公开(公告)号：US06765740B2

公开(公告)日：2004-07-20

申请号：US09956977

申请日：2001-09-21

申请人： Reijiro Tsuchiya

发明人： Reijiro Tsuchiya

IPC分类号： G11B1512

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/012 ,  G11B5/2652 ,  G11B5/3103 ,  G11B5/3909 ,  G11B5/3945 ,  G11B5/3948 ,  G11B5/3961 ,  G11B5/3967 ,  G11B5/488 ,  G11B5/4886 ,  G11B5/4984 ,  G11B20/18 ,  G11B2005/001 ,  G11B2005/0016 ,  G11B2005/3996 ,  G11B2020/183

摘要： A conventional magnetic head has a structure, in which a MR element and a recording element are stacked. The influence of a recording magnetic field on the magnetically sensitive portion of a reproduction element is lessened and the performance of the MR element is stabilized. Also, the reliability of the magnetic disk drive using a MR element is enhanced. The magnetic disk drive uses a composite magnet head, which has a plurality of reproduction elements arranged such that the magnetically sensitive layer of a reproduction element of the composite magnetic head does not overlap with the normal direction projection of the recording element, and which lessens the influence of a recording magnetic field on the magnetically sensitive portion of each reproduction element.

摘要翻译： 传统的磁头具有堆叠MR元件和记录元件的结构。 记录磁场对再现元件的磁敏部分的影响减小，并且MR元件的性能稳定。 此外，使用MR元件的磁盘驱动器的可靠性增强。 磁盘驱动器使用复合磁头，其具有多个再现元件，其布置成使得复合磁头的再现元件的磁敏层不与记录元件的法线方向投影重叠，并且减小了 记录磁场对每个再现元件的磁敏部分的影响。

公开(公告)号：US06657804B1

公开(公告)日：2003-12-02

申请号：US09451912

申请日：1999-12-01

申请人： Futoshi Tomiyama ,  Takehiko Hamaguchi ,  Toru Matsushita ,  Hideki Zaitsu ,  Reijiro Tsuchiya ,  Hisashi Takano

发明人： Futoshi Tomiyama ,  Takehiko Hamaguchi ,  Toru Matsushita ,  Hideki Zaitsu ,  Reijiro Tsuchiya ,  Hisashi Takano

IPC分类号： G11B1504

CPC分类号： G11B5/5526 ,  G11B5/59633

摘要： A magnetic recording disk drive can prevent the deterioration of the head off-track characteristics and the reduction of the drive performance even when an erase band asymmetry resulting from a skew angle exists. A write inhibit slice value for an inner peripheral side offset is made smaller than a write inhibit slice value for an outer peripheral side offset at a position where an erase band on the inner peripheral side is greater than an erase band on the outer peripheral side, so that the adjacent track on the outer peripheral side cannot easily erase a data track. On the contrary, the inner periphery and the outer periphery are paraphrased at a position where the erase band on the outer peripheral side is greater than the erase band on the inner peripheral side.

摘要翻译： 磁记录盘驱动器即使当存在由倾斜角度导致的擦除带不对称性时，也可以防止磁头偏离磁道特性的恶化和驱动性能的降低。 使内周侧偏移的写禁止限幅值小于在内周侧的擦除频带大于外周侧的擦除频带的位置处的外周侧偏移的写禁止限幅值， 使得外周侧的相邻轨道不能容易地擦除数据轨道。 相反，内周侧和外周侧在外周侧的擦除带大于内周侧的擦除带的位置被释义。

公开(公告)号：US06285520B1

公开(公告)日：2001-09-04

申请号：US09317609

申请日：1999-05-25

申请人： Tetsuya Makiura ,  Reijiro Tsuchiya

发明人： Tetsuya Makiura ,  Reijiro Tsuchiya

IPC分类号： G11B5035

CPC分类号： G11B19/04 ,  G11B5/012 ,  G11B5/035 ,  G11B20/10009 ,  G11B20/1816

摘要： In a magnetic disk device, a deterioration of performance caused by an environmental variation is suppressed by utilizing an automatic adaptation function in a read/write channel IC. A gate provides a timing for the automatic adaptation of an equalization coefficient, a signal from the gate is given to a read-gate input terminal of the read/write channel IC, and the gate for the automatic adaptation is opened before reading data from a destination sector to be read. The automatic adaptation is started, whereby coefficients for equalization are adapted to signal wave forms before reading data.

摘要翻译： 在磁盘装置中，通过利用读/写通道IC中的自动适应功能来抑制由环境变化引起的性能的劣化。 门提供用于均衡系数的自动调整的定时，来自门的信号被提供给读/写通道IC的读门输入端，并且用于自动适配的门在从 目的地扇区被读取。 开始自动适应，由此用于均衡的系数适于在读取数据之前对波形进行信号。

公开(公告)号：US6111715A

公开(公告)日：2000-08-29

申请号：US5008

申请日：1998-01-09

申请人： Reijiro Tsuchiya ,  Mikio Suzuki

发明人： Reijiro Tsuchiya ,  Mikio Suzuki

IPC分类号： G11B5/00 ,  G11B5/008 ,  G11B5/012 ,  G11B5/02 ,  G11B5/035 ,  G11B5/03 ,  G11B15/12

CPC分类号： G11B5/02 ,  G11B5/00813 ,  G11B5/012 ,  G11B5/035 ,  G11B2005/0008 ,  G11B2005/0018

摘要： A magnetic storage apparatus exploits the inherent characteristics of a magnetoresistive element to improve the performance of a magnetic head employing the element. Variations in element height or element thickness of the magnetoresistive element are considered in the selection of a sense current appropriate to the element size, by measuring the voltage between the terminals of the magnetoresistive head and controlling the sense current so that the output reference voltage approaches a predetermined value. In another embodiment, the sense current is controlled so that the voltage amplitude or a reference amplitude are set to a predetermined value. In both embodiments, a conversion table is preferably used to relate voltage amplitudes with sense currents, whereby an appropriate sense current is selected based upon the voltage amplitude.

摘要翻译： 磁存储装置利用磁阻元件的固有特性来改善使用元件的磁头的性能。 通过测量磁阻磁头的端子之间的电压并控制感测电流，使得输出参考电压接近于零，从而在选择适合于元件尺寸的感测电流时考虑磁阻元件的元件高度或元件厚度的变化 预定值。 在另一个实施例中，控制感测电流使得电压幅度或参考幅度被设置为预定值。 在两个实施例中，优选地使用转换表来将电压幅度与感测电流相关联，由此基于电压幅度来选择适当的感测电流。

公开(公告)号：US5459620A

公开(公告)日：1995-10-17

申请号：US286250

申请日：1994-08-08

申请人： Reijiro Tsuchiya

发明人： Reijiro Tsuchiya

IPC分类号： G11B5/09 ,  G11B20/10 ,  G11B20/14 ,  G11B20/18

CPC分类号： G11B20/10212 ,  G11B20/1816 ,  G11B20/182

摘要： An evaluation system for a signal waveform includes a first delay element for delaying a clock signal, a second delay element for delaying the output of the first delay element, and third and fourth delay elements for delaying the output of the second delay element. A first detector receives the output of the first delay element and the signal waveform for outputting binary data, a second detector receives the output of the second delay element and the signal waveform for outputting binary data, a third detector receives the output of the third delay element and the signal waveform for outputting binary data, and first, second and third shift registers receive output data of the first, second and third detectors and the output of the fourth delay element. A comparator unit compares data in the first, second and third shift register with a particular data pattern, and a counter counts output pulses of the comparator unit, the output of the second detector being output as a read data output. The distribution of peak pulses in a detection window is thereby determined.

摘要翻译： 用于信号波形的评估系统包括用于延迟时钟信号的第一延迟元件，用于延迟第一延迟元件的输出的第二延迟元件，以及用于延迟第二延迟元件的输出的第三和第四延迟元件。 第一检测器接收第一延迟元件的输出和用于输出二进制数据的信号波形，第二检测器接收第二延迟元件的输出和用于输出二进制数据的信号波形，第三检测器接收第三延迟的输出 元件和用于输出二进制数据的信号波形，第一，第二和第三移位寄存器接收第一，第二和第三检测器的输出数据和第四延迟元件的输出。 比较器单元将第一，第二和第三移位寄存器中的数据与特定数据模式进行比较，计数器对比较器单元的输出脉冲进行计数，第二检测器的输出作为读取数据输出输出。 由此确定检测窗口中的峰值脉冲的分布。

公开(公告)号：US20050134990A1

公开(公告)日：2005-06-23

申请号：US10964698

申请日：2004-10-15

申请人： Reijiro Tsuchiya

发明人： Reijiro Tsuchiya

IPC分类号： G11B5/09 ,  G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/265 ,  G11B5/29 ,  G11B5/31 ,  G11B5/39 ,  G11B5/48 ,  G11B5/49 ,  G11B20/18 ,  G11B15/12 ,  G11B5/127

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/012 ,  G11B5/2652 ,  G11B5/3103 ,  G11B5/3909 ,  G11B5/3945 ,  G11B5/3948 ,  G11B5/3961 ,  G11B5/3967 ,  G11B5/488 ,  G11B5/4886 ,  G11B5/4984 ,  G11B20/18 ,  G11B2005/001 ,  G11B2005/0016 ,  G11B2005/3996 ,  G11B2020/183

摘要： A conventional magnetic head has a structure, in which a MR element and a recording element are stacked. The influence of a recording magnetic field on the magnetically sensitive portion of a reproduction element is lessened and the performance of the MR element is stabilized. Also, the reliability of the magnetic disk drive using a MR element is enhanced. The magnetic disk drive uses a composite magnet head, which has a plurality of reproduction elements arranged such that the magnetically sensitive layer of a reproduction element of the composite magnetic head does not overlap with the normal direction projection of the recording element, and which lessens the influence of a recording magnetic field on the magnetically sensitive portion of each reproduction element.

摘要翻译： 传统的磁头具有堆叠MR元件和记录元件的结构。 记录磁场对再现元件的磁敏部分的影响减小，并且MR元件的性能稳定。 此外，使用MR元件的磁盘驱动器的可靠性增强。 磁盘驱动器使用复合磁头，其具有多个再现元件，其布置成使得复合磁头的再现元件的磁敏层不与记录元件的法线方向投影重叠，并且减小了 记录磁场对每个再现元件的磁敏部分的影响。

公开(公告)号：US06816344B2

公开(公告)日：2004-11-09

申请号：US09956976

申请日：2001-09-21

申请人： Reijiro Tsuchiya

发明人： Reijiro Tsuchiya

IPC分类号： G11B539

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/012 ,  G11B5/2652 ,  G11B5/3103 ,  G11B5/3909 ,  G11B5/3945 ,  G11B5/3948 ,  G11B5/3961 ,  G11B5/3967 ,  G11B5/488 ,  G11B5/4886 ,  G11B5/4984 ,  G11B20/18 ,  G11B2005/001 ,  G11B2005/0016 ,  G11B2005/3996 ,  G11B2020/183

摘要： A conventional magnetic head has a structure, in which a MR element and a recording element are stacked. The influence of a recording magnetic field on the magnetically sensitive portion of a reproduction element is lessened and the performance of the MR element is stabilized. Also, the reliability of the magnetic disk drive using a MR element is enhanced. The magnetic disk drive uses a composite magnetic head, which has a plurality of reproduction elements arranged such that the magnetically sensitive layer of a reproduction element of the composite magnetic head does not overlap with the normal direction projection of the recording element, and which lessens the influence of a recording magnetic field on the magnetically sensitive portion of each reproduction element.

摘要翻译： 传统的磁头具有堆叠MR元件和记录元件的结构。 记录磁场对再现元件的磁敏部分的影响减小，并且MR元件的性能稳定。 此外，使用MR元件的磁盘驱动器的可靠性增强。 磁盘驱动器使用复合磁头，其具有多个再现元件，其被布置成使得复合磁头的再现元件的磁敏层不与记录元件的法线方向投影重叠，并且减小了 记录磁场对每个再现元件的磁敏部分的影响。

公开(公告)号：US06512648B1

公开(公告)日：2003-01-28

申请号：US09634994

申请日：2000-08-08

申请人： Reijiro Tsuchiya ,  Mikio Suzuki

发明人： Reijiro Tsuchiya ,  Mikio Suzuki

IPC分类号： G11B503

CPC分类号： G11B5/02 ,  G11B5/00813 ,  G11B5/012 ,  G11B5/035 ,  G11B2005/0008 ,  G11B2005/0018

摘要： A magnetic storage apparatus exploits the inherent characteristics of a magnetoresistive element to improve the performance of a magnetic head employing the element. Variations in element height or element thickness of the magnetoresistive element are considered in the selection of a sense current appropriate to the element size, by measuring the voltage between the terminals of the magnetoresistive head and controlling the sense current so that the output reference voltage approaches a predetermined value. In another embodiment, the sense current is controlled so that the voltage amplitude or a reference amplitude are set to a predetermined value. In both embodiments, a conversion table is preferably used to relate voltage amplitudes with sense currents, whereby an appropriate sense current is selected based upon the voltage amplitude.

摘要翻译： 磁存储装置利用磁阻元件的固有特性来改善使用元件的磁头的性能。 通过测量磁阻磁头的端子之间的电压并控制感测电流，使得输出参考电压接近于零，从而在选择适合于元件尺寸的感测电流时考虑磁阻元件的元件高度或元件厚度的变化 预定值。 在另一个实施例中，控制感测电流使得电压幅度或参考幅度被设置为预定值。 在两个实施例中，优选地使用转换表来将电压幅度与感测电流相关联，由此基于电压幅度来选择适当的感测电流。

公开(公告)号：US6130797A

公开(公告)日：2000-10-10

申请号：US913835

申请日：1997-09-16

申请人： Kyo Akagi ,  Yoshihiro Shiroishi ,  Reijiro Tsuchiya ,  Takehiko Hamaguchi ,  Masuo Umemoto ,  Mikio Suzuki ,  Takashi Kawabe ,  Katsuro Watanabe ,  Kiyoshi Matsumoto ,  Atsushi Saito ,  Kouichirou Wakabayashi ,  Yosuke Hamada

发明人： Kyo Akagi ,  Yoshihiro Shiroishi ,  Reijiro Tsuchiya ,  Takehiko Hamaguchi ,  Masuo Umemoto ,  Mikio Suzuki ,  Takashi Kawabe ,  Katsuro Watanabe ,  Kiyoshi Matsumoto ,  Atsushi Saito ,  Kouichirou Wakabayashi ,  Yosuke Hamada

IPC分类号： G11B5/596 ,  G11B7/095 ,  G11B11/105

CPC分类号： G11B5/59655 ,  G11B11/10576 ,  G11B5/59627 ,  G11B11/10578 ,  G11B7/0953

摘要： Virtual tracks are set so that the rotation center of a magnetic recording medium or the vicinity of the rotation center coincides with the track center of the data information, and positioning servo control is performed. Thus, since it is not necessary to faithfully follow the track center line specified by the servo information that is previously recorded on the magnetic recording medium or magnetooptical recording medium, a vibration is not easily caused in synchronism with the rotation. Therefore, when the rotation center and the pattern center are deviated from each other, since a vibration is not caused in synchronism with the rotation, the magnetic head of the magnetic recorder or the magnetooptical head of the magnetooptical recorder is able to follow tracks with higher precision. Accordingly, the recording density can be increased.

摘要翻译： PCT No.PCT / JP95 / 00474 Sec。 371日期1997年9月17日 102（e）1997年9月17日PCT 1995年3月17日PCT公布。 公开号WO96 / 29700 日期1996年9月26日设置虚拟磁道，使得磁记录介质的旋转中心或旋转中心附近与数据信息的轨道中心一致，并执行定位伺服控制。 因此，由于不需要忠实地跟踪由先前记录在磁记录介质或磁光记录介质上的伺服信息指定的轨道中心线，因此不易与旋转同步地产生振动。 因此，当旋转中心和图案中心彼此偏离时，由于不会与旋转同步地产生振动，磁记录器的磁头或磁光记录器的磁光头能够跟随具有更高的轨迹 精确。 因此，可以提高记录密度。

公开(公告)号：US5786952A

公开(公告)日：1998-07-28

申请号：US562203

申请日：1995-11-22

申请人： Masuo Umemoto ,  Yoshihiro Shiroishi ,  Reijiro Tsuchiya ,  Kyo Akagi ,  Takehiko Hamaguchi ,  Takashi Kawabe ,  Atsushi Saito ,  Kouichirou Wakabayashi

发明人： Masuo Umemoto ,  Yoshihiro Shiroishi ,  Reijiro Tsuchiya ,  Kyo Akagi ,  Takehiko Hamaguchi ,  Takashi Kawabe ,  Atsushi Saito ,  Kouichirou Wakabayashi

IPC分类号： G11B5/012 ,  G11B5/035 ,  G11B5/09 ,  G11B5/48 ,  G11B5/49 ,  G11B5/55 ,  G11B5/596 ,  G11B20/10

CPC分类号： G11B5/59633 ,  G11B20/10009 ,  G11B5/012 ,  G11B5/09 ,  G11B5/4886 ,  G11B5/4976 ,  G11B5/5526 ,  G11B5/035

摘要： A magnetic digital storage method and system which can improve a recording density and can reduce a cross-talk upon reproducing. An inputted high-speed digital signal is converted to a plurality of low-speed digital signal sequences by a recording circuit and each of the low-speed signal sequence is recorded onto a plurality of adjacent recorded tracks of a recording medium by integrated parallel recording heads. One servo signal is commonly recorded to the plurality of recorded tracks. Further, when recording the digital signal to the adjacent recorded tracks of the recording medium, a delay of a signal that is applied to each recording head is adjusted such that the phases of magnetic transition points given by the recording signal in the adjacent recorded tracks are not identical in the circumferential direction.

摘要翻译： 一种磁数字存储方法和系统，其可以提高记录密度并且可以在再现时减少串扰。 输入的高速数字信号通过记录电路转换成多个低速数字信号序列，并且每个低速信号序列通过集成并行记录头记录在记录介质的多个相邻的记录磁道上 。 一个伺服信号通常记录到多个记录的轨道。 此外，当将数字信号记录到记录介质的相邻记录磁道时，调整施加到每个记录头的信号的延迟，使得由相邻记录磁道中的记录信号给出的磁转变点的相位为 在圆周方向上不相同。