公开(公告)号：US4777553A

公开(公告)日：1988-10-11

申请号：US919424

申请日：1986-10-16

申请人： Hajime Aoi ,  Fumio Kugiya ,  Takashi Tamura

发明人： Hajime Aoi ,  Fumio Kugiya ,  Takashi Tamura

IPC分类号： G11B5/02 ,  G11B5/127 ,  G11B5/31 ,  G11B5/39 ,  G11B11/10 ,  G11B11/105 ,  G11B5/12 ,  G11B5/22

CPC分类号： G11B5/1278 ,  G11B11/10547 ,  G11B5/39 ,  G11B5/3183

摘要： A magnetic head for reading-out information magnetically recorded on a magnetic recording medium in a waveform varying between two different phases. The magnetic head includes at least one block of high magnetic permeability disposed adjacent to and directly facing a surface of the magnetic recording medium to be read-out so as to provide a magnetic path for passing therethrough magnetic flux emanating from the magnetic record on the magnetic recording medium. A magnetic material member is disposed adjacent to the at least one block so as to cause the magnetic flux emanating from the magnetic record on the magnetic recording medium to pass therethrough and is responsive to transition of the magnetic flux corresponding to variation from one phase to another phase in the waveform representing the recorded information so as to provide a predetermined physical effect. Further, a detecting arrangement is provided for the detecting the predetermined physical effect.

摘要翻译： 一种磁头，用于以两个不同相位之间变化的波形读出磁记录在磁记录介质上的信息。 磁头包括至少一个高磁导率块，其邻近并直接面向待读出的磁记录介质的表面，以便提供一个磁路，用于通过从磁记录发出的磁通量磁化 记录介质。 磁性材料构件被布置成与至少一个块相邻，以便使从磁记录介质上的磁记录发出的磁通量通过其中，并响应于对应于从一个相变到另一相的磁通的转变 表示记录信息的波形相位，以便提供预定的物理效果。 此外，提供了用于检测预定物理效果的检测装置。

公开(公告)号：US4755891A

公开(公告)日：1988-07-05

申请号：US898212

申请日：1986-08-20

申请人： Yasuhiro Katoh ,  Fumio Kugiya ,  Hajime Aoi

发明人： Yasuhiro Katoh ,  Fumio Kugiya ,  Hajime Aoi

IPC分类号： G11B5/09 ,  G11B5/02 ,  G11B20/10 ,  G11B5/23

CPC分类号： G11B20/10046 ,  G11B20/10009 ,  G11B5/02

摘要： In a waveform processing circuit comprising a delay line for delaying a signal outputted from a ring type magnetic head reproducing a perpendicular magnetization recording, an attenuator for attenuating the signal delivered out of the ring type magnetic head, and a differential amplifier for receiving outputs from the delay line and the attenuator, wherein a waveform of the signal is processed to discriminate a position of magnetization transition based on the waveform of the signal; the delay time .tau. of the delay line is selected to satisfyv.multidot..tau..ltoreq.gwhere, v is a relative speed between the recording medium and the magnetic head and g indicates the gap length of the magnetic head.

摘要翻译： 在波形处理电路中，包括用于延迟从再现垂直磁化记录的环形磁头输出的信号的延迟线，用于衰减从环型磁头输出的信号的衰减器，以及差分放大器，用于接收来自 延迟线和衰减器，其中处理信号的波形以基于信号的波形来识别磁化转变的位置; 选择延迟线的延迟时间τ以满足vx tau，其中v是记录介质和磁头之间的相对速度，g表示磁头的间隙长度。

公开(公告)号：US5568331A

公开(公告)日：1996-10-22

申请号：US603320

申请日：1990-10-25

申请人： Kyo Akagi ,  Masaaki Futamoto ,  Fumio Kugiya ,  Yoshinori Miyamura ,  Hisashi Takano ,  Yoshibumi Matsuda ,  Mikio Suzuki ,  Takeshi Nakao ,  Takayuki Munemoto ,  Hirotsugu Fukuoka ,  Makoto Aihara ,  Tokuho Takagaki ,  Hajime Aoi ,  Yosuke Seo

发明人： Kyo Akagi ,  Masaaki Futamoto ,  Fumio Kugiya ,  Yoshinori Miyamura ,  Hisashi Takano ,  Yoshibumi Matsuda ,  Mikio Suzuki ,  Takeshi Nakao ,  Takayuki Munemoto ,  Hirotsugu Fukuoka ,  Makoto Aihara ,  Tokuho Takagaki ,  Hajime Aoi ,  Yosuke Seo

IPC分类号： G11B5/584 ,  G11B5/596

CPC分类号： G11B5/59688 ,  G11B5/584

摘要： A method and device of head positioning in an information recording/reading device in which a magnetic recording medium with data tracks for recording information thereon is provided and a magnetic head is positioned on the data track to record/read out the information, wherein a data signal is recorded in the data recording layer of said recording medium, a servo signal is recorded in the servo signal recording layer located below said data signal recording layer, said data signal is read out using a data magnetic head whereas said servo signal is read out using a servo magnetic head, and the frequency of said servo signal is within the range of the gap-null frequency of said data magnetic head whereas the frequency of said data signal is within the range of the gap-null frequency of said servo magnetic head, and said magnetic head is positioned on the data track on the basis of said servo signal. A method and device of head positioning in an information recording/reading device in which a magnetic recording medium with data tracks for recording information thereon is provided and a magnetic head is positioned on the data track to record/read out the information, wherein the data tracks are discrete tracks in which adjacent data tracks are separated by a groove located therebetween, a data signal is recorded on the data track of said recording medium, a servo signal is recorded on the servo tracks of grooves between said adjacent data tracks, and said magnetic head is positioned on the data track on the basis of said servo signal.

摘要翻译： 一种在信息记录/读取装置中头部定位的方法和装置，其中提供具有用于记录信息的数据轨道的磁记录介质，并且磁头位于数据轨道上以记录/读出信息，其中数据 信号被记录在所述记录介质的数据记录层中，伺服信号被记录在位于所述数据信号记录层下方的伺服信号记录层中，所述数据信号使用数据磁头读出，而所述伺服信号被读出 使用伺服磁头，并且所述伺服信号的频率在所述数据磁头的间隙零频率的范围内，而所述数据信号的频率在所述伺服磁头的间隙空位频率的范围内 并且所述磁头基于所述伺服信号位于数据轨道上。 一种在信息记录/读取装置中头部定位的方法和装置，其中提供具有用于记录信息的数据轨道的磁记录介质，并且磁头位于数据轨道上以记录/读出信息，其中数据 轨道是离散轨道，其中相邻数据轨道由位于其间的凹槽分开，数据信号被记录在所述记录介质的数据轨道上，伺服信号被记录在所述相邻数据轨道之间的凹槽的伺服轨道上，并且所述 磁头基于所述伺服信号位于数据轨道上。

公开(公告)号：US4249219A

公开(公告)日：1981-02-03

申请号：US42590

申请日：1979-05-24

申请人： Hajime Aoi ,  Takashi Tamura ,  Makoto Koizumi ,  Noboru Kunimi ,  Minoru Enomoto ,  Noriaki Hatanaka

发明人： Hajime Aoi ,  Takashi Tamura ,  Makoto Koizumi ,  Noboru Kunimi ,  Minoru Enomoto ,  Noriaki Hatanaka

IPC分类号： G11B5/09 ,  G11B5/02 ,  H03K17/64

CPC分类号： G11B5/02 ,  H03K17/64

摘要： A current drive circuit for an induction coil is provided comprising a clamp circuit connected to the two terminals of the coil. This clamp circuit prevents the voltages of the two terminals from dropping below a reference voltage, thereby preventing decreases of the amplifier constants h.sub.FE of the transistors which are also coupled to the two terminals for a read-out operation.

摘要翻译： 提供一种用于感应线圈的电流驱动电路，包括连接到线圈的两个端子的钳位电路。 该钳位电路防止两个端子的电压下降到参考电压以下，从而防止也耦合到两个端子用于读出操作的晶体管的放大器常数hFE的降低。

公开(公告)号：US4774601A

公开(公告)日：1988-09-27

申请号：US940494

申请日：1986-12-10

申请人： Yasuhide Ouchi ,  Hajime Aoi ,  Takashi Tamura ,  Nobumasa Nishiyama

发明人： Yasuhide Ouchi ,  Hajime Aoi ,  Takashi Tamura ,  Nobumasa Nishiyama

IPC分类号： G11B5/09 ,  G11B20/10

CPC分类号： G11B20/10009 ,  G11B20/10

摘要： In a read channel for magnetic recording used to reproduce information recorded on a magnetic recording medium, a signal reproduced from a magnetic head and a differentiated signal of the reproduction signal are ORed together to produce a gate signal. By using the gate signal, the information can be reproduced correctly.

摘要翻译： 在用于再现记录在磁记录介质上的信息的用于磁记录的读取通道中，从磁头再现的信号和再现信号的微分信号被或者并联在一起以产生一个门信号。 通过使用门信号，可以正确地再现信息。

公开(公告)号：US4823208A

公开(公告)日：1989-04-18

申请号：US76009

申请日：1987-07-21

申请人： Yasuhide Ouchi ,  Hajime Aoi ,  Nobumasa Nishiyama ,  Takashi Tamura ,  Makoto Saitoh ,  Reijiro Tsuchiya

发明人： Yasuhide Ouchi ,  Hajime Aoi ,  Nobumasa Nishiyama ,  Takashi Tamura ,  Makoto Saitoh ,  Reijiro Tsuchiya

IPC分类号： G11B20/10 ,  G11B5/09

CPC分类号： G11B20/10009

摘要： A signal read out circuit included in a magnetic recording device is disclosed in which plural kinds of slice levels are used simultaneously for a reproduced analog waveform to produce a plurality of gate signals corresponding to the slice levels, and it is judged on the basis of the gate signals whether each portion of the reproduced waveform is correct or not in producing a digital output.

摘要翻译： 公开了包括在磁记录装置中的信号读出电路，其中同时使用多种切片电平用于再现的模拟波形，以产生与切片电平相对应的多个门信号，并且基于 门信号是否产生数字输出，再现波形的每个部分是否正确。

公开(公告)号：US4851939A

公开(公告)日：1989-07-25

申请号：US048587

申请日：1987-05-11

申请人： Yosuke Seo ,  Yoshiyuki Hirano ,  Hajime Aoi ,  Takashi Tamura ,  Kazuyoshi Nakabayashi

发明人： Yosuke Seo ,  Yoshiyuki Hirano ,  Hajime Aoi ,  Takashi Tamura ,  Kazuyoshi Nakabayashi

IPC分类号： G11B21/08 ,  G11B5/012 ,  G11B5/55

CPC分类号： G11B5/5547 ,  G11B5/012

摘要： In a magnetic disk drive apparatus having a plurality of actuators, or a magnetic disk drive system constructed of a plurality of head disk assemblies (HDA's); a magnetic disk drive apparatus or system in which the actuators included in the above apparatus or system can be arbitrarily and selectively coupled with a plurality of access control circuits and high power amplifiers that are smaller in number than the actuators.

摘要翻译： 在具有多个致动器的磁盘驱动装置或由多个头盘组件（HDA）构成的磁盘驱动系统中; 包括在上述装置或系统中的致动器可以与数量小于致动器的多个访问控制电路和大功率放大器任意地和选择性地耦合的磁盘驱动装置或系统。

公开(公告)号：US4651236A

公开(公告)日：1987-03-17

申请号：US817037

申请日：1986-01-08

申请人： Yasuhide Ouchi ,  Hajime Aoi ,  Takashi Tamura ,  Kazuyoshi Nakabayashi ,  Takamasa Uchiyama

发明人： Yasuhide Ouchi ,  Hajime Aoi ,  Takashi Tamura ,  Kazuyoshi Nakabayashi ,  Takamasa Uchiyama

IPC分类号： H03M5/04 ,  G11B5/035 ,  G11B5/09 ,  G11B20/10 ,  G11B20/22 ,  G11B5/03

CPC分类号： G11B20/10212 ,  G11B20/22 ,  G11B5/035

摘要： A waveform equalizing circuit including a delay line, an attenuator, and a differential amplifier applied with the outputs of the delay line and attenuator is disclosed in which the delay time of the delay line and the attenuation factor of the attenuator are changed in accordance with the characteristic of a waveform applied to the delay line and attenuator.

摘要翻译： 公开了包括延迟线，衰减器和施加延迟线和衰减器的输出的差分放大器的波形均衡电路，其中延迟线的延迟时间和衰减器的衰减因子根据 施加到延迟线和衰减器的波形的特性。

公开(公告)号：US4644424A

公开(公告)日：1987-02-17

申请号：US685118

申请日：1984-12-21

申请人： Nobumasa Nishiyama ,  Hajime Aoi ,  Takashi Tamura ,  Yasuhide Ouchi ,  Makoto Saitou

发明人： Nobumasa Nishiyama ,  Hajime Aoi ,  Takashi Tamura ,  Yasuhide Ouchi ,  Makoto Saitou

IPC分类号： G11B5/035 ,  G11B5/09 ,  H03H15/00 ,  H03H17/00 ,  H03H21/00 ,  H04B3/04 ,  G11B5/02 ,  H03H11/06 ,  H04B3/14

CPC分类号： G11B5/035 ,  G11B5/09

摘要： An equalizer equalizes a reproduced waveform reproduced by a thin film magnetic head by reproducing information recorded magnetically on a medium. In the equalizer, the reproduced waveform is delayed to a position of an undershot portion, and is attenuated to an amplitude corresponding to a magnitude of the undershot portion, and the resultant waveform is superposed on the reproduced waveform, to thereby eliminate the undershot portion. Furthermore, by superposing a waveform obtained by inverting the reproduced waveform and amplifying or attenuating the inverted waveform, on the reproduced waveform at a half power position thereof, the width is narrowed.

摘要翻译： 均衡器通过再现磁介质上记录的信息来均衡由薄膜磁头再现的再现波形。 在均衡器中，再生波形被延迟到下方的位置，并且被衰减到对应于低音部分的幅度的振幅，并且所得到的波形叠加在再现波形上，从而消除了低音部分。 此外，通过叠加通过反转再现波形而获得的波形并放大或衰减反相波形，在其半功率位置处的再现波形上，宽度变窄。

公开(公告)号：US06243824B1

公开(公告)日：2001-06-05

申请号：US08355210

申请日：1994-12-09

申请人： Hitoshi Kakuta ,  Yoshihisa Kamo ,  Hajime Aoi

发明人： Hitoshi Kakuta ,  Yoshihisa Kamo ,  Hajime Aoi

IPC分类号： H02H305

CPC分类号： G06F11/1076 ,  G06F3/0601 ,  G06F11/1466 ,  G06F2003/0692 ,  G06F2211/109

摘要： An array disk subsystem including a command selector for separating a signal from a host into a data item and a command, a data dividing unit for subdividing the data item, an ECC generator for producing an ECC for each of the obtained subdata items, a group of data disks for respectively storing thereon the subdata items and the ECCs, a command interpreting unit for interpreting the command, an I/O counter for counting I/O commands in the command, a backup processor for requesting a backup command based on count information of the I/O counter, and a backup unit responsive to the backup command for sequentially reading the subdata items and the ECCs from the data disks to record therein the subdata items and the ECCs.

摘要翻译： 一种阵列磁盘子系统，包括用于将信号从主机分离为数据项和命令的命令选择器，用于细分数据项的数据划分单元，用于为每个所获得的子数据项产生ECC的ECC产生器， 用于分别存储子数据项和ECC的数据磁盘，用于解释命令的命令解释单元，用于对命令中的I / O命令进行计数的I / O计数器，用于根据计数信息请求备份命令的备份处理器 的I / O计数器，以及响应于备份命令的备份单元，用于从数据盘顺序读取子数据项和ECC，以在其中记录子数据项和ECC。