公开(公告)号：US5521895A

公开(公告)日：1996-05-28

申请号：US504933

申请日：1995-07-20

申请人： Tohru Miura ,  Mitsumasa Kubo ,  Akira Mashimo

发明人： Tohru Miura ,  Mitsumasa Kubo ,  Akira Mashimo

IPC分类号： G11B7/0037 ,  G11B19/24 ,  G11B19/28 ,  G11B20/10 ,  G11B20/12 ,  G11B20/14 ,  G11B7/00

CPC分类号： G11B20/1403 ,  G11B19/24 ,  G11B20/10009 ,  G11B20/1258 ,  G11B7/0037

摘要： An optical disk reproducing apparatus uses a spindle motor having a low torque to reduced power consumption and manufacturing cost while maintaining a low error rate for reproduced data. The spindle motor is rotated at a constant rotational speed under a CAV control when a pick-up is moved. The rotational speed of the spindle motor is switched to a reference linear speed under a CLV control when a reproducing operation is performed. The reference linear speed is established for each of the zones of a recording area of an optical disk. The reference linear speed is determined by generating a zone clock set for each of the zones. A frequency error signal is generated by comparing the zone clock with the reproduction data so as to maintain the spindle motor at the reference linear speed determined by the zone clock.

摘要翻译： 光盘再现装置使用具有低转矩的主轴电机来降低功耗和制造成本，同时保持低重现数据的错误率。 当移动拾取器时，主轴电机在CAV控制下以恒定的转速旋转。 当执行再现操作时，主轴电机的转速在CLV控制下切换到参考线速度。 为光盘的记录区域的每个区域建立参考线速度。 参考线速度通过为每个区域生成一个区时钟来确定。 通过将区域时钟与再现数据进行比较来产生频率误差信号，以将主轴电动机保持在由区域时钟确定的参考线速度。

公开(公告)号：US5015974A

公开(公告)日：1991-05-14

申请号：US366516

申请日：1989-06-15

申请人： Tomokazu Komazaki ,  Katsuhiko Gunji ,  Norio Onishi ,  Akira Mashimo

发明人： Tomokazu Komazaki ,  Katsuhiko Gunji ,  Norio Onishi ,  Akira Mashimo

IPC分类号： H01P1/205 ,  H01P1/213

CPC分类号： H01P1/2136 ,  H01P1/2056

摘要： An isolating circuit, which isolates a first frequency signal in a first frequency range and a second frequency signal in a second frequency range which is higher than the first frequency range, has as antenna terminal, a first filter and a second filter. The first filter, having a first input terminal and a first output terminal, receives a first input signal including the first frequency signal at the first input terminal and attenuates first frequency component of the first input signal below the first frequency range at a first attenuation rate and second frequency components of the first input signal above the first frequency range at a second attenuation rate. One of the first input and output terminals of the first filter is coupled to the antenna terminal. The first filter further has a first setting terminal setting the first attenuation rate and the second attenuation rate so that the second attenuation rate is greater than the first attenuation rate. The second filter, having second input and output terminals, receives a second input signal including the second frequency signal at the second input terminal and attenuataes third frequency components of the second input signal below the second frequency range at a third attenuation rate and fourth frequency components of the second input signal above the second frequency range at a fourth attenuation rate. One of the second input and output terminals of the second filter is coupled to the antenna terminal. The second filter further has a second setting terminal setting the third attenuation rate and fourth attenuation rate so that the third attenuation rate is greater than the fourth attenuation rate.

公开(公告)号：US4891615A

公开(公告)日：1990-01-02

申请号：US285527

申请日：1988-12-16

申请人： Tomokazu Komazaki ,  Katsuhiko Gunji ,  Norio Onishi ,  Yoshimitu Sakurai ,  Hiroyuki Horii ,  Akira Mashimo

发明人： Tomokazu Komazaki ,  Katsuhiko Gunji ,  Norio Onishi ,  Yoshimitu Sakurai ,  Hiroyuki Horii ,  Akira Mashimo

IPC分类号： H01P1/205 ,  H01P7/04

CPC分类号： H01P1/2056

摘要： A dielectric filter with an attenuation pole having sharp attenuation characteristics. The dielectric block employed in the present dielectric includes a dielectric block single-block formed of TiO.sub.2 or BaO, for example. The dielectric block of this type has a plurality of resonators extending from a top surface toward a bottom surface thereof, a plurality of adjusting patterns provided over the top surface thereof, an outer conductor formed by side surfaces and the bottom surface thereof, input and output electrodes, wherein the adjusting patterns, the outer conductor, input and output electrodes maybe plated, for example, by silver, and an insulated cable which may have one end connected to the outer conductor and another end connected to the output electrode is disposed over the plurality of resonators so as to be coupled thereto.

摘要翻译： 具有衰减极的介质滤波器具有明显的衰减特性。 在本电介质中使用的介质块包括例如由TiO 2或BaO形成的介电块单块。 这种类型的介质块具有从顶表面向其底表面延伸的多个谐振器，在其顶表面上设置的多个调节图案，由侧表面及其底表面形成的外导体，输入和输出 电极，其中调节图案，外导体，输入和输出电极可以例如由银电镀，并且可以具有连接到外导体的一端和连接到输出电极的另一端的绝缘电缆设置在 多个谐振器以便耦合到其上。

公开(公告)号：US4841504A

公开(公告)日：1989-06-20

申请号：US73979

申请日：1987-07-14

申请人： Hirohisa Yamaguchi ,  Akira Mashimo

发明人： Hirohisa Yamaguchi ,  Akira Mashimo

IPC分类号： G11B20/02 ,  G11B19/02 ,  G11B27/026 ,  G11B27/10 ,  G11B27/22 ,  G11B27/32 ,  G11B27/36

CPC分类号： G11B19/02 ,  G11B27/026 ,  G11B27/22 ,  G11B27/322 ,  G11B27/36 ,  G11B2220/20

摘要： A method and apparatus for assembling an information signal on a rotary recording medium comprising a pre-recorded track recorded with pre-recorded information signals and an unrecorded track not recorded with information signals by use of a light beam in which an information signal to be newly recorded on the rotary recording medium is recorded continuously from the pre-recorded information signal already recorded on the pre-recorded track. The apparatus by use of a light beam searches for a pre-recorded track turn which is a portion of the pre-recorded track immediately preceding the unrecorded track and continuously reproduces the information signal from the searched pre-recorded track turn as it waits for a command signal commanding the recording of the information signal to be recorded. Responsive to the command signal, the apparatus terminates the repetition of the reproducing operation of the searched track turn and commences the recording on the unrecorded track turn following the searched pre-recorded track turn.

摘要翻译： 一种用于在旋转记录介质上组装信息信号的方法和装置，包括利用其中新信息信号的光束记录有预先记录的信息信号的预记录磁道和未被记录有信息信号的未记录磁道 从已经记录在预先记录的轨道上的预先记录的信息信号连续地记录在旋转记录介质上。 通过使用光束的装置搜索预先记录的轨道转弯，其是紧接在未记录轨道之前的预先记录的轨道的一部分，并且在等待的情况下从所搜索的预先记录的轨道转弯中连续再现信息信号 指令要记录的信息信号的记录。 响应于命令信号，设备终止重复所搜索的轨道转弯的再现操作，并且在搜索到的预先记录的轨道转弯之后开始在未记录的轨道上的记录。

公开(公告)号：US4803677A

公开(公告)日：1989-02-07

申请号：US873407

申请日：1986-06-12

申请人： Hirohisa Yamaguchi ,  Horoshi Usami ,  Tadao Nagai ,  Akira Mashimo

发明人： Hirohisa Yamaguchi ,  Horoshi Usami ,  Tadao Nagai ,  Akira Mashimo

IPC分类号： G11B7/09 ,  G11B7/007 ,  G11B7/095

CPC分类号： G11B7/0909 ,  G11B7/0903 ,  G11B7/0938

摘要： A disc comprises a recording surface which is divided into a plurality of equiangular sectoral regions and a guide track formed on the recording surface. Each track turn of the guide track is constituted by a row of pits formed in every other equiangular sectoral regions, and the pit is only formed in one of two mutually adjacent track turns of the guide track in each equiangular sectoral region so that the pits are formed in every other track turns in a radial direction of the disc in each equiangular sectoral region. An apparatus for playing the disc comprises a circuit for producing a switching pulse signal having a period dependent on a period of the pits of the guide track based on signals which are reproduced from the two mutually adjacent track turns by sub light beams, a circuit for alternately inverting a polarity of signals which are reproduced from the two mutually adjacent track turns by a main light beam for every one half period of the switching pulse signal and for generating a tracking error signal, a tracking device, and a device for recording and reproducing an information signal on and from an intermediate part of the disc between the two mutually adjacent track turns.

摘要翻译： 盘包括记录表面，该记录表面被分成多个等角扇形区域和形成在记录表面上的导轨。 导轨的每个轨道转弯由形成在每个其他等角部分区域中的一排凹坑构成，并且凹坑仅形成在每个等角扇形区域中的导轨的两个相互相邻的轨道匝之一中，使得凹坑 在每个其他轨道中形成的每个等角部分区域中的圆盘的径向方向。 用于播放光盘的装置包括：电路，用于产生具有取决于导轨的凹坑的周期的周期的切换脉冲信号，所述周期基于通过副光束从两个相互相邻的轨道匝再现的信号， 在切换脉冲信号的每半个周期，通过主光束交替地反转从两个相互相邻的轨道匝再现的信号的极性，并产生跟踪误差信号，跟踪装置和用于记录和再现的装置 在两个相互相邻的轨道匝之间的来自盘的中间部分的信息信号。

公开(公告)号：US4754339A

公开(公告)日：1988-06-28

申请号：US929605

申请日：1986-11-10

申请人： Tadao Nagai ,  Hirohisa Yamaguchi ,  Akira Mashimo

发明人： Tadao Nagai ,  Hirohisa Yamaguchi ,  Akira Mashimo

IPC分类号： G11B20/12 ,  G11B7/09 ,  G11B27/19 ,  G11B27/24 ,  G11B27/32 ,  H04N9/82 ,  H04N9/83 ,  H04N9/79 ,  G11B7/013 ,  H04N5/85

CPC分类号： H04N9/8205 ,  G11B27/19 ,  G11B27/24 ,  G11B27/322 ,  G11B7/0938 ,  H04N9/8222 ,  H04N9/83 ,  G11B2220/20

摘要： An information recording disc comprises a guide track, an address signal recording portion arranged in each track turn of the guide track and pre-recorded with an address signal, and a pseudo address signal recording portion arranged in each track turn of the guide track adjacent a corresponding address signal recording portion provided in a track turn of the guide track adjacent thereto. The recording length of the pseudo address signal recording portion is selected approximately equal to the recording length of the corresponding address signal recording portion.

摘要翻译： 信息记录盘包括导轨，布置在导轨的每个轨道转弯中并预先记录有地址信号的地址信号记录部分，以及布置在导轨的每个轨道转弯中的伪地址信号记录部分， 相应的地址信号记录部分设置在与其相邻的导轨的轨道转弯中。 选择伪地址信号记录部分的记录长度大约等于相应地址信号记录部分的记录长度。