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1. 发明授权

US5847891A PRML regenerating apparatus 失效
公开(公告)号：US5847891A
公开(公告)日：1998-12-08
申请号：US714009
申请日：1996-09-13
申请人： Hideki Ohmori , Masahito Iwatsubo
发明人： Hideki Ohmori , Masahito Iwatsubo
IPC分类号： G11B5/00 , G11B20/10 , G11B20/14 , G11B27/30 , H04L7/033 , H04L7/04 , H04L25/06 , G11B5/035
CPC分类号： G11B27/3027 , G11B20/10009 , G11B20/1488 , H04L25/061 , G11B2005/0018 , H04L7/041 , H04L7/044
摘要： Disclosed is a PRML regenerating apparatus for regenerating a signal read by a head from a storage medium. This PRML regenerating apparatus has a waveform equalizing circuit for waveform-equalizing the read signal, a maximum-likelihood decoder for maximum-likelihood-decoding, after obtaining a determination value by comparing the equalized output with upper and lower slice levels, this determination value and a control circuit for setting variable a distance between the upper slice level and the lower slice level of the maximum-likelihood decoder. The distance between the upper and lower slice levels can be thereby set variable in accordance with an equalization characteristic. A ternary determination circuit of the maximum-likelihood decoder is constructed of a memory for storing a correspondence table of the equalized output and the upper or lower slice level versus the determination result and the next upper or lower slice level. The ternary determination circuit can be thereby actualized with a simple configuration.

2. 发明授权

US5570269A Magnetic disk module 失效
标题翻译：磁盘模块
公开(公告)号：US5570269A
公开(公告)日：1996-10-29
申请号：US268503
申请日：1994-06-30
申请人： Masayuki Korikawa , Toru Shinohara , Masahito Iwatsubo , Saori Yokoyama , Hideki Ohmori , Takasi Watanabe , Tsuneo Ohsugi
发明人： Masayuki Korikawa , Toru Shinohara , Masahito Iwatsubo , Saori Yokoyama , Hideki Ohmori , Takasi Watanabe , Tsuneo Ohsugi
IPC分类号： G11B25/04 , G11B33/12 , H05K7/14 , G06F1/16 , H01R9/00 , H05K5/00
CPC分类号： G11B33/121 , G11B33/122 , H05K7/1414
摘要： A magnetic disk module adapted to be inserted in a data storing device body which is in use. The module includes two sets of disk drive units and printed wiring boards in one housing so that are disk drive unit or printed wiring board can be easily attached or detached in one set while the other set is in an operating state. The module includes a first connector attached to the disk drive unit, a second connector attached to the printed wiring board, a third connector at the rear end of the housing for plug-in connection to a connector of a data storing device body, a fourth connector arranged in the housing for plug-in connection to the first connector, and a fifth connector arranged in the housing for plug-in connection to the second connector.
摘要翻译：一种适于插入正在使用的数据存储装置主体中的磁盘模块。该模块在一个外壳中包括两组磁盘驱动器单元和印刷电路板，使得在另一组处于工作状态时，磁盘驱动单元或印刷电路板可以容易地在一组中被安装或拆卸。该模块包括附接到盘驱动单元的第一连接器，附接到印刷线路板的第二连接器，在壳体的后端处的第三连接器，用于插入到数据存储装置主体的连接器，第四连接器连接器，其布置在壳体中用于插入连接到第一连接器;以及第五连接器，布置在壳体中用于插入连接到第二连接器。

3. 发明授权

US6002538A PRML regenerating apparatus having adjusted slice levels 失效
标题翻译： PRML再生装置具有调整的切片水平
公开(公告)号：US6002538A
公开(公告)日：1999-12-14
申请号：US400720
申请日：1995-03-08
申请人： Masahide Kanegae , Katutoshi Asai , Yoshihiro Hashimura , Hideki Ohmori , Masahito Iwatsubo , Masao Kondou , Tomoki Sugaya , Hiroyuki Tanaka
发明人： Masahide Kanegae , Katutoshi Asai , Yoshihiro Hashimura , Hideki Ohmori , Masahito Iwatsubo , Masao Kondou , Tomoki Sugaya , Hiroyuki Tanaka
IPC分类号： G11B5/00 , G11B20/10 , G11B20/14 , G11B27/30 , H04L7/033 , H04L7/04 , H04L25/06 , G11B5/09
CPC分类号： G11B27/3027 , G11B20/10009 , G11B20/1488 , H04L25/061 , G11B2005/0018 , H04L7/041 , H04L7/044
摘要： Disclosed is a PRML regenerating apparatus for regenerating a signal read by a head from a storage medium. This PRML regenerating apparatus has a waveform equalizing circuit for waveform-equalizing the read signal, a maximum-likelihood decoder for maximum-likelihood-decoding, after obtaining a determination value by comparing the equalized output with upper and lower slice levels, this determination value and a control circuit for setting variable a distance between the upper slice level and the lower slice level of the maximum-likelihood decoder. The distance between the upper and lower slice levels can be thereby set variable in accordance with an equalization characteristic. A ternary determination circuit of the maximum-likelihood decoder is constructed of a memory for storing a correspondence table of the equalized output and the upper or lower slice level versus the determination result and the next upper or lower slice level. The ternary determination circuit can be thereby actualized with a simple configuration.
摘要翻译：公开了一种用于从存储介质再生由头读取的信号的PRML再生装置。该PRML再生装置具有用于使读取信号波形均衡的波形均衡电路，用于最大似然解码的最大似然解码器，在通过将均衡输出与上限和下限电平进行比较而获得确定值之后，该确定值和控制电路，用于设定最大似然解码器的上限位电平和下限电平之间的距离。因此，可以根据均衡特性将上限和下限电平之间的距离设置为可变的。最大似然解码器的三元确定电路由用于存储均衡输出和上限或下限电平的对应表与存储器相关的确定结果和下一个上限或下限电平构成。因此可以用简单的结构实现三元确定电路。

4. 发明授权

US4967293A Multi-positioner magnetic disk storage apparatus having means for reducing mechanical vibration interference between positioners 失效
标题翻译：具有用于减少定位器之间的机械振动干扰的装置的多位置磁盘存储装置
公开(公告)号：US4967293A
公开(公告)日：1990-10-30
申请号：US228942
申请日：1988-08-05
申请人： Keiji Aruga , Yoshifumi Mizoshita , Masahito Iwatsubo , Toshifumi Hatagami
发明人： Keiji Aruga , Yoshifumi Mizoshita , Masahito Iwatsubo , Toshifumi Hatagami
IPC分类号： G11B5/55 , G11B5/596 , G11B33/14
CPC分类号： G11B33/14 , G11B5/5565 , G11B5/59655
摘要： A magnetic disk storage apparatus in which a plurality of magnetic head positioners are independently driven with respect to each other. A housing having a sensor secured thereto indirectly senses mechanical vibration of a magnetic disk and issues a sense signal. The mechanical vibration is inevitably caused by a seek operation of a selected magnetic head positioner. Based on the sense signal, a compensating signal is generated in a mechanical vibration follow-up system disposed in the apparatus. The compensating signal is input to a coil of a driving motor of non-selected magnetic head positioners such that the effect of the mechanical vibration on the other positioners is cancelled. Thus, magnetic heads supported by the other positioners do not become off-track.

5. 发明授权

US5293498A Arrangement of designation of drive element number using mother boards 失效
标题翻译：使用母板指定驱动元件编号
公开(公告)号：US5293498A
公开(公告)日：1994-03-08
申请号：US49879
申请日：1993-04-19
申请人： Masahito Iwatsubo
发明人： Masahito Iwatsubo
IPC分类号： G06F13/14
CPC分类号： G06F13/14
摘要： An arrangement of a designation of a drive element number using mother boards interposed between an upper grade device and a plurality of drive elements includes a plurality of groups of drive elements, each of which drive elements has a specifically designated drive element number, an upper grade device for carrying out a signal communication through tag bus line cables with a selected drive element, and a plurality of mother boards interposed between the upper grade device and the plurality of drive elements, each of the mother boards corresponding to one of the plurality of groups of drive elements. The plurality of mother boards has a same potential level arrangement of connection pins for a drive element number designation in connecting portions.
摘要翻译：使用介于高级装置和多个驱动元件之间的母板来指定驱动元件号的布置包括多组驱动元件，每组驱动元件具有专门指定的驱动元件号，高档用于通过具有所选择的驱动元件的标签总线电缆进行信号通信的设备，以及插入在所述上级设备和所述多个驱动元件之间的多个母板，每个母板对应于所述多个组中的一个组的驱动元件。多个母板在连接部分中具有用于驱动元件编号指定的连接销的相同电位电平布置。

6. 发明授权

US4978902A Synchronous rotation control system of magnetically recording disk 失效
标题翻译：磁记录盘同步旋转控制系统
公开(公告)号：US4978902A
公开(公告)日：1990-12-18
申请号：US150220
申请日：1988-01-29
申请人： Toshifumi Hatagami , Masahito Iwatsubo , Tooru Shinohara
发明人： Toshifumi Hatagami , Masahito Iwatsubo , Tooru Shinohara
IPC分类号： G11B5/55 , G11B19/28 , G11B27/30
CPC分类号： G11B5/5547 , G11B19/28 , G11B27/3027
摘要： A delay circuit which compensates for a variable phase output of an index signal by delaying the read out index signal. The delay time of the delay circuit depends on the cylinder on which a read/write head is located, and is chosen so that the delayed index signals are generated at an essentially constant phase angle with respect to a reference angular position. The delay circuit may include a counter which is pre-loaded with an address of the cylinder on which the head is located, and which counts number of clock pulses input to the counter. Overflowing of the counter generates the compensated index signal. Thus, synchronous operation of plural disk apparatus is accomplished, when the head seeks a new cylinder.

7. 发明授权

US4879498A DC motor drive system for reducing start-up current 失效
标题翻译：直流电机驱动系统，用于降低启动电流
公开(公告)号：US4879498A
公开(公告)日：1989-11-07
申请号：US184496
申请日：1988-06-06
申请人： Tooru Shinohara , Masahito Iwatsubo
发明人： Tooru Shinohara , Masahito Iwatsubo
IPC分类号： H02P1/18 , H02P6/20
CPC分类号： H02P1/18 , H02P6/20
摘要： A system for driving a constant current drive type DC motor a which enables the supply of a low power to switching elements in a constant current drive circuit therein during, and in particular, at start-up of the motor. The DC motor drive system includes a DC motor, a unit for detecting a rotation of a rotor of the motor, a power supply unit for supplying a drive power to the motor, and a current drive circuit providing a constant current passing through a coil of the motor supplied with the drive power during a normal operation of the motor. The power supply unit sequentially increases a voltage therefrom in multi-steps in response to the increase of the rotation during a start-up operation. The power supply unit may change the voltage supplied therefrom so that a maximum value of the current is sequentially increased during the start-up.
摘要翻译： PCT No.PCT / JP87 / 00585 Sec。 371日期：1988年6月6日 102（e）日期1988年6月6日PCT申请1987年8月5日PCT公布。出版物WO88 / 01111 PCT 日期：1988年2月11日。一种用于驱动恒流驱动型DC电动机a的系统，其能够在电动机的启动期间，特别是在电动机启动时向其中的恒定电流驱动电路中的开关元件供给低功率。直流电动机驱动系统包括直流电动机，用于检测电动机的转子的旋转的单元，向电动机供给驱动电力的电源单元和提供恒定电流通过线圈的电流驱动电路电机在电机正常运行期间提供驱动电源。响应于启动操作期间的旋转的增加，电源单元以多级顺序地增加其电压。电源单元可以改变从其提供的电压，使得在启动期间依次增加电流的最大值。

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