公开(公告)号：US5345343A

公开(公告)日：1994-09-06

申请号：US049562

申请日：1993-04-19

申请人： Tohru Miura ,  Hiroshi Tsuyuguchi

发明人： Tohru Miura ,  Hiroshi Tsuyuguchi

IPC分类号： G11B19/00 ,  G11B19/04 ,  G11B19/12 ,  G11B15/04 ,  G11B15/18

CPC分类号： G11B19/00 ,  G11B19/04

摘要： A flexible magnetic disk drive is disclosed which operates under the control of a host system. A CMOS inverter is employed as a power saving switch, holding a file protect sensor energized only when the standard "drive select" signal from the host commands operation of the disk drive. Another CMOS inverter is provided for two disk capacity a sensors which provide signals indicative of the data storage capacity of the loaded disk cartridge. The disk capacity sensors are energized only when the drive select signal commands operation of the disk drive and when the standard "motor on" signal dictates rotation of a disk drive motor.

摘要翻译： 公开了在主机系统的控制下操作的柔性磁盘驱动器。 CMOS逆变器被用作省电开关，只有当主机指定磁盘驱动器的操作的标准“驱动器选择”信号时，才保持文件保护传感器通电。 为两个磁盘容量提供另一个CMOS反相器，传感器提供指示所装载的磁盘盒的数据存储容量的信号。 磁盘容量传感器只有当驱动器选择信号指示磁盘驱动器的操作并且当标准的“电机接通”信号指示磁盘驱动电机的旋转时才被激励。

公开(公告)号：US5293601A

公开(公告)日：1994-03-08

申请号：US633665

申请日：1990-12-26

申请人： Hiroshi Tsuyuguchi ,  Shinichiro Tanaka ,  Fumio Nagase ,  Naoki Sugeta ,  Miya Enami ,  Tohru Miura ,  Katsuya Enami

发明人： Hiroshi Tsuyuguchi ,  Shinichiro Tanaka ,  Fumio Nagase ,  Naoki Sugeta ,  Miya Enami ,  Tohru Miura ,  Katsuya Enami

IPC分类号： G06F3/06 ,  G11B19/02 ,  G06F13/00

CPC分类号： G06F3/0601 ,  G11B19/02 ,  G06F2003/0692

摘要： A floppy disk drive controller has a control part which performs a plurality of kinds of controls by means of outputting control information appropriate to each kind of control, and a memory part in which information which selects a predetermined kind of control from among the plurality of kinds of controls is pre-stored, the control part outputting the control information corresponding to the predetermined kind of control which is selected based on the information from the memory part.

摘要翻译： 软盘驱动器控制器具有通过输出适合于各种控制的控制信息来执行多种控制的控制部分，以及从多种类型中选择预定种类的控制的信息的存储器部分 控制部分预先存储，控制部分输出与基于来自存储器部分的信息所选择的预定种类的控制相对应的控制信息。

公开(公告)号：US5150340A

公开(公告)日：1992-09-22

申请号：US618656

申请日：1990-11-27

申请人： Tohru Miura ,  Miya Umeda ,  Katsuya Enami

发明人： Tohru Miura ,  Miya Umeda ,  Katsuya Enami

IPC分类号： G11B17/028 ,  G11B19/02 ,  G11B19/06 ,  G11B19/20

CPC分类号： G11B19/20 ,  G11B19/02 ,  G11B19/06

摘要： A disc apparatus includes a drive mechanism rotatively driving a disc recording medium and having a motor and a chucking mechanism provided on a shaft of the motor, a head reading out information from the disc recording medium, a disc loading detector for outputting a loading detection signal when the disc recording medium has been loaded into the disc apparatus, a chucking control circuit outputting a motor rotation control signal for driving the motor during a chucking operation by the chucking mechanism, a motor drive control circuit driving the motor when at least one of a motor rotation control signal from the chucking control circuit and from an external information processing apparatus controlling the disc apparatus are supplied, an information output circuit supplying information obtained from the head to the external information processing apparatus during the motor is rotated on basis of the motor rotation signal, and an output prohibit circuit prohibiting the supply of information from the information output circuit to the external information processing apparatus while the motor rotation control is being output from the chucking control circuit.

摘要翻译： 盘装置包括驱动机构，其旋转地驱动盘记录介质，并且具有设置在马达的轴上的马达和夹紧机构，从盘记录介质读出信息的头，用于输出加载检测信号的盘装载检测器 当盘记录介质已经装载到盘装置中时，一个卡盘控制电路输出马达转动控制信号，用于在通过夹紧机构进行的夹紧操作期间驱动马达;马达驱动控制电路，当马达驱动控制信号中的至少一个 提供来自夹持控制电路和控制盘装置的外部信息处理装置的电动机旋转控制信号，根据电机旋转来旋转从头部向外部信息处理装置提供信息的信息输出电路 信号和禁止输入信号的输出禁止电路 同时从卡盘控制电路输出马达旋转控制，从信息输出电路到外部信息处理装置。

公开(公告)号：US5602812A

公开(公告)日：1997-02-11

申请号：US554736

申请日：1995-11-07

申请人： Tohru Miura ,  Mitsumasa Kubo ,  Akira Mashimo

发明人： Tohru Miura ,  Mitsumasa Kubo ,  Akira Mashimo

IPC分类号： G11B20/14 ,  G11B7/0037 ,  G11B7/005 ,  G11B19/28 ,  G11B20/10 ,  G11B20/18 ,  G11B27/00 ,  G11B5/09

CPC分类号： G11B19/28 ,  G11B20/10 ,  G11B20/18 ,  G11B27/005 ,  G11B7/0037 ,  G11B7/005

摘要： A reproducing rate control apparatus for an optical disk includes a synchronizing clock generating unit which generates a synchronizing clock pulse with a phase locked to a phase of a digital reproduction signal. A signal processing unit generates a demodulated data signal from the digital reproduction signal in accordance with the synchronizing clock pulse, wherein the demodulated data signal is written to a memory in accordance with the synchronizing clock pulse, the demodulated data signal is read from the memory in accordance with a read reference clock pulse, and the read demodulated data signal is processed through an error correction so that a processed demodulated data signal is output. A frequency detecting unit detects whether the frequency of the synchronizing clock pulse is within a predetermined range of frequencies centered at a standard frequency. A switching unit selectively outputs one of a first read-reference clock pulse having an initial frequency and a second read-reference clock pulse having a second frequency to the signal processing unit in accordance with a result of the detection by the frequency detecting unit.

摘要翻译： 一种用于光盘的再现速率控制装置包括同步时钟产生单元，其产生锁相到数字再现信号的相位的同步时钟脉冲。 信号处理单元根据同步时钟脉冲从数字再现信号生成解调数据信号，其中根据同步时钟脉冲将解调数据信号写入存储器，从存储器中读取解调数据信号 根据读取的参考时钟脉冲，并且通过纠错来处理读取的解调数据信号，从而输出经处理的解调数据信号。 频率检测单元检测同步时钟脉冲的频率是否在以标准频率为中心的预定频率范围内。 开关单元根据频率检测单元的检测结果，将具有初始频率的第一读取参考时钟脉冲和具有第二频率的第二读取参考时钟脉冲中的一个选择性地输出到信号处理单元。

公开(公告)号：US5434724A

公开(公告)日：1995-07-18

申请号：US201774

申请日：1994-02-25

申请人： Makoto Shoji ,  Tohru Miura ,  Hiroshi Tsuyuguchi

发明人： Makoto Shoji ,  Tohru Miura ,  Hiroshi Tsuyuguchi

IPC分类号： G11B21/08 ,  G11B19/00 ,  G11B19/02

CPC分类号： G11B19/00

摘要： A microcomputer system having a flexible magnetic disk drive and a controller therefor, with the disk drive including a stepper motor for incrementally moving a transducer from track to track on a rotating magnetic disk, and a clock which is inherently unstable in operation during a predefinable startup period thereof after being powered on. In order to enable the disk drive to internally generate stepping pulses for driving the stepper motor at twice as high a rate as by external stepping pulses from the controller without being affected by unstable clock pulses during the startup period of the clock, the controller supplies external stepping pulses to the disk drive after imparting a predetermined delay, longer than the startup period of the clock, to each series of external stepping pulses with respect to the moment a power save signal, also supplied from the controller to the disk drive, indicates that the clock and other power consuming parts of the disk drive be powered. Within the disk drive a counter counts the clock pulses for a length of time equal to half the period of each series of external stepping pulses in response to each incoming external stepping pulse, thereby providing output pulses that rise with the respective external stepping pulses. A pulse generator circuit generates internal stepping pulses in synchronism with both leading and trailing edges of the counter output pulses. Additional embodiments are disclosed.

摘要翻译： 一种具有柔性磁盘驱动器及其控制器的微计算机系统，其中磁盘驱动器包括步进马达，该步进马达用于在旋转磁盘上逐渐地将传感器从轨道移动到轨道，以及在预定义启动期间操作中固有地不稳定的时钟 上电后的周期。 为了使磁盘驱动器内部产生用于驱动步进电机的步进脉冲，其速度是来自控制器的外部步进脉冲的两倍，而不受时钟启动期间不稳定的时钟脉冲的影响，控制器提供外部 相对于从控制器向磁盘驱动器提供的功率保存信号的时刻，向每个系列的外部步进脉冲施加比时钟的启动时间长的预定延迟，向盘驱动器提供步进脉冲， 磁盘驱动器的时钟和其他耗电部分被供电。 在磁盘驱动器内，计数器响应于每个进入的外部步进脉冲，对时钟脉冲计数等于每一系列外部步进脉冲的周期的一半的时间长度，从而提供随着各个外部步进脉冲而上升的输出脉冲。 脉冲发生器电路与计数器输出脉冲的前沿和后沿同步产生内部步进脉冲。 公开了另外的实施例。