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1.发明授权
公开(公告)号：US5657176A
公开(公告)日：1997-08-12
申请号：US471460
申请日：1995-06-06
CPC分类号： G11B20/10009 , G11B20/1258 , G11B27/36 , G11B5/012 , G11B5/02 , G11B5/09 , G11B20/1833 , G11B2005/0013
摘要： Increased memory capacity for a magnetic disk device is realized without degrading information error rate, by making the number of sectors at a given circumference of the disk variable in accordance with a radial direction of a disk. The number of sectors is made variable by deciding a predetermined information error rate from a ratio of reproduced signal output to noises of head, disk and amplifier at a maximum recording and reproducing frequency at a certain radial position along a disk.
摘要翻译： 通过使磁盘的给定周长处的扇区数根据磁盘的径向方向变化，实现磁盘装置的增加的存储器容量而不降低信息错误率。 通过从沿着盘的特定径向位置处的最大记录和再现频率的重放信号输出到磁头，磁盘和放大器的噪声的比率确定预定的信息错误率，使扇区数变化。
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2.发明授权
公开(公告)号：US5430581A
公开(公告)日：1995-07-04
申请号：US996383
申请日：1992-12-23
CPC分类号： G11B20/10009 , G11B20/1258 , G11B27/36 , G11B5/012 , G11B5/02 , G11B5/09 , G11B20/1833 , G11B2005/0013
摘要： Increased memory capacity for a magnetic disk device is realized without degrading information error rate, by making the number of sectors at a given circumference of the disk variable in accordance with a radial direction of a disk. The number of sectors is made variable by deciding a predetermined information error rate from a ratio of reproduced signal output to noises of head, disk and amplifier at a maximum recording and reproducing frequency at a certain radial position along a disk.
摘要翻译： 通过使磁盘的给定周长处的扇区数根据磁盘的径向方向变化，实现磁盘装置的增加的存储器容量而不降低信息错误率。 通过从沿着盘的特定径向位置处的最大记录和再现频率的重放信号输出到磁头，磁盘和放大器的噪声的比率确定预定的信息错误率，使扇区数可变。
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公开(公告)号：US5337198A
公开(公告)日：1994-08-09
申请号：US909997
申请日：1992-07-07
申请人： Nobumasa Nishiyama , Toshiaki Tsuyoshi , Hajime Aoi , Tetsuji Kameoka , Masaya Tanaka , Kazuhisa Shiraishi
发明人： Nobumasa Nishiyama , Toshiaki Tsuyoshi , Hajime Aoi , Tetsuji Kameoka , Masaya Tanaka , Kazuhisa Shiraishi
CPC分类号： G11B5/09 , G11B20/10046
摘要： A waveform equalizer for processing a signal read by a magnetic head from a magnetic written medium includes a slimming circuit which, in turn, has a first delay unit for delaying the read signal, a first attenuator connected in parallel with the first delay unit, a first differentiating circuit for receiving the output from the first delay unit and the output from the first attenuator, and a resistor connected to a first delay unit side input of the first differential circuit; and a pseudo-peak elimination circuit connected in series with the slimming circuit and including a circuit for separating the from the read signal the read signal or a signal reverse in phase to the read signal, a second delay unit for delaying the separated signal, a second attenuator for attenuating the amplitude of the separated signal, and a second differential circuit for receiving the read signal and the separated, delayed and attenuated signal.
摘要翻译： 用于处理由磁性写入介质由磁头读取的信号的波形均衡器包括减弱电路，该减幅电路又具有用于延迟读取信号的第一延迟单元，与第一延迟单元并联连接的第一衰减器， 用于接收来自第一延迟单元的输出和来自第一衰减器的输出的第一微分电路，以及连接到第一差分电路的第一延迟单元侧输入的电阻器; 以及与所述减肥电路串联连接的伪峰值消除电路，并且包括用于将读取信号或相反相反的信号与读取信号分离的读取信号的电路，用于延迟分离的信号的第二延迟单元， 第二衰减器，用于衰减分离信号的振幅;以及第二差分电路，用于接收读取信号和分离的，延迟和衰减的信号。
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公开(公告)号：US5953178A
公开(公告)日：1999-09-14
申请号：US977942
申请日：1997-11-24
申请人： Akio Takatsuka , Hideaki Amano , Katsuhiro Tsuneta , Toshiaki Tsuyoshi , Tetsuji Kameoka , Haruhiko Hosokawa , Takashi Yamaguchi , Kazuyoshi Hanada , Satoru Yamaura , Toshio Matsushita , Toshihisa Okazaki
发明人： Akio Takatsuka , Hideaki Amano , Katsuhiro Tsuneta , Toshiaki Tsuyoshi , Tetsuji Kameoka , Haruhiko Hosokawa , Takashi Yamaguchi , Kazuyoshi Hanada , Satoru Yamaura , Toshio Matsushita , Toshihisa Okazaki
CPC分类号： G11B5/5526 , G11B19/02 , G11B27/3027 , G11B5/012 , G11B5/4886 , G11B5/59655 , G11B5/59683 , G11B2220/20 , G11B5/39
摘要： A magnetic disk apparatus includes a dual head equipped with an MR head for reading data and an inductive head for writing the data. One ID portion and one servo pattern are disposed in one sector and an unequal track pitch is formed. The ID portion is formed at the center of a radius of two positions to which the MR head is positioned at the time of reading the data and writing the data, respectively.
摘要翻译： 磁盘装置包括配有用于读取数据的MR磁头和用于写入数据的感应头的双头。 一个ID部分和一个伺服图案设置在一个扇区中，并且形成不等轨道间距。 在读取数据并写入数据时，ID部分形成在MR头位于两个位置的半径的中心处。
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5.发明授权
公开(公告)号：US5726955A
公开(公告)日：1998-03-10
申请号：US744760
申请日：1996-11-06
申请人： Seiji Yonezawa , Norio Ohta , Toshio Niihara , Keiji Kataoka , Masahiko Takahashi , Harukazu Miyamoto , Hirofumi Sukeda , Toshiaki Tsuyoshi
发明人： Seiji Yonezawa , Norio Ohta , Toshio Niihara , Keiji Kataoka , Masahiko Takahashi , Harukazu Miyamoto , Hirofumi Sukeda , Toshiaki Tsuyoshi
IPC分类号： G11B20/10 , G11B5/02 , G11B7/006 , G11B7/007 , G11B11/10 , G11B11/105 , G11B27/19 , G11B27/30 , G11B11/00
CPC分类号： G11B7/00745 , G11B11/10513 , G11B11/10521 , G11B11/10528 , G11B11/1053 , G11B11/10595 , G11B27/19 , G11B27/3027 , G11B7/006
摘要： A magneto-optical data recording system comprises magnetic field pulse applying means for applying to a magneto-optic recording medium a magnetic field pulse of a polarity corresponding to code data to be recorded, and means for heating the recording medium in a pulsating manner at a predetermined frequency synchronous with the code data to be recorded. During recording, the magnetic field pulse applying means applies a magnetic field pulse of a polarity corresponding to code data along a track of the recording medium and the heating means continuously heats the recording medium in a pulsating manner at a predetermined frequency synchronous with the code data to thereby directly overwrite the code data. The magnetic field pulse applying means includes a magnetic coil driven by code data from a source of code data (data generator). The heating means includes an optical head which comprises a source of laser beam driven by a laser driver and an optical system which focuses the laser beam from the source of laser beam as a small light spot onto the recording medium.
摘要翻译： 一种磁光数据记录系统，包括磁场脉冲施加装置，用于向磁光记录介质施加与要记录的代码数据相对应的极性的磁场脉冲，以及用于以脉动方式加热记录介质的装置， 与要记录的代码数据同步的预定频率。 在记录期间，磁场脉冲施加装置沿着记录介质的轨道施加与代码数据对应的极性的磁场脉冲，并且加热装置以与代码数据同步的预定频率的脉动方式连续地加热记录介质 从而直接覆盖代码数据。 磁场脉冲施加装置包括由代码数据源（数据发生器）的代码数据驱动的磁线圈。 加热装置包括光学头，其包括由激光驱动器驱动的激光束源和将来自激光源的激光束作为小光点聚焦到记录介质上的光学系统。
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6.发明授权Method and associated apparatus and medium for optical recording and reproducing information 失效用于光学记录和再现信息的方法和相关设备和介质
公开(公告)号：US4949325A
公开(公告)日：1990-08-14
申请号：US169597
申请日：1988-03-17
申请人： Toshiaki Tsuyoshi , Masatoshi Ohtake , Wasao Takasugi , Seiji Yonezawa , Takashi Takeuchi , Tadashi Saitoh
发明人： Toshiaki Tsuyoshi , Masatoshi Ohtake , Wasao Takasugi , Seiji Yonezawa , Takashi Takeuchi , Tadashi Saitoh
CPC分类号： G11B27/3027 , G11B20/10009 , G11B20/10222 , G11B20/1217 , G11B20/1403 , G11B27/24 , G11B2220/218 , G11B2220/2545
摘要： In a method of recording/reproducing information associated with an apparatus and recording medium, the medium has an alternate formation including tracks of first regions wherein at least an optical record of preformatted pits at a constant time interval is recorded and second regions in which information is recorded so that optical retrieval can be achieved. A clock signal is generated based on the readout signal of the preformatted pits to record an information signal in the second regions, and the clock signal is retarded and used to read out data pits that are the record of the information in the second regions.
摘要翻译： 在记录/再现与装置和记录介质相关的信息的方法中，介质具有包括第一区域的轨道的交替地层，其中记录了以恒定时间间隔的至少预先格式化的凹坑的光学记录，其中信息是 记录，使得可以实现光学检索。 基于预格式化凹坑的读出信号产生时钟信号，以在第二区域中记录信息信号，并且时钟信号被延迟并用于读出作为第二区域中的信息记录的数据凹坑。
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公开(公告)号：US4872152A
公开(公告)日：1989-10-03
申请号：US131643
申请日：1987-12-11
CPC分类号： G11B7/0906
摘要： In a light spot position control system and method in which a control of the irradiation position of a light spot such as a focusing control, a jitter correction and/or a tracking control is made through a sampling control, a newly sampled error value is compared with a one-preceding sampled value. When a difference between both the values is within a range of a predetermined width, the newly sampled value is used as a new sample value as it is. When the difference exceeds the range of the predetermined width, a sum of the one-preceding sampled value and the predetermined width is used as a new sample value. Thereby, the influence of erroneous samples is reduced.
摘要翻译： 在通过采样控制进行聚焦控制，抖动校正和/或跟踪控制等光点的照射位置的控制的光点位置控制系统和方法中，对新采样的误差值进行比较 具有一个先前的采样值。 当两个值之间的差在预定宽度的范围内时，新采样的值被原样用作新的采样值。 当差超过预定宽度的范围时，将一次取样值与预定宽度的和用作新的样本值。 从而减少错误样品的影响。
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8.发明授权Magnetic recording drive having arrangements for average useful life of magnetorestive effects sensors 失效磁记录驱动器具有磁悬浮效应传感器的平均使用寿命的布置
公开(公告)号：US5572379A
公开(公告)日：1996-11-05
申请号：US305193
申请日：1994-09-13
申请人： Hajime Aoi , Toshiaki Tsuyoshi , Makoto Koizumi , Nobumasa Nishiyama , Yoshibumi Matsuda , Takuji Ogawa , Kazuhisa Shiraishi
发明人： Hajime Aoi , Toshiaki Tsuyoshi , Makoto Koizumi , Nobumasa Nishiyama , Yoshibumi Matsuda , Takuji Ogawa , Kazuhisa Shiraishi
IPC分类号： G11B5/02 , G11B5/00 , G11B5/012 , G11B5/09 , G11B5/39 , G11B5/40 , G11B5/55 , G11B5/596 , G11B19/02 , G11B19/04 , G11B27/30 , G11B27/36 , G11B5/03 , G11B5/127 , G11B5/33
CPC分类号： G11B19/04 , G11B19/02 , G11B27/3027 , G11B27/36 , G11B5/00 , G11B5/012 , G11B5/40 , G11B5/5547 , G11B2005/0016 , G11B2005/0018 , G11B5/59683
摘要： In a magnetic recording drive having a plurality of magnetic heads each employing a magnetoresistive sensor for the purpose of averaging the time required for sense currents to be caused to flow through the respective magnetoresistive sensors to shorten the longest reproducing time and to suppress the degradation of the characteristics due to the electromigration, thereby improving the reliability of the magnetic recording drive, the magnetic recording drive includes circuits for averaging the useful life depending on the currents caused to flow through the respective magnetoresistive sensors among the plurality of magnetic heads, whereby the time required for the sense current to be caused to flow through one MR reproducing head is greatly shortened. Therefore, the levels of outputs of the MR reproducing heads can be increased without reduction of the reliability and thus the reliability of the magnetic recording drive can be improved.
摘要翻译： 在具有多个磁头的磁记录驱动器中，每个磁头采用磁阻传感器，用于平均要使感应电流流过各磁阻传感器所需的时间，以缩短最长再现时间并抑制 由于电迁移的特性，从而提高了磁记录驱动器的可靠性，磁记录驱动器包括用于根据流过多个磁头中的相应磁阻传感器的电流来平均使用寿命的电路，由此所需的时间 使得通过一个MR再现头流动的感测电流大大缩短。 因此，可以在不降低可靠性的情况下增加MR再现头的输出电平，从而可以提高磁记录驱动器的可靠性。
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9.发明授权Method of recording and reproduction of information using a recording medium available for information overlap recording, a recording medium and a recording and reproducing apparatus using the method 失效使用可用于信息重叠记录的记录介质，记录介质和使用该方法的记录和再现装置来记录和再现信息的方法
公开(公告)号：US5218599A
公开(公告)日：1993-06-08
申请号：US412474
申请日：1989-09-26
IPC分类号： G11B11/10 , G11B7/00 , G11B7/004 , G11B7/005 , G11B7/007 , G11B7/24 , G11B7/30 , G11B11/105 , G11B13/00 , G11B13/04 , G11B20/12 , G11B27/32
CPC分类号： G11B11/10584 , G11B11/10597 , G11B13/045 , G11B27/327 , G11B2020/1259 , G11B2220/211 , G11B2220/2525 , G11B7/0079
摘要： A recording medium is provided with a recording film having opto-magnetic characteristics formed on the substrate, with first information being recorded in advance in the form of pit strings of a phase structure. Second information is recorded over the first information through the application of a magnetic field with polarities corresponding to the second information in the presence of the irradiation of a high-power radiation beam, without damaging the record of the first information. The first and second information are produced independently and simultaneously with a single spot in the same area by use of different signal reproduction mechanisms for the first information and second information. The first information (ROM information) is reproduced as the variation in the amount (intensity) of the reflected light from the opto-magnetic recording film, and the second information (RAM information) is reproduced by detecting the rotational angle of the reflected light, based on the Kerr effect, from the opto-magnetic film concurrently with the reproduction of the first information using a single spot.
摘要翻译： 记录介质设置有具有形成在基板上的光磁特性的记录膜，其中预先以相位结构的凹坑串的形式记录第一信息。 在存在高功率辐射束的照射的情况下，通过施加具有与第二信息对应的极性的磁场，在第一信息上记录第二信息，而不损害第一信息的记录。 通过对于第一信息和第二信息使用不同的信号再现机制，第一和第二信息与同一区域中的单个点独立地同时产生。 第一信息（ROM信息）被再现为来自光电记录膜的反射光的量（强度）的变化，并且通过检测反射光的旋转角度再现第二信息（RAM信息） 基于克尔效应，从与使用单个点的第一信息的再现同时的光磁膜。
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10.发明授权Method and apparatus for composite tracking servo system with track offset correction and rotary optical disc having at least one correction mark for correcting track offset 失效具有轨道偏移校正和旋转光盘的复合跟踪伺服系统的方法和装置，其具有用于校正轨道偏移的至少一个校正标记
公开(公告)号：US4748609A
公开(公告)日：1988-05-31
申请号：US845340
申请日：1986-03-28
申请人： Seiji Yonezawa , Masatoshi Ohtake , Masaru Ito , Toshiaki Tsuyoshi , Kazuo Ichino , Harushige Nakagaki
发明人： Seiji Yonezawa , Masatoshi Ohtake , Masaru Ito , Toshiaki Tsuyoshi , Kazuo Ichino , Harushige Nakagaki
CPC分类号： G11B7/24085 , G11B7/094 , G11B7/0948 , G11B7/0956 , G11B7/0901 , G11B7/0904
摘要： A composite wobbled tracking servo system uses a rotary optical disc which has a header field and a data field alternately arranged along the direction of rotation to provide a sector, and which includes pregrooves formed in at least the data field and at least one pair of wobbled track marks disposed in the header field in a relation wobbled relative to the center of a track. A light spot is directed toward and onto the optical disc to detect a push-pull tracking error signal from the reflection of the light spot diffracted by the pregroove, and a wobbled tracking error signal is detected from the reflection of the light spot traversing the wobbled track marks. The push-pull tracking error signal is corrected on the basis of the wobbled tracking error signal to attain the tracking control with higher accuracy, thereby eliminating an undesirable track offset attributable to tilting or eccentricity of the optical disc.
摘要翻译： 复合摆动跟踪伺服系统使用旋转光盘，其具有沿着旋转方向交替布置的报头字段和数据字段以提供扇区，并且其包括形成在至少数据字段中的预槽和至少一对摆动的 轨道标记以相对于轨道的中心摆动的关系设置在头部区域中。 光点指向光盘，以从由预制槽衍射的光点的反射检测推挽跟踪误差信号，并且从穿过波动的光点的反射中检测摆动的跟踪误差信号 轨迹 基于摆动的跟踪误差信号校正推挽跟踪误差信号，以更高的精度实现跟踪控制，从而消除由于光盘的倾斜或偏心引起的不期望的轨迹偏移。
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