公开(公告)号：US5068753A

公开(公告)日：1991-11-26

申请号：US323943

申请日：1989-03-15

申请人： Masahide Kanegae

发明人： Masahide Kanegae

IPC分类号： G11B5/035 ,  G11B20/10

CPC分类号： G11B20/10046 ,  G11B20/10009 ,  G11B5/035

摘要： A data recording and reproducing circuit for a memory system, such as a magnetic disk memory system. The circuit includes a reflection type cosine equalizer and a data reproducing circuit. The equalizer includes a first equalizing circuit, having a first equalizing gain, and outputting a first equalized signal, and a second equalizing circuit having a second equalizing gain smaller than the first equalizing gain, and outputting a second equalizing circuit. The data reproducing circuit includes a differentiator for differentiating the first equalized signal, a window generating circuit for generating a window signal from the second equalized signal, and a data separator for discriminating the differentiated signal in response to the window signal to produce a pulsed reproduction signal.

公开(公告)号：US08027118B2

公开(公告)日：2011-09-27

申请号：US12843723

申请日：2010-07-26

申请人： Toru Ezawa ,  Shuichi Kojima ,  Masahide Kanegae ,  Kenichiro Yamada ,  Katsuhiko Koui ,  Masayuki Takagishi

发明人： Toru Ezawa ,  Shuichi Kojima ,  Masahide Kanegae ,  Kenichiro Yamada ,  Katsuhiko Koui ,  Masayuki Takagishi

IPC分类号： G11B21/02

CPC分类号： G11B5/09 ,  G11B5/02 ,  G11B5/1278 ,  G11B5/314 ,  G11B2005/0005 ,  G11B2005/0024 ,  G11B2220/2516

摘要： According to one embodiment, an apparatus for controlling a head includes a transmitting module and a controller. The transmitting module is configured to transmit a write signal to a magnetic head having a spin torque oscillator at the time of recording data. The controller is configured to supply a drive signal that has a level higher than the ordinary level for a prescribed effective time, to the spin-torque oscillator in response to an input write gate that instructs the recording of data. During a period other than prescribed effective time, the controller supplies a drive signal having the ordinary level to the spin-torque oscillator.

摘要翻译： 根据一个实施例，一种用于控制头部的装置包括发射模块和控制器。 发送模块被配置为在记录数据时向具有自旋转矩振荡器的磁头发送写入信号。 控制器被配置为响应于指示数据记录的输入写入门，向自旋转矩振荡器提供具有高于普通电平的电平达到规定有效时间的驱动信号。 在规定的有效时间以外的期间，控制器向自旋转矩振荡器提供具有普通电平的驱动信号。

公开(公告)号：US07463438B2

公开(公告)日：2008-12-09

申请号：US11043492

申请日：2005-01-26

申请人： Tatsuhiko Kosugi ,  Masahide Kanegae

发明人： Tatsuhiko Kosugi ,  Masahide Kanegae

IPC分类号： G11B27/36 ,  G11B5/09 ,  G11B21/02 ,  G11B5/596

CPC分类号： G11B5/59633 ,  G11B5/59666 ,  G11B27/36 ,  G11B2220/20

摘要： An information storage apparatus that records servo information and user data on a recording face of a recording medium wherein a track density measuring unit measures the optimal track density for a recording face corresponding to each head targeting a storage medium on which the servo information has not yet been recorded and a recording density measuring unit measures the optimal linear density for each recording face. A servo frame writing unit writes the servo information varying a track pitch to a track pitch corresponding to the optimal track density measured by the track density measuring unit and a recording frequency to a recording frequency corresponding to the optimal linear density measured by the linear density measuring unit, for each head.

摘要翻译： 一种信息存储装置，其将伺服信息和用户数据记录在记录介质的记录面上，其中轨道密度测量单元测量与针对其上还存在伺服信息的存储介质的每个磁头相对应的记录面的最佳磁道密度 记录密度测量单元测量每个记录面的最佳线密度。 伺服帧写入单元将将轨道间距改变为对应于由轨道密度测量单元测量的最佳轨道密度的轨道音调和记录频率的伺服信息写入对应于通过线性密度测量测量的最佳线性密度的记录频率 单位，每个头。

公开(公告)号：US20080100950A1

公开(公告)日：2008-05-01

申请号：US11895464

申请日：2007-08-24

申请人： Nobuyuki Mitsunaga ,  Masahide Kanegae ,  Hiroyuki Tanaka ,  Isamu Tomita ,  Masao Kondo

发明人： Nobuyuki Mitsunaga ,  Masahide Kanegae ,  Hiroyuki Tanaka ,  Isamu Tomita ,  Masao Kondo

IPC分类号： G11B21/02

CPC分类号： G11B19/041 ,  G11B5/6064 ,  G11B5/607

摘要： Upon recording, a clearance control unit performs preheating by an added control value (B+R) of a base heater control value B and an adjustment heater control value R and switches that to merely the base heater control value B when it reaches a target sector so as to perform write. Upon reproduction, preheating is performed by the added control value (B+R), and the added control value (B+R) is maintained when it reaches a target sector so as to perform read. A correction processing unit 46 detects contact (touchdown) between the head and a medium surface while gradually increasing the adjustment heater control value R from a predetermined initial value Ro, sets a value, which is obtained by subtracting a heater control value Sp converted from a minimum clearance and the initial value Ro from a contact heater control value Rtd, as the base heater control value B, and sets the initial value Ro as the adjustment heater control value R. Write assist adjustment in which the measured adjustment heater control value R is adjusted to a heater control value that improves characteristic deterioration immediately after recording is started wherein preheating is switched to write heating is performed.

摘要翻译： 在记录时，间隙控制单元通过基础加热器控制值B的附加控制值（B + R）和调节加热器控制值R执行预热，并且当其到达目标扇区时将其仅切换到基础加热器控制值B 以便执行写入。 在再现时，通过附加的控制值（B + R）进行预热，并且当其到达目标扇区时保持附加的控制值（B + R）以便进行读取。 校正处理单元46在从预定的初始值Ro逐渐增加调节加热器控制值R的同时检测头部和介质表面之间的接触（触地），设定通过减去从 作为基础加热器控制值B，将来自接触加热器控制值Rtd的最小间隙和初始值Ro设定为初始值Ro作为调节加热器控制值R.写入辅助调整，其中测量的调节加热器控制值R为 被调整到加热器控制值，其在开始其中预热切换到写入加热的记录开始之后立即改善特性劣化。

公开(公告)号：US6130793A

公开(公告)日：2000-10-10

申请号：US822426

申请日：1997-03-21

申请人： Hideki Ohmori ,  Masahide Kanegae ,  Isamu Tomita

发明人： Hideki Ohmori ,  Masahide Kanegae ,  Isamu Tomita

IPC分类号： G11B5/39 ,  G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/09 ,  G11B5/48 ,  G11B19/04 ,  G11B20/18 ,  G11B27/36 ,  G11B33/14

CPC分类号： G11B5/09 ,  G11B19/04 ,  G11B27/36 ,  G11B5/012 ,  G11B2005/0016 ,  G11B2220/20 ,  G11B33/14 ,  G11B5/4886

摘要： A thermal asperity detection method includes the steps of (a) converting an analog signal reproduced from a magnetic recording medium into a digital signal using an analog-to-digital converter, (b) detecting thermal asperity based on the digital signal, and (c) automatically recognizing and managing detection of the thermal asperity by the step (b) by firmware.

摘要翻译： 热凹凸检测方法包括以下步骤：（a）使用模数转换器将从磁记录介质再现的模拟信号转换为数字信号，（b）基于数字信号检测热不均匀性，和（c ）通过固件自动识别和管理步骤（b）的热不均匀检测。

公开(公告)号：US06124998A

公开(公告)日：2000-09-26

申请号：US1885

申请日：1997-12-31

申请人： Masahide Kanegae

发明人： Masahide Kanegae

IPC分类号： G11B5/09 ,  G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/035 ,  G11B19/04 ,  G11B19/06 ,  G11B33/14

CPC分类号： G11B19/04 ,  G11B19/06 ,  G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/035 ,  G11B2005/0013 ,  G11B33/14

摘要： A recording unit is provided, to which a write current is supplied in accordance with information to be stored. The recording unit records the information in a recording medium in accordance with the write current. A temperature detecting unit detects an ambient temperature of the recording medium. A timer monitors time for the temperature detecting unit to detect the ambient temperature of the recording medium at predetermined times. A write-current setting unit sets the write current for the ambient temperature of the recording medium detected by the temperature detecting unit, each time when the temperature detecting unit detects the ambient temperature of the recording medium, the time being obtained from the timer.

摘要翻译： 提供记录单元，根据要存储的信息向其提供写入电流。 记录单元根据写入电流将信息记录在记录介质中。 温度检测单元检测记录介质的环境温度。 定时器监视温度检测单元在预定时间内检测记录介质的环境温度的时间。 每当温度检测单元检测到记录介质的环境温度时，从定时器获得的时间，写入电流设置单元设置由温度检测单元检测到的记录介质的环境温度的写入电流。

公开(公告)号：US5675446A

公开(公告)日：1997-10-07

申请号：US353148

申请日：1994-12-09

申请人： Tatsuhiko Kosugi ,  Masahide Kanegae ,  Nobuyuki Suzuki

发明人： Tatsuhiko Kosugi ,  Masahide Kanegae ,  Nobuyuki Suzuki

IPC分类号： G11B19/02 ,  G11B5/012 ,  G11B19/12 ,  G11B21/08 ,  G11B25/04 ,  G11B33/12 ,  G11B5/02

CPC分类号： G11B5/012 ,  G11B19/02 ,  G11B19/12 ,  G11B25/043 ,  G11B33/121

摘要： A method of controlling a magnetic disk unit. The method controls the magnetic disk unit which comprises a disk enclosure part and a printed-circuit board part. The disk enclosure part includes at least one magnetic disk, at least one magnetic head and a mechanical part for driving each magnetic disk and each magnetic head. The printed-circuit board part includes a circuit part for controlling the disk enclosure part. The method includes the steps of writing on the magnetic disk version data indicating a type of disk enclosure part after the disk enclosure part and the printed-circuit board part are assembled, and automatically setting the circuit part of the printed-circuit board part depending on the version data which is read from the magnetic disk after the magnetic disk unit is completed.

摘要翻译： 一种控制磁盘单元的方法。 该方法控制包括盘盒部分和印刷电路板部分的磁盘单元。 盘盒部分包括至少一个磁盘，至少一个磁头和用于驱动每个磁盘和每个磁头的机械部件。 印刷电路板部件包括用于控制盘外壳部分的电路部分。 该方法包括以下步骤：在组装盘盒部分和印刷电路板部件之后，写入表示磁盘盒部分类型的磁盘版本数据，并根据来自自动设置印刷电路板部件的电路部分 在磁盘单元完成之后从磁盘读取的版本数据。

公开(公告)号：US5440434A

公开(公告)日：1995-08-08

申请号：US50170

申请日：1993-05-03

申请人： Masahide Kanegae

发明人： Masahide Kanegae

IPC分类号： A63C5/035 ,  A43B5/16 ,  A63C17/00 ,  A63C17/04 ,  A63C17/06 ,  A63C17/22 ,  G11B5/035 ,  G11B5/09 ,  G11B20/10 ,  G11B15/12

CPC分类号： G11B20/10046 ,  A63C17/064 ,  A63C17/226 ,  G11B20/10009 ,  G11B5/035 ,  G11B5/09

摘要： In a reproduced waveform equalizing circuit for thin-film magnetic heads for eliminating a negative edge of a thin-film magnetic head, even if there is a manufactural variation in thin-film magnetic heads, the negative edge is eliminated. In the reproduced waveform equalizing circuit, an operation circuit receives a readout output including a negative edge from a selected one of a plurality of thin-film magnetic heads and performs waveform equalization from the output of a delay circuit. The output delay circuit has an input side terminated with a characteristic impedance and provides a time delay of (.tau.2-.tau.1), the output of a multiplier (4) for multiplying a (J2-J1) delayed signal by K1 and the output of a delay amount changing circuit (6) for delaying an input signal to eliminate a negative edge. The waveform equalizing circuit is provided with a delay amount determining circuit for determining a delay time for elimination of a negative edge from a head select signal and a head position signal of the thin-film magnetic head 1, whereby a delay amount of the delay amount changing circuit is controlled by a delay amount indicating signal from the delay amount determining circuit.

摘要翻译： PCT No.PCT / JP92 / 01694 Sec。 371日期：1993年5月3日 102（e）日期1993年5月3日PCT提交1992年12月25日PCT公布。 公开号WO93 / 14493 日期：1992年7月22日。在用于消除薄膜磁头的负边缘的薄膜磁头的再现波形均衡电路中，即使在薄膜磁头中存在制造上的变化， 消除了 在再现波形均衡电路中，操作电路从多个薄膜磁头中选择的一个接收包括负沿的读出输出，并从延迟电路的输出进行波形均衡。 输出延迟电路具有以特性阻抗终止的输入端，并且提供（τ2-τ1）的时间延迟，用于将（J2-J1）延迟信号乘以K1的乘法器（4）的输出和输出 延迟量改变电路（6），用于延迟输入信号以消除负沿。 波形均衡电路设置有延迟量确定电路，用于根据磁头选择信号和薄膜磁头1的磁头位置信号来确定用于消除负边缘的延迟时间，由此延迟量的延迟量 改变电路由来自延迟量确定电路的延迟量指示信号控制。