公开(公告)号：US5507005A

公开(公告)日：1996-04-09

申请号：US852563

申请日：1992-03-17

申请人： Akira Kojima ,  Tsuneo Hirose ,  Norikazu Takayama ,  Mitsuru Kubo ,  Atsushi Takayasu

发明人： Akira Kojima ,  Tsuneo Hirose ,  Norikazu Takayama ,  Mitsuru Kubo ,  Atsushi Takayasu

IPC分类号： G06F3/06 ,  G06F5/06 ,  G06F13/38 ,  G06F13/40 ,  G06F12/00

CPC分类号： G06F3/0601 ,  G06F13/4059 ,  G06F2003/0691

摘要： A data transfer control apparatus for communicating data between a host device and an input/output device through a main buffer memory for temporarily holding the data, wherein a sub-buffer memory is disposed at least either between the main buffer memory and the host device or between the main buffer memory and the input/output device for temporarily storing the data, the amount of data stored in the sub-buffer memory is detected, access requests to the main buffer memory on the side of the host device or the input/output device are outputted in accordance with the detected data amount, and one of the access requests to the main buffer memory is selected in accordance with the priority order to access the main buffer memory on the basis of the selected access request.

摘要翻译： 一种用于通过用于临时保存数据的主缓冲存储器在主机设备和输入/输出设备之间传送数据的数据传输控制设备，其中副缓冲存储器至少设置在主缓冲存储器和主机设备之间，或者 在主缓冲存储器和用于临时存储数据的输入/输出装置之间，检测存储在子缓冲存储器中的数据量，主机装置侧的主缓冲存储器的访问请求或输入/输出 根据检测到的数据量输出设备，并且根据优先顺序选择对主缓冲存储器的访问请求中的一个，以便根据所选择的访问请求访问主缓冲存储器。

公开(公告)号：US5313340A

公开(公告)日：1994-05-17

申请号：US823299

申请日：1992-01-21

申请人： Norikazu Takayama ,  Tsuneo Hirose ,  Akira Kojima

发明人： Norikazu Takayama ,  Tsuneo Hirose ,  Akira Kojima

IPC分类号： G11B5/012 ,  G11B19/02 ,  G11B20/10 ,  G11B20/12 ,  G11B5/09

CPC分类号： G11B19/02 ,  G11B20/10 ,  G11B5/012

摘要： The present invention relates to a magnetic disk control apparatus capable of utilizing a data region of a track. The data read/write controlling apparatus according to the present invention comprises a unit for serially reading a signal series constructed of a servo signal and data which has been recorded on a recording track; a unit for generating a first read/ write control signal in response to the servo signal of the read signal series; a unit for generating a second read/write control signal between the generation of the servo signal and a generation of a servo signal subsequent to the first-mentioned signal; a unit for writing given data into the data region of the recording track in response to the generation of the read/write control signal; and a unit for externally outputting data read out just after the read/write control signal is generated.

摘要翻译： 本发明涉及能够利用轨道的数据区域的磁盘控制装置。 根据本发明的数据读/写控制装置包括用于串行读取由伺服信号构成的信号序列和已经记录在记录轨道上的数据的单元; 用于响应于读取信号序列的伺服信号产生第一读/写控制信号的单元; 用于在所述伺服信号的产生和所述第一提到的信号之后产生伺服信号时产生第二读/写控制信号的单元; 响应于所述读/写控制信号的产生将给定数据写入所述记录轨道的数据区的单元; 以及用于外部输出在产生读/写控制信号之后读出的数据的单元。

公开(公告)号：US5012166A

公开(公告)日：1991-04-30

申请号：US460990

申请日：1990-01-04

申请人： Nobuyoshi Ushijima ,  Hiroshi Masuda ,  Akira Ishibashi ,  Masahiko Satou ,  Toshiyuki Haruna ,  Norikazu Takayama ,  Yoshinobu Kudou

发明人： Nobuyoshi Ushijima ,  Hiroshi Masuda ,  Akira Ishibashi ,  Masahiko Satou ,  Toshiyuki Haruna ,  Norikazu Takayama ,  Yoshinobu Kudou

IPC分类号： G11B19/20 ,  G11B19/28

CPC分类号： G11B19/2009 ,  G11B19/28

摘要： A control method for brushless DC motor having a rotor, a plurality of magnetic poles and coils of a plurality of phases involves sequentially applying a current to one phase for a prescribed time, stopping the current temporarily and then reapplying the current to the same phase. The state of the rise of the current when it begins to flow to the phase, is measured. The position of one of the magnetic poles located at a position opposite to the particular phase is detected based on the measured state of the rise of the current. In response to the position of the magnetic pole, it is determined whether the flow of the current is to be switched over to the following phase or not. If so, the current is switched over the following phase and the process is repeated. Constant speed control may be accomplished by reading information from a driven disk to determine speed, comparing the speed to a fixed speed, and selectively applying by time sharing a normal current, a brake current and an acceleration current.

摘要翻译： 具有转子，多个磁极和多相的线圈的无刷直流电动机的控制方法涉及顺序地向一相施加电流达规定时间，暂时停止电流，然后将电流重新施加到同一相位。 测量当电流开始流向相的上升状态。 基于测量的电流上升的状态，检测位于与特定相位相反的位置的一个磁极的位置。 响应于磁极的位置，确定电流的流动是否切换到后续阶段。 如果是，则将电流切换到以下阶段，并重复该过程。 可以通过从驱动盘读取信息来确定速度，将速度与固定速度进行比较，并且通过分配正常电流，制动电流和加速电流的时间选择性地施加来实现恒速控制。

公开(公告)号：US4984100A

公开(公告)日：1991-01-08

申请号：US380199

申请日：1989-07-14

申请人： Norikazu Takayama ,  Nobuyoshi Ushijima ,  Tetsuzo Kobashi ,  Masahiko Sato ,  Yoshihiko Yano ,  Jun Isozaki ,  Kousuke Fujii ,  Yoshinobu Kudoh

发明人： Norikazu Takayama ,  Nobuyoshi Ushijima ,  Tetsuzo Kobashi ,  Masahiko Sato ,  Yoshihiko Yano ,  Jun Isozaki ,  Kousuke Fujii ,  Yoshinobu Kudoh

IPC分类号： G11B5/596 ,  G11B20/14 ,  G11B27/30

CPC分类号： G11B5/59655 ,  G11B20/1426 ,  G11B27/3027

摘要： A method of forming servo information in a magnetic disk apparatus of a sector servo system. Servo information is recorded in advance at the beginning of each of the sectors, and includes a DC erase signal, a track address signal and a burst signal. The track address signal indicates on which track of the magnetic disk the sector is located, and is formed by expressing the track address in Gray code and interleaving a dummy code into the Gray code. Servo information is recorded using an NRZI system or an RLL coding method. Servo information in which the dummy code is interleaved is decoded after the dummy code is removed at the time of demodulation.

摘要翻译： 一种在扇区伺服系统的磁盘装置中形成伺服信息的方法。 伺服信息预先记录在每个扇区的开始处，并且包括DC擦除信号，轨道地址信号和突发信号。 轨道地址信号指示扇区所在的磁盘的哪个磁道，并且通过以格雷码表示轨道地址并将伪码交织到格雷码中而形成。 使用NRZI系统或RLL编码方法记录伺服信息。 在解调时，在伪码被去除之后，对其中交织了伪码的伺服信息进行解码。