人： Masaru Saiki ,  Tsutomu Sasaki ,  Hirokazu Ishizaki ,  Eiji Okamura ,  Tatsuya Gofuku ,  Norihiko Suzuki ,  Koichi Tohkairin ,  Hirofumi Suzuki ,  Kenji Endo ,  Chihiro Ono ,  Kazuhide Ohba ,  Atsushi Satoh ,  Eisaku Takahashi ,  Takashi Tokairin ,  Isao Suda ,  Takahiro Ono

IPC分类号： G11B5/00 ,  G11B5/012 ,  G11B5/40 ,  G11B5/48 ,  G11B5/55 ,  G11B5/596 ,  G11B21/08 ,  G11B25/04 ,  G11B33/00

CPC分类号： G11B25/043 ,  G11B21/083 ,  G11B33/00 ,  G11B5/5521 ,  G11B5/5534 ,  G11B5/596 ,  G11B2005/0018 ,  G11B5/012 ,  G11B5/40 ,  G11B5/486 ,  G11B5/59655

摘要： For a balance adjustment due to a reduction in size and weight of an actuator, an arm portion, an axis attaching portion, and a coil supporting portion are arranged so that the centers of gravity on the coil side are located on a straight line connecting a rotational center and the center of gravity on the head side. Further, the improvement of an assembling efficiency of a VCM, an increase in torque, a one-touch fixing of an FPC connecting band, a noise prevention of a read pattern, and an insulation between the base and cover due to a bias of an MR read head are accomplished. A sector mark is detected by comparing a peak detection pulse and its reference polarity signal. A redundancy is provided to a reference detection polarity signal so that a read signal can be detected even if any one of the read signals of the sector marks is dropped out. A gray code detecting section for recognizing a cylinder address also detects on the basis of a peak detection pulse and a polarity signal due to the reading of a gray code. A memory space to store a program is divided into an ROM space of a small electric power consumption and an RAM space of a large electric power consumption and stores each peculiar program.

摘要翻译： 为了由于致动器的尺寸和重量的减小而进行的平衡调整，布置臂部，轴安装部和线圈支撑部，使得线圈侧的重心位于连接 旋转中心和头部重心。 此外，由于VC的偏置，VCM的组装效率的提高，转矩的增加，FPC连接带的一触式固定，读取图案的噪声防止以及基座和盖之间的绝缘 MR读头完成。 通过比较峰值检测脉冲和其参考极性信号来检测扇区标记。 向参考检测极性信号提供冗余，使得即使扇区标记的读取信号中的任何一个被丢弃也可以检测读取信号。 用于识别气缸地址的灰度代码检测部分还根据读取灰度代码的峰值检测脉冲和极性信号进行检测。 用于存储程序的存储器空间被划分为具有小功耗的ROM空间和大功率消耗的RAM空间，并且存储每个特殊程序。

公开(公告)号：US6137646A

公开(公告)日：2000-10-24

申请号：US872771

申请日：1997-06-10

申请人： Eiji Okamura ,  Tatsuya Gofuku ,  Chihiro Ono ,  Kazuhide Ohba ,  Atsushi Satoh ,  Eisaku Takahashi ,  Takashi Tokairin ,  Isao Suda

发明人： Eiji Okamura ,  Tatsuya Gofuku ,  Chihiro Ono ,  Kazuhide Ohba ,  Atsushi Satoh ,  Eisaku Takahashi ,  Takashi Tokairin ,  Isao Suda

IPC分类号： G11B5/00 ,  G11B5/012 ,  G11B5/40 ,  G11B5/48 ,  G11B5/55 ,  G11B5/596 ,  G11B21/08 ,  G11B25/04 ,  G11B33/00 ,  G11B5/09

CPC分类号： G11B25/043 ,  G11B21/083 ,  G11B33/00 ,  G11B5/5521 ,  G11B5/5534 ,  G11B5/596 ,  G11B2005/0018 ,  G11B5/012 ,  G11B5/40 ,  G11B5/486 ,  G11B5/59655

摘要： A disk apparatus has a disk medium with sector areas that have a servo area and a data area along the same cylinder. The servo areas also have a sector mark indicative of the servo area, a code indicative of a cylinder address, and a predetermined servo pattern to detect a head position, all magnetically recorded in the servo area. A disk control section uses a head portion to detect the head position on the basis of a read signal of the servo pattern and positions the head portion at an arbitrary cylinder to perform reading and writing operations. The disk apparatus also has a time measuring counter for starting to measure an elapsed time each time a predetermined position in the servo area is detected, and a time setting register for storing a time from a detection time point of the predetermined position in the servo area to the generation of the sector pulse. A coincidence detecting section is provided to detect that the elapsed time measured by the time measuring counter coincides with the set time of the register, while a pulse generating section is provided for generating the sector pulse when the coincidence is detected by the coincidence detecting section.

摘要翻译： 磁盘装置具有具有扇区区域的磁盘介质，其具有伺服区域和沿着同一气缸的数据区域。 伺服区域还具有指示伺服区域的扇区标记，指示气缸地址的代码以及检测头部位置的预定伺服模式，磁头记录在伺服区域中。 磁盘控制部分使用磁头部分来根据伺服模式的读取信号来检测磁头位置，并将磁头部分定位在任意磁盘上，以进行读写操作。 磁盘装置还具有时间测量计数器，用于每当检测到伺服区域中的预定位置时开始测量经过时间;以及时间设置寄存器，用于从伺服区域中的预定位置的检测时间点存储时间 到扇区脉冲的产生。 提供符合检测部分，用于检测由时间测量计数器测量的经过时间与寄存器的设定时间一致，同时提供脉冲发生部分，用于当由重合检测部分检测到重合时产生扇区脉冲。

公开(公告)号：US07706091B2

公开(公告)日：2010-04-27

申请号：US11709539

申请日：2007-02-22

申请人： Takao Furuhashi ,  Kazuhide Ohba ,  Yoshimichi Sakai

发明人： Takao Furuhashi ,  Kazuhide Ohba ,  Yoshimichi Sakai

IPC分类号： G11B5/09 ,  G11B21/02

CPC分类号： G11B5/09 ,  G11B5/012 ,  G11B5/5526 ,  G11B5/5534 ,  G11B21/083

摘要： The present invention relates to a magnetic disk device and provides a magnetic disk device in which data recording areas are separately set based on the inner recording boundary or outer recording boundary of the head measured for each magnetic disk device. When the recording linear (angular) density that has to be attained to ensure a prescribed capacity cannot be attained by the head, the recording linear (angular) density that has to be attained by the head is reduced and the prescribed capacity is realized by expanding the data recording area. A method using a counter-electromotive force generated when the head is moved toward a stopper or ramp load or a method by which the measurements are conducted based on the head position information from the servo signal can be used for measuring the positions of the inner recording boundary and outer recording boundary of the head.

摘要翻译： 磁盘装置技术领域本发明涉及一种磁盘装置，其特征在于，提供一种磁盘装置，其中，基于针对每个磁盘装置测量的磁头的内部记录边界或外部记录边界，分别设置数据记录区域。 当通过磁头无法获得确保规定容量的记录线性（角度）密度时，头部必须达到的记录线性（角度）密度降低，通过扩展实现规定的容量 数据记录区。 可以使用使用当头部朝向止动器或斜坡负载移动时产生的反电动势的方法或者基于来自伺服信号的头部位置信息进行测量的方法来测量内部记录的位置 边界和外部记录边界的头部。

公开(公告)号：US20050134994A1

公开(公告)日：2005-06-23

申请号：US11054589

申请日：2005-02-09

申请人： Takao Furuhashi ,  Kazuhide Ohba ,  Yoshimichi Sakai

发明人： Takao Furuhashi ,  Kazuhide Ohba ,  Yoshimichi Sakai

IPC分类号： G11B5/012 ,  G11B5/09 ,  G11B5/55 ,  G11B19/02 ,  G11B21/02

CPC分类号： G11B5/09 ,  G11B5/012 ,  G11B5/5526 ,  G11B5/5534 ,  G11B21/083

摘要： The present invention relates to a magnetic disk device and provides a magnetic disk device in which data recording areas are separately set based on the inner recording boundary or outer recording boundary of the head measured for each magnetic disk device. When the recording linear (angular) density that has to be attained to ensure a prescribed capacity cannot be attained by the head, the recording linear (angular) density that has to be attained by the head is reduced and the prescribed capacity is realized by expanding the data recording area. A method using a counter-electromotive force generated when the head is moved toward a stopper or ramp load or a method by which the measurements are conducted based on the head position information from the servo signal can be used for measuring the positions of the inner recording boundary and outer recording boundary of the head.

摘要翻译： 磁盘装置技术领域本发明涉及一种磁盘装置，其特征在于，提供一种磁盘装置，其中，基于针对每个磁盘装置测量的磁头的内部记录边界或外部记录边界，分别设置数据记录区域。 当通过磁头无法获得确保规定容量的记录线性（角度）密度时，头部必须达到的记录线性（角度）密度降低，通过扩展实现规定的容量 数据记录区。 可以使用使用当头朝向止动器或斜坡负载移动时产生的反电动势的方法或基于来自伺服信号的头部位置信息进行测量的方法来测量内部记录的位置 边界和外部记录边界的头部。

公开(公告)号：US06172838B2

公开(公告)日：2001-01-09

申请号：US09318110

申请日：1999-05-24

申请人： Kazuhide Ohba

发明人： Kazuhide Ohba

IPC分类号： G11B5596

CPC分类号： G11B21/106 ,  G11B5/4846 ,  G11B5/59611 ,  G11B5/59688

摘要： An actuator is provided with a step so as to allow FPC mounting surfaces of a read/write FPC band and of a relay FPC to be level with each other. Pointer information P4 in a ROM table is used to refer to a RAM table to acquire offset correction data. On-track control is effected at a cross point of two-phase servo signals N and Q. A value of this cross point is measured to find a position sensitivity correction value. A gap corresponding to encode loss is provided at the trailing position of each of sectors. In read operation, a sector pulse is generated with a delay corresponding to decode loss.

摘要翻译： 致动器设置有使得读/写FPC带和继电器FPC的FPC安装表面彼此平齐的台阶。 ROM表中的指针信息P4用于指代RAM表以获取偏移校正数据。在两相伺服信号N和Q的交叉点进行轨道控制。该交叉点的值被测量为 找到位置敏感度校正值。 在每个扇区的尾部位置处提供对应于编码丢失的间隙。 在读取操作中，产生具有对应于解码丢失的延迟的扇区脉冲。

公开(公告)号：US07317587B2

公开(公告)日：2008-01-08

申请号：US11054589

申请日：2005-02-09

申请人： Takao Furuhashi ,  Kazuhide Ohba ,  Yoshimichi Sakai

发明人： Takao Furuhashi ,  Kazuhide Ohba ,  Yoshimichi Sakai

IPC分类号： G11B5/09 ,  G11B21/02

CPC分类号： G11B5/09 ,  G11B5/012 ,  G11B5/5526 ,  G11B5/5534 ,  G11B21/083

摘要： The present invention relates to a magnetic disk device and provides a magnetic disk device in which data recording areas are separately set based on the inner recording boundary or outer recording boundary of the head measured for each magnetic disk device. When the recording linear (angular) density that has to be attained to ensure a prescribed capacity cannot be attained by the head, the recording linear (angular) density that has to be attained by the head is reduced and the prescribed capacity is realized by expanding the data recording area. A method using a counter-electromotive force generated when the head is moved toward a stopper or ramp load or a method by which the measurements are conducted based on the head position information from the servo signal can be used for measuring the positions of the inner recording boundary and outer recording boundary of the head.

摘要翻译： 磁盘装置技术领域本发明涉及一种磁盘装置，其特征在于，提供一种磁盘装置，其中，基于针对每个磁盘装置测量的磁头的内部记录边界或外部记录边界，分别设置数据记录区域。 当通过磁头无法获得确保规定容量的记录线性（角度）密度时，头部必须达到的记录线性（角度）密度降低，通过扩展实现规定的容量 数据记录区。 可以使用使用当头朝向止动器或斜坡负载移动时产生的反电动势的方法或基于来自伺服信号的头部位置信息进行测量的方法来测量内部记录的位置 边界和外部记录边界的头部。

公开(公告)号：US20070171560A1

公开(公告)日：2007-07-26

申请号：US11709539

申请日：2007-02-22

申请人： Takao Furuhashi ,  Kazuhide Ohba ,  Yoshimichi Sakai

发明人： Takao Furuhashi ,  Kazuhide Ohba ,  Yoshimichi Sakai

IPC分类号： G11B5/09 ,  G11B21/02

CPC分类号： G11B5/09 ,  G11B5/012 ,  G11B5/5526 ,  G11B5/5534 ,  G11B21/083

摘要： The present invention relates to a magnetic disk device and provides a magnetic disk device in which data recording areas are separately set based on the inner recording boundary or outer recording boundary of the head measured for each magnetic disk device. When the recording linear (angular) density that has to be attained to ensure a prescribed capacity cannot be attained by the head, the recording linear (angular) density that has to be attained by the head is reduced and the prescribed capacity is realized by expanding the data recording area. A method using a counter-electromotive force generated when the head is moved toward a stopper or ramp load or a method by which the measurements are conducted based on the head position information from the servo signal can be used for measuring the positions of the inner recording boundary and outer recording boundary of the head.

摘要翻译： 磁盘装置技术领域本发明涉及一种磁盘装置，其特征在于，提供一种磁盘装置，其中，基于针对每个磁盘装置测量的磁头的内部记录边界或外部记录边界，分别设置数据记录区域。 当通过磁头无法获得确保规定容量的记录线性（角度）密度时，头部必须达到的记录线性（角度）密度降低，通过扩展实现规定的容量 数据记录区。 可以使用使用当头朝向止动器或斜坡负载移动时产生的反电动势的方法或基于来自伺服信号的头部位置信息进行测量的方法来测量内部记录的位置 边界和外部记录边界的头部。

公开(公告)号：US6067200A

公开(公告)日：2000-05-23

申请号：US893313

申请日：1997-07-16

申请人： Kazuhide Ohba ,  Kensuke Miyagawa ,  Hajime Miura ,  Hideki Ohmori

发明人： Kazuhide Ohba ,  Kensuke Miyagawa ,  Hajime Miura ,  Hideki Ohmori

IPC分类号： G11B5/39 ,  G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/035 ,  G11B5/455 ,  G11B5/03

CPC分类号： G11B5/455 ,  G11B5/012 ,  G11B5/02 ,  G11B5/035 ,  G11B2005/0018

摘要： A method is provided to adjust a bias current flowing through a magneto-resistive effect type magnetic head. An examining current is supplied to the magneto-resistive effect type magnetic head, and a voltage applied to a pair of terminals of the magneto-resistive effect type magnetic head is measured. In addition, a resistance of the magneto-resistive effect type magnetic head is calculated according to the examining current and the voltage, and an allowable range of the bias current flowing through the magneto-resistive effect type magnetic head is determined according to a relationship between a life time of the magneto-resistive effect type magnetic head examined in advance and the resistance of the magneto-resistive effect type magnetic head. An optimum bias current is determined within the allowable range in condition that a slice level margin is maximized.

摘要翻译： 提供了一种调节流过磁阻效应型磁头的偏置电流的方法。 检查电流被提供给磁阻效应型磁头，并且测量施加到磁阻效应型磁头的一对端子的电压。 此外，根据检查电流和电压计算磁阻效应型磁头的电阻，并且流过磁阻效应型磁头的偏流的容许范围根据 提前检查磁阻效应型磁头的寿命和磁阻效应型磁头的电阻。 在限幅电平裕度最大化的条件下，在容许范围内确定最佳偏置电流。