公开(公告)号：US06377411B1

公开(公告)日：2002-04-23

申请号：US09385731

申请日：1999-08-30

申请人： Makoto Katsumata ,  Kenji Tsuruta ,  Katsuhiko Kaida

发明人： Makoto Katsumata ,  Kenji Tsuruta ,  Katsuhiko Kaida

IPC分类号： G11B509

CPC分类号： G11B5/455 ,  G11B5/012 ,  G11B5/02 ,  G11B5/40 ,  G11B5/4806 ,  G11B19/04 ,  G11B33/121 ,  G11B33/122 ,  G11B2005/0016 ,  G11B2005/0018

摘要： A head suspension assembly for use in a magnetic disk drive includes a magnetic head constituted by a magnetoresistive element for reading data and a head element for writing data, a slider for holding the magnetic head above a surface of a rotating magnetic recording medium, a suspension for supporting the slider, and a head integrated circuit mounted on the suspension. The head integrated circuit having a built-in protection circuit electrically connected with the magnetoresistive element to protect the magnetoresistive element from electrostatic breakdown. Thereby, the magnetic head can be efficiently prevented from suffering electrostatic breakdown due to, e.g., electrostatic discharge occurring during the assembly process of incorporating the head suspension assembly into the magnetic disk drive.

摘要翻译： 用于磁盘驱动器的头悬挂组件包括由用于读取数据的磁阻元件和用于写入数据的头元件构成的磁头，用于将磁头保持在旋转磁记录介质的表面上方的滑块，悬架 用于支撑滑块，以及安装在悬架上的头部集成电路。 磁头集成电路具有与磁阻元件电连接的内置保护电路，以保护磁阻元件免受静电破坏。 由此，可以有效地防止磁头由于在将磁头悬架组件并入磁盘驱动器的组装过程中发生的静电放电而遭受静电击穿。

公开(公告)号：US5585701A

公开(公告)日：1996-12-17

申请号：US351131

申请日：1994-11-30

申请人： Katsuhiko Kaida ,  Hidemichi Kiuchi ,  Tetsuji Sakurai

发明人： Katsuhiko Kaida ,  Hidemichi Kiuchi ,  Tetsuji Sakurai

IPC分类号： H02P6/10 ,  G01R19/00 ,  G01R31/42 ,  H02P6/08 ,  H02P29/00 ,  H02P6/02

CPC分类号： H02P6/085 ,  G01R19/0092 ,  H02P29/40 ,  G01R31/42

摘要： A circuit for generating a mirror current is provided, separately from a circuit for supplying a drive current. The mirror current generating circuit generates a mirror current of a predetermined ratio to the generated drive current. A circuit for detecting a current detects the mirror current. On the basis of the detected mirror current, the operation of a predetermined FET is controlled, and the amount of the drive current to be supplied to a motor is controlled. Thus, a decrease in the drive current due to a current source-side voltage loss can be prevented. In addition, power consumption due to current detection can be reduced, and as a result the drive current can be supplied efficiently.

摘要翻译： 与用于提供驱动电流的电路分开地提供用于产生镜电流的电路。 反射镜电流产生电路产生与所产生的驱动电流相关的预定比率的反射镜电流。 用于检测电流的电路检测反射镜电流。 基于检测到的反射镜电流，控制预定FET的操作，并且控制供给到电动机的驱动电流的量。 因此，可以防止由于电流源侧电压损失引起的驱动电流的降低。 此外，可以减少由于电流检测引起的功耗，结果可以有效地提供驱动电流。

公开(公告)号：US5206567A

公开(公告)日：1993-04-27

申请号：US750413

申请日：1991-08-27

申请人： Tetsuji Sakurai ,  Hideo Masaki ,  Katsuhiko Kaida

发明人： Tetsuji Sakurai ,  Hideo Masaki ,  Katsuhiko Kaida

IPC分类号： H02P6/20 ,  H02P6/22

CPC分类号： H02P6/22 ,  H02P6/20

摘要： When a sensorless and brushless DC motor is started, the rotor having a magnet is positioned by first exciting one pair of motor coils and then exciting another pair motor coils. The excitation of the motor coils is repeated until the rotor stops vibrating. Further, the positions of the magnetic poles of the rotor are detected by comparing the back electromotive force produced in each motor coil with the voltage generated in common to all motor coils. The rotation speed of the rotor is acquired from both the positions of the magnetic poles and the one cycle period of a signal representing the position of the rotor. A suitable delay time corresponding to the acquired rotation speed is determined, and the excitation phases are switched in accordance with the suitable delay time.

摘要翻译： 当无传感器和无刷直流电动机启动时，具有磁体的转子通过首先激励一对电动机线圈然后激励另一对电动机线圈来定位。 重复电动机线圈的激励，直到转子停止振动。 此外，通过将每个电动机线圈中产生的反电动势与对所有电动机线圈共同产生的电压进行比较来检测转子的磁极的位置。 转子的旋转速度从表示转子位置的信号的磁极位置和一个周期的两个位置获得。 确定对应于所获取的转速的合适的延迟时间，并且根据适当的延迟时间切换励磁相位。

公开(公告)号：US5327052A

公开(公告)日：1994-07-05

申请号：US857963

申请日：1992-03-26

申请人： Tetsuji Sakurai ,  Hideo Masaki ,  Katsuhiko Kaida ,  Takahiro Koyanagi

发明人： Tetsuji Sakurai ,  Hideo Masaki ,  Katsuhiko Kaida ,  Takahiro Koyanagi

IPC分类号： H02P6/18 ,  H02P6/20 ,  H02P6/02 ,  H02P1/18

CPC分类号： H02P6/20

摘要： When a brushless DC (direct current) motor is started to rotate a rotor, a normal current value is set and then a motor drive current corresponding to the set normal current value is supplied to the brushless DC motor. If the brushless DC motor is not started by this motor drive current, the current value to be set is increased at a desired rate, and a motor drive current corresponding to the increased current value is supplied to the brushless DC motor. That is, the motor drive current corresponding to the current value increased at a desired rate is sequentially supplied to the brushless DC motor until the brushless DC motor has started.

摘要翻译： 当开始无刷DC（直流）电动机转动转子时，设定正常电流值，然后将与设定的正常电流值对应的电动机驱动电流提供给无刷直流电动机。 如果通过该电动机驱动电流不起动无刷直流电动机，则要设定的电流值以期望的速率增加，并且与增加的电流值相对应的电动机驱动电流被提供给无刷直流电动机。 也就是说，对应于以所需速率增加的电流值的电动机驱动电流被顺序提供给无刷直流电动机，直到无刷直流电动机起动为止。

公开(公告)号：US5282099A

公开(公告)日：1994-01-25

申请号：US753054

申请日：1991-08-30

申请人： Seiji Kawagoe ,  Katsuhiko Kaida

发明人： Seiji Kawagoe ,  Katsuhiko Kaida

IPC分类号： G11B25/04 ,  G11B33/12 ,  G11B33/14 ,  H05K1/00 ,  H05K1/05 ,  H05K1/14

CPC分类号： G11B33/121 ,  G11B33/122 ,  G11B33/14 ,  H05K1/0284 ,  H05K1/05 ,  H05K1/14 ,  Y10S360/90

摘要： A hard disk drive includes a housing formed of a conductive material, and mechanical components housed in the housing. An electronic circuit for driving and controlling the mechanical components is housed in the housing. The drive circuit section has an insulating layer coated on the inner surface of the housing, a printed circuit formed on the insulating layer and having a desired pattern, and electronic parts mounted on the printed circuit. The drive circuit section uses the walls of the housing as a support base.

摘要翻译： 硬盘驱动器包括由导电材料形成的壳体和容纳在壳体中的机械部件。 用于驱动和控制机械部件的电子电路容纳在壳体中。 驱动电路部分具有涂覆在壳体的内表面上的绝缘层，形成在绝缘层上并具有所需图案的印刷电路以及安装在印刷电路上的电子部件。 驱动电路部分使用壳体的壁作为支撑基座。

公开(公告)号：US5270878A

公开(公告)日：1993-12-14

申请号：US721894

申请日：1991-06-27

申请人： Katsuhiko Kaida ,  Hideo Masaki

发明人： Katsuhiko Kaida ,  Hideo Masaki

IPC分类号： G11B5/09 ,  G11B20/10 ,  G11B27/30 ,  G11B2/09

CPC分类号： G11B5/09 ,  G11B20/10009 ,  G11B27/3027

摘要： In a magnetic recording and reproducing apparatus, in order to prevent the address code data for identifying the cylinder number of a recording medium from producing continuous erase data, address code data with a gray code arrangement is modulated by a predetermined modulation method, and the modulated address code data is recorded on the recording medium. In this case, address clocks are recorded on the recording medium at predetermined intervals by the magnetization change in a predetermined direction. After the address clocks are recorded, the address data are recorded by the magnetization change in a direction opposite to the predetermined direction.

摘要翻译： 在磁记录和再现装置中，为了防止用于识别记录介质的气缸数的地址代码数据产生连续的擦除数据，用预定的调制方法调制具有灰度排列的地址码数据，并且调制 地址码数据被记录在记录介质上。 在这种情况下，通过预定方向的磁化变化，地址时钟以预定间隔被记录在记录介质上。 在地址时钟被记录之后，通过与预定方向相反的方向的磁化变化记录地址数据。

公开(公告)号：US06738214B2

公开(公告)日：2004-05-18

申请号：US09955959

申请日：2001-09-20

申请人： Kiyoshi Ishiyama ,  Katsuhiko Kaida

发明人： Kiyoshi Ishiyama ,  Katsuhiko Kaida

IPC分类号： G11B2102

CPC分类号： G11B19/04 ,  G11B33/08

摘要： A 2-axis acceleration sensor has two detection axes (X- and Y-axes), and detects a dynamic acceleration (shock) and a static acceleration (a change in gravity or tilt). A sensor output extraction unit acquires detection signals corresponding to the static acceleration for respective detection axes by extracting frequency components lower than a frequency component associated with the dynamic acceleration. A CPU determines whether the disk drive is dropping, whether it has a tilt, and so forth, based on the acquired detection signals for respective detection axes, and causes a magnetic head to be retracted to the position of a ramp if such state is detected.

摘要翻译： 2轴加速度传感器具有两个检测轴（X轴和Y轴），并检测动态加速度（冲击）和静态加速度（重力或倾斜度的变化）。 传感器输出提取单元通过提取低于与动态加速度相关联的频率分量的频率分量来获取与各个检测轴的静态加速度对应的检测信号。 CPU根据取得的各检测轴的检测信号，判断磁盘驱动器是否下降，是否有倾斜等，如果检测到这种状态，则磁头将被缩回到斜坡的位置 。

公开(公告)号：US5373403A

公开(公告)日：1994-12-13

申请号：US827623

申请日：1992-01-29

申请人： Hiroshi Okamura ,  Hideo Masaki ,  Tetsuji Sakurai ,  Katsuhiko Kaida ,  Takahiro Koyanagi

发明人： Hiroshi Okamura ,  Hideo Masaki ,  Tetsuji Sakurai ,  Katsuhiko Kaida ,  Takahiro Koyanagi

IPC分类号： G11B21/10 ,  G11B5/55 ,  G11B19/02 ,  G11B19/04 ,  G11B5/02 ,  G11B5/09 ,  G11B15/52 ,  G11B20/12

CPC分类号： G11B19/04 ,  G11B19/02 ,  G11B5/5534

摘要： In a sector servo type hard-disk apparatus, in the case where a recording medium is not manufacture-formatted, gain control data is written/read in/from a CSS zone of the recording medium after power is turned on and before the first seek is executed. The write/read of the gain control data in/from the CSS zone is also executed in accordance with a peak level of an output signal from an AGC amplifier.

摘要翻译： 在扇区伺服型硬盘装置中，在记录介质不是制造格式化的情况下，增益控制数据在电源接通之后和在第一次寻找之前从记录介质的CSS区域写入/读取 被执行。 根据来自AGC放大器的输出信号的峰值电平，还对来自CSS区域的增益控制数据进行写入/读出。

公开(公告)号：US5208711A

公开(公告)日：1993-05-04

申请号：US547204

申请日：1990-07-03

申请人： Shunji Kitamura ,  Katsuhiko Kaida

发明人： Shunji Kitamura ,  Katsuhiko Kaida

IPC分类号： G11B21/10 ,  G11B5/596

CPC分类号： G11B5/59611

摘要： In a head driving control apparatus used, for example, in a hard disc drive, a peak detector detects a peak value of a servo signal output from a data head. A CPU detects a thermal off-track distance L of the data head, on the basis of the peak value of the servo signal. When the thermal off-track distance L is within an allowable off-track distance Lw in a data write mode or within an allowable off-track distance Lc in a data read mode, the CPU enables a data write operation or a data read operation. When the thermal off-track distance L is without the allowable off-track distance Lw in the data write mode or without the allowable off-track distance Lc in the data read mode, the CPU prohibits the data write operation or the data read operation.

摘要翻译： 在例如硬盘驱动器中使用的磁头驱动控制装置中，峰值检测器检测从数据磁头输出的伺服信号的峰值。 CPU根据伺服信号的峰值检测数据头的热离线距离L. 当热离线磁道距离L处于数据写入模式中允许的离轨距离Lw或数据读取模式中允许的离开磁道距离Lc时，CPU使能数据写入操作或数据读取操作。 当热离线磁道距离L在数据写入模式下没有允许的离开磁道距离Lw，或者在数据读取模式下没有允许的离开磁道距离Lc时，CPU禁止数据写入操作或数据读取操作。

公开(公告)号：US4772964A

公开(公告)日：1988-09-20

申请号：US932021

申请日：1986-11-18

申请人： Katsuhiko Kaida

发明人： Katsuhiko Kaida

IPC分类号： G11B5/012 ,  G11B5/02 ,  G11B5/09

CPC分类号： G11B5/012 ,  G11B5/02

摘要： A recorded data reproducing apparatus according to the invention includes a memory section having a gain data table for storing gain data determined in accordance with a cylinder position above a recording medium. Using the data representing the current cylinder position, the optimum gain data is determined from the gain data table, and supplied to a read pulse generator section under control by a control section. With this arrangement, the gain adjusting circuit is simplified, and the gain adjustment process is also simplified.

摘要翻译： 根据本发明的记录数据再现装置包括：存储器部分，具有用于存储根据记录介质上方的气缸位置确定的增益数据的增益数据表。 使用表示当前气缸位置的数据，从增益数据表确定最佳增益数据，并在控制部分控制下提供给读取脉冲发生器部分。 利用这种布置，增益调整电路被简化，并且增益调整处理也被简化。