公开(公告)号：EP0691649B1

公开(公告)日：2001-11-28

申请号：EP95108523.2

申请日：1995-06-02

Applicant: FUJITSU LIMITED

Inventor： Saiki, Masaru, c/o Fujitsu Limited ,  Sasaki, Tsutomu, c/o Fujitsu Limited ,  Ishizaki, Hirokazu, c/o Fujitsu Limited ,  Okamura, Eiji, c/o Fujitsu Limited ,  Gofuku, Tatsuya, c/o Fujitsu Limited ,  Suzuki, Norihiko, c/o Yamagata Fujitsu Limited ,  Tohkairin, Koichi, c/o Yamagata Fujitsu Limited ,  Suzuki, Hirofumi, c/o Yamagata Fujitsu Limited ,  Endo, Kenji, c/o Yamagata Fujitsu Limited ,  Ono, Chihiro, c/o Yamagata Fujitsu Limited ,  Ohba, Kazuhide, c/o Yamagata Fujitsu Limited ,  Satoh, Atsushi, c/o Yamagata Fujitsu Limited ,  Takahashi, Eisaku, c/o Yamagata Fujitsu Limited ,  Tokairin, Takashi, c/o Yamagata Fujitsu Limited ,  Suda, Isao, c/o Yamagata Fujitsu Limited ,  Ono, Takahiro, c/o Yamagata Fujitsu Limited

IPC: G11B21/08 ,  G11B5/55 ,  G11B21/10

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

公开(公告)号：EP0691649A3

公开(公告)日：1996-03-06

申请号：EP95108523.2

申请日：1995-06-02

Applicant: FUJITSU LIMITED

Inventor： Saiki, Masaru, c/o Fujitsu Limited ,  Sasaki, Tsutomu, c/o Fujitsu Limited ,  Ishizaki, Hirokazu, c/o Fujitsu Limited ,  Okamura, Eiji, c/o Fujitsu Limited ,  Gofuku, Tatsuya, c/o Fujitsu Limited ,  Suzuki, Norihiko, c/o Yamagata Fujitsu Limited ,  Tohkairin, Koichi, c/o Yamagata Fujitsu Limited ,  Suzuki, Hirofumi, c/o Yamagata Fujitsu Limited ,  Endo, Kenji, c/o Yamagata Fujitsu Limited ,  Ono, Chihiro, c/o Yamagata Fujitsu Limited ,  Ohba, Kazuhide, c/o Yamagata Fujitsu Limited ,  Satoh, Atsushi, c/o Yamagata Fujitsu Limited ,  Takahashi, Eisaku, c/o Yamagata Fujitsu Limited ,  Tokairin, Takashi, c/o Yamagata Fujitsu Limited ,  Suda, Isao, c/o Yamagata Fujitsu Limited ,  Ono, Takahiro, c/o Yamagata Fujitsu Limited

IPC: G11B21/08

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

Abstract: 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. When the CPU doesn't execute a program in the RAM space, the execution of an idle program in the ROM space is allocated, thereby reducing an electric power consumption in an idle state by using an ROM.

公开(公告)号：EP0691649A2

公开(公告)日：1996-01-10

申请号：EP95108523.2

申请日：1995-06-02

Applicant: FUJITSU LIMITED

Inventor： Saiki, Masaru, c/o Fujitsu Limited ,  Sasaki, Tsutomu, c/o Fujitsu Limited ,  Ishizaki, Hirokazu, c/o Fujitsu Limited ,  Okamura, Eiji, c/o Fujitsu Limited ,  Gofuku, Tatsuya, c/o Fujitsu Limited ,  Suzuki, Norihiko, c/o Yamagata Fujitsu Limited ,  Tohkairin, Koichi, c/o Yamagata Fujitsu Limited ,  Suzuki, Hirofumi, c/o Yamagata Fujitsu Limited ,  Endo, Kenji, c/o Yamagata Fujitsu Limited ,  Ono, Chihiro, c/o Yamagata Fujitsu Limited ,  Ohba, Kazuhide, c/o Yamagata Fujitsu Limited ,  Satoh, Atsushi, c/o Yamagata Fujitsu Limited ,  Takahashi, Eisaku, c/o Yamagata Fujitsu Limited ,  Tokairin, Takashi, c/o Yamagata Fujitsu Limited ,  Suda, Isao, c/o Yamagata Fujitsu Limited ,  Ono, Takahiro, c/o Yamagata Fujitsu Limited

IPC: G11B21/08

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

Abstract: 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. When the CPU doesn't execute a program in the RAM space, the execution of an idle program in the ROM space is allocated, thereby reducing an electric power consumption in an idle state by using an ROM.

Abstract translation: 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VCM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小功耗的ROM空间和大功率的RAM空间，并且存储每个特有的程序。 当CPU不在RAM空间中执行程序时，分配ROM空间中的空闲程序的执行，从而通过使用ROM来降低空闲状态下的电力消耗。