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51.发明授权Optical recording and reproducing apparatus for verifying correct writing of information signal 失效用于验证信息信号的正确写入的光学记录和再现装置
公开(公告)号：US4935914A
公开(公告)日：1990-06-19
申请号：US209838
申请日：1988-06-22
CPC分类号： G11B20/1879 , G11B19/04 , G11B7/004 , G11B7/125
摘要： An optical recording and reproducing apparatus includes a controlling circuit for controlling a light intensity of a laser beam emitted by a laser diode. The controlling circuit sets the light intensity in a verifying mode at a level lower than those in data read and write modes. The verifying mode is a mode for verifying whether or not the recording or reproducing apparatus can operate correctly. The apparatus also comprises a verifying circuit for comparing the reproduced information signal obtained in the verifying mode with a reference information signal which corresponds to the information signal written into the optical disc.
摘要翻译： 光记录和重放装置包括一个控制电路，用于控制由激光二极管发射的激光束的光强度。 控制电路将验证模式中的光强设置为低于数据读和写模式的光强度。 验证模式是用于验证记录或再现设备是否能够正常工作的模式。 该装置还包括验证电路，用于将在验证模式中获得的再现信息信号与对应于写入光盘的信息信号的参考信息信号进行比较。
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52.发明授权
公开(公告)号：US4918743A
公开(公告)日：1990-04-17
申请号：US262958
申请日：1988-10-26
申请人： Hiroshi Tsuyuguchi
发明人： Hiroshi Tsuyuguchi
CPC分类号： G11B19/28 , G11B19/20 , Y10S388/908
摘要： A magnetic or optical disk apparatus featuring a circuit for generating a dual implication MOTOR STATUS signal in response to a MOTOR SPEED signal representative of the speed of rotation of a disk drive motor and to a MOTOR ON signal dictating the rotation and nonrotation of the disk drive motor. The MOTOR STATUS signal indicates: (1) the rotation of the disk drive motor at a desired normal speed, enabling data transfer between the disk and a head; and (2) the slowing down of the motor to a predetermined speed close to zero. The two implications of the MOTOR STATUS signal can be distinguished from each other by reference to the MOTOR ON signal. The first implication may be used to enable reading or writing of data on the disk, and the second implication for disk ejection and for opening a power switch or switches, among other purposes.
摘要翻译： 一种磁盘或光盘装置，其特征在于，用于响应于表示盘驱动电动机的转速的MOTOR SPEED信号和指示磁盘驱动器的旋转和非旋转的MOTOR ON信号产生双重含义MOTOR STATUS信号的电路 发动机。 电机状态信号表示：（1）磁盘驱动电机以所需的正常速度旋转，使数据在磁盘和磁头之间传输; 和（2）将电机减速到接近零的预定速度。 可以通过参考MOTOR ON信号将电机状态信号的两个含义相互区分开。 第一个含义可以用于使得能够在盘上读取或写入数据，以及用于盘排出和用于打开电源开关或开关的第二个含义以及其他目的。
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53.发明授权Power-saving read/write circuit for apparatus for digital data transfer with a magnetic disk 失效用于磁盘数字数据传输的设备的省电读/写电路
公开(公告)号：US4816934A
公开(公告)日：1989-03-28
申请号：US106145
申请日：1987-10-07
申请人： Hiroshi Tsuyuguchi
发明人： Hiroshi Tsuyuguchi
摘要： A magnetic disk drive of the type comprising at least one read/write head assembly having a read/write coil which is center-tapped to provide a pair of coil halves which are alternately excited during writing, and a write terminate resistor connected between the coil halves for preventing the flow of oscillatory current therethrough during writing. In order to electrically isolate the write terminate resistor from the read circuit also coupled to the opposite extremities of the read/write coil, alternating-current switches are connected between the write terminate resistor and the read/write coil so as to be away from the paths of write current through the coil. The alternating-current switches are rendered conductive only during writing.
摘要翻译： 一种磁盘驱动器，其类型包括至少一个具有读/写线圈的读/写头组件，读/写线圈被中心抽头以提供在写入期间交替激发的一对线圈半部，以及连接在线圈之间的写终端电阻器 在写入期间防止振荡电流流过的一半。 为了将写入终端电阻器与读/写线圈的相对端部耦合的读取电路电隔离，交流开关连接在写终端电阻器和读/写线圈之间，以便远离 通过线圈写入电流的路径。 交流开关仅在写入时才导通。
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54.发明授权Stepping motor drive system and method capable of stopping the rotor in a required angular position 失效步进电机驱动系统和方法能够使转子停止在所需的角度位置
公开(公告)号：US4697129A
公开(公告)日：1987-09-29
申请号：US829425
申请日：1986-02-13
CPC分类号： H02P8/32
摘要： In a stepping motor of the type having one or more sets of four phase windings on respective stator poles, with the four phase windings being excited sequentially to cause the rotation of a rotor having magnetic poles, a drive method and system are disclosed for stopping the rotor in exact angular positions required. Since the stator can less magnetically control the rotor when the latter is positioned with its magnetic poles in axact alignment with the stator poles, the stator windings are sequentially excited in such a manner that upon termination of the sequential excitation, the rotor comes to a stop in a position angularly displaced to a predetermined degree in a predetermined direction from a position of exact alignment with the stator poles. Basically, for stopping the rotor in such angular positions, at least two of the four phase windings are excited at a time with currents of predetermined different magnitudes.
摘要翻译： 在具有在相应的定子极上具有一组或多组四相绕组的类型的步进电动机中，四相绕组被依次激励以引起具有磁极的转子的旋转，公开了驱动方法和系统用于停止 转子需要精确的角位置。 由于定子可以在转子定位时使磁体与定子极轴线对齐而定位绕组顺序地被激励，因此当转子终止时，转子停止 在从与定子极精确对准的位置向预定角度位移到预定的方向的位置。 基本上，为了将转子停止在这样的角度位置，四个相绕组中的至少两个被一次以预定的不同幅度的电流激发。
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55.发明授权Power saving circuit arrangement for data transfer apparatus with a disklike record medium 失效具有盘状记录介质的数据传输装置的节电电路装置
公开(公告)号：US4691255A
公开(公告)日：1987-09-01
申请号：US699084
申请日：1985-02-07
申请人： Yoshiaki Sakai , Hiroshi Tsuyuguchi
发明人： Yoshiaki Sakai , Hiroshi Tsuyuguchi
CPC分类号： G11B19/20
摘要： A magnetic disk drive is disclosed which has a disk drive motor for imparting rotation to a magnetic disk, and a head transport motor for transporting a transducer head or heads radially of the magnetic disk for track to track accessing. The disk drive motor and the head transport motor are fed from a common direct current supply terminal via first and second switching transistors, respectively, which independently control power delivery to the two motors for effectively saving power. A voltage regulating capacitor is connected only between ground and the output line of the first switching transistor for the disk drive motor. In order to prevent the flow of a surge current due to the voltage regulating capacitor upon conduction of the first switching transistor, a conduction retarder is provided which causes a gradual conduction through the first switching transistor in response to an actuating signal from host equipment controlling the disk drive. The conduction retarder takes the form of a capacitor connected between the collector and base of the first switching transistor in one embodiment of the invention, and of a time constant circuit connected between the host equipment and the base of the first switching transistor in another embodiment.
摘要翻译： 公开了一种磁盘驱动器，其具有用于向磁盘提供旋转的磁盘驱动电机，以及用于传送磁头的磁头或磁头径向磁道的磁头传送电机，用于磁道跟踪访问。 磁盘驱动电动机和磁头传送电动机分别经由第一和第二开关晶体管从公共直流电源端子馈送，其独立地控制向两个电动机的电力输送以有效地节省电力。 电压调节电容器仅连接在第一个用于盘驱动电动机的开关晶体管的地与输出线之间。 为了防止在第一开关晶体管导通时由于电压调节电容器引起的浪涌电流的流动，提供了导电延迟器，其导致通过第一开关晶体管的逐渐导通，响应于来自主机设备的致动信号控制 磁盘驱动器。 在本发明的一个实施例中，导电延迟器采用连接在第一开关晶体管的集电极和基极之间的电容器的形式，以及在另一实施例中连接在主机设备和第一开关晶体管的基极之间的时间常数电路。
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公开(公告)号：US4675763A
公开(公告)日：1987-06-23
申请号：US694872
申请日：1985-01-25
CPC分类号： G11B17/32 , G11B19/2009
摘要： An apparatus for data transfer with a magnetic disk having a diameter of, say, 86 millimeters, having a pair of transducer heads for data transfer engagement with the opposite surfaces of the disk mounted on a turntable driven directly by a disk drive motor. In order to hold the magnetic disk exactly level on the turntable for proper data transfer contact with the transducer heads, a leveling mechanism is provided whereby at least the turntable is made adjustably movable in its axial direction with respect to the frame of the apparatus, as by the manual turn of an adjusting screw or screws. In one embodiment, the turntable is movable with a drive spindle on which it is mounted coaxially and which forms an output shaft of the disk drive motor. In another embodiment, the turntable travels with the complete disk drive motor.
摘要翻译： 具有直径为86毫米的磁盘进行数据传输的装置具有一对换能器头，用于与安装在由盘驱动马达直接驱动的转台上的盘的相对表面进行数据传送接合。 为了将磁盘牢固地保持在转盘上，与传感器头正确地进行数据传送接触，提供了一个调平机构，由此至少使转台相对于设备的框架在其轴向上可调节地移动，如 通过手动转动调节螺丝或螺丝。 在一个实施例中，转盘可与驱动主轴一起移动，驱动主轴同轴地安装在该驱动主轴上并形成盘驱动马达的输出轴。 在另一个实施例中，转盘与完整的盘驱动马达一起行进。
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