公开(公告)号：US08081559B2

公开(公告)日：2011-12-20

申请号：US11960439

申请日：2007-12-19

申请人： Masao Fujita ,  Kenji Tanaka ,  Shinji Kawakami ,  Sadamu Kuse

发明人： Masao Fujita ,  Kenji Tanaka ,  Shinji Kawakami ,  Sadamu Kuse

IPC分类号： G11B7/00

CPC分类号： G11B5/584 ,  G11B5/59677

摘要： The present invention provides a recording and reproducing apparatus that can perform high-precision tracking servo control by removing noise from detected servo signals. The recording and reproducing apparatus performs tracking servo control while reading servo signals 10 that are formed on a surface 9 of a recording medium 2 so as to produce optical contrast, the apparatus including a modulated irradiator 20 for irradiating the servo signals 10 with a light beam, the intensity of the light beam being modulated by a modulating wave that is frequency-modulated; a photoelectric converter 30 for converting reflected light from the servo signals 10 into electric signals; and a synchronous demodulator 15 for subjecting the electrical signal to synchronous demodulation using the modulating wave as a reference wave.

摘要翻译： 本发明提供了一种通过从检测到的伺服信号中去除噪声来执行高精度跟踪伺服控制的记录和再现装置。 记录和重放装置执行跟踪伺服控制，同时读取形成在记录介质2的表面9上的伺服信号10以便产生光学对比度，该装置包括调制辐射器20，用于用光束照射伺服信号10 光束的强度由被调制的调制波调制; 用于将来自伺服信号10的反射光转换为电信号的光电转换器30; 以及用于使用调制波作为参考波对电信号进行同步解调的同步解调器15。

公开(公告)号：US08027115B2

公开(公告)日：2011-09-27

申请号：US12213055

申请日：2008-06-13

申请人： Masao Fujita ,  Kenji Tanaka ,  Sadamu Kuse

发明人： Masao Fujita ,  Kenji Tanaka ,  Sadamu Kuse

IPC分类号： G11B5/02 ,  G11B5/09 ,  H04N5/77

CPC分类号： G11B27/034 ,  G06F3/0601 ,  G06F2003/0698 ,  G11B2220/95 ,  H04N5/77 ,  H04N5/775 ,  H04N5/782 ,  H04N9/8042

摘要： A data recording apparatus and a data recording system of the present invention includes buffer memories 2a to 2c that accumulate data in a plurality of channels transferred from an external appliance on a channel basis, a data selector 3 that reads the data accumulated in the buffer memories 2a to 2c, and a data drive 4 that records the data read by the data selector 3 onto a magnetic tape, wherein the data selector 3 selectively reads the data accumulated in the buffer memories 2a to 2c, and outputs the data in an order of recording onto a magnetic tape in the tape drive 4. According to such a configuration, a data recording apparatus that can be realized at low cost and a recording system using the data recording apparatus can be provided.

摘要翻译： 本发明的数据记录装置和数据记录系统包括：缓冲存储器2a至2c，其累积从外部设备在信道上传送的多个信道中的数据;数据选择器3，其读取累积在缓冲存储器中的数据 以及数据驱动器4，其将由数据选择器3读取的数据记录到磁带上，其中数据选择器3选择性地读取累积在缓冲存储器2a至2c中的数据，并按照 记录在磁带驱动器4中的磁带上。根据这种配置，可以提供可以以低成本实现的数据记录装置和使用数据记录装置的记录系统。

公开(公告)号：US09165586B2

公开(公告)日：2015-10-20

申请号：US13330219

申请日：2011-12-19

申请人： Shinji Kawakami ,  Sadamu Kuse ,  Kenji Tanaka

发明人： Shinji Kawakami ,  Sadamu Kuse ,  Kenji Tanaka

IPC分类号： G11B5/706 ,  G11B5/70 ,  G11B5/714

CPC分类号： G11B5/714 ,  G11B5/70 ,  G11B5/70678

摘要： The magnetic recording medium of the present invention comprises: a non-magnetic substrate; a non-magnetic layer formed on one of principal surfaces of the non-magnetic substrate; and a magnetic layer formed on a principal surface of the non-magnetic layer opposite to the non-magnetic substrate. Mr and t satisfy 0.0020 μT·m≦Mr·t≦0.0150 μT·m, where Mr is the residual magnetic flux density of the magnetic layer, and t is the average thickness of the magnetic layer, L1 satisfies 2 nm≦L1≦6 nm, where L1 is the average thickness of a first mixed layer that is formed on the surface of the magnetic layer opposite to the non-magnetic layer, and L2 satisfies 0.1≦L2/t≦0.45, where L2 is the average thickness of a second mixed layer that is formed on the surface of the magnetic layer facing the non-magnetic layer.

摘要翻译： 本发明的磁记录介质包括：非磁性基片; 形成在非磁性基板的一个主表面上的非磁性层; 以及形成在与非磁性基板相对的非磁性层的主表面上的磁性层。 Mr和t满足0.0020μT·m＆nlE; Mr·t＆nlE; 0.0150μT·m，其中Mr是磁性层的剩余磁通密度，t是磁性层的平均厚度，L1满足2nm＆nlE; L1＆nlE; 6 nm，其中L1是形成在与非磁性层相反的磁性层的表面上的第一混合层的平均厚度，并且L2满足0.1＆lt; lE; L2 / t＆nlE; 0.45，其中L2是 形成在面向非磁性层的磁性层的表面上的第二混合层。

公开(公告)号：US07808736B2

公开(公告)日：2010-10-05

申请号：US12019344

申请日：2008-01-24

申请人： Kenji Tanaka ,  Kenichiro Yoshida ,  Masao Fujita ,  Sadamu Kuse

发明人： Kenji Tanaka ,  Kenichiro Yoshida ,  Masao Fujita ,  Sadamu Kuse

IPC分类号： G11B5/09 ,  G11B21/02 ,  G11B5/03

CPC分类号： G11B5/584 ,  G11B5/024

摘要： A servo signal recording apparatus and servo-signal recording method for recording a servo signal on a magnetic tape that includes a magnetic layer having a data area capable of storing data and a servo area capable of storing a servo signal, the apparatus including a transportation unit for transporting the magnetic tape; a direct current (DC) erasing unit on a downstream side in a magnetic tape transportation direction that performs DC erasure to a surface layer portion of the magnetic layer by magnetization in a longitudinal direction of the magnetic tape; and a servo signal recording unit on a downstream side of the DC erasing unit in the magnetic tape transportation direction, that rubs against the magnetic layer of the magnetic tape, and records a servo signal in the servo area by magnetization in a direction opposite to a direction of the magnetization of the DC erasing unit.

摘要翻译： 一种用于在包括具有能够存储数据的数据区的磁性层和能够存储伺服信号的伺服区的磁带上记录伺服信号的伺服信号记录装置和伺服信号记录方法，所述装置包括传送单元 用于运送磁带; 在磁带传送方向下游侧的直流（DC）擦除单元，其通过磁带的长度方向的磁化对磁性层的表层部进行直流擦除; 以及伺服信号记录单元，其在磁带传送方向上的直流擦除单元的下游侧，摩擦磁带的磁性层，并且通过磁化沿与磁带的相反方向的磁化将伺服信号记录在伺服区域中 直流擦除单元的磁化方向。

公开(公告)号：US20080225432A1

公开(公告)日：2008-09-18

申请号：US12045820

申请日：2008-03-11

申请人： Kenji TANAKA ,  Sadamu Kuse

发明人： Kenji TANAKA ,  Sadamu Kuse

IPC分类号： G11B15/00 ,  G11B5/008

CPC分类号： G11B5/00826 ,  G11B5/4893 ,  G11B5/584 ,  G11B15/60

摘要： In a magnetic tape apparatus of the present invention, a magnetic head unit having magnetic elements capable of recording or reproducing information with respect to a magnetic tape includes a movable member that includes a magnetic element and has such a size that the movable member comes into contact with the magnetic tape over an entire region in a width direction, and is placed so as to move in the width direction of the magnetic tape, and a stationary member that is placed at a position adjacent to the movable member in a magnetic tape transport direction, wherein the movable member is moved in the width direction of the magnetic tape by a tracking servo mechanism during a tracking servo control. According to this configuration, a magnetic tape apparatus excellent in a tracking precision can be provided, in which even a magnetic tape with a high friction coefficient does not move following the movement of a magnetic head unit in the width direction.

摘要翻译： 在本发明的磁带装置中，具有能够记录或再现关于磁带的信息的磁性元件的磁头单元包括可移动部件，其包括磁性元件，并且具有可移动部件接触的尺寸 使磁带在宽度方向上的整个区域上，并且被放置成沿着磁带的宽度方向移动;以及静止部件，其被配置在磁带传送方向上与可动部件相邻的位置 其特征在于，在跟踪伺服控制期间，所述可动部件通过跟踪伺服机构在所述磁带的宽度方向上移动。 根据该结构，可以提供一种跟踪精度优异的磁带装置，其中即使在磁头单元沿宽度方向的移动之后，具有高摩擦系数的磁带也不会移动。

公开(公告)号：US08130463B2

公开(公告)日：2012-03-06

申请号：US12128156

申请日：2008-05-28

申请人： Masao Fujita ,  Kenji Tanaka ,  Sadamu Kuse

发明人： Masao Fujita ,  Kenji Tanaka ,  Sadamu Kuse

IPC分类号： G11B21/02

CPC分类号： G11B5/00813 ,  G11B5/02 ,  G11B5/022 ,  G11B2005/0005

摘要： A data recording apparatus of the present invention includes a head that records data signals by magnetizing a magnetic tape 10 and a recording control portion that controls the recording operation by causing recording current to flow to the head. The recording control portion controls the operation of the head, so that in the magnetic tape 10, which is direct current demagnetized continuously in the longitudinal direction, a magnetic field is formed intermittently in an opposite direction to the magnetization direction of the direct current demagnetization. Thus, when recording data signals on the magnetic recording medium, it is possible to make the current flowing to the head small and to realize apparatus power consumption reductions, load reductions for the head and circuitry, and reduction in crosstalk noise from the head chip used for writing to the head chip used for reading.

摘要翻译： 本发明的数据记录装置包括通过磁化磁带10记录数据信号的磁头和通过使记录电流流向磁头来控制记录操作的记录控制部分。 记录控制部分控制磁头的操作，使得在沿着纵向方向连续地退磁的磁带10中，在与直流退磁的磁化方向相反的方向间歇地形成磁场。 因此，当在磁记录介质上记录数据信号时，可以使流过头部的电流变小，并实现设备功耗降低，头部和电路的负载降低，以及减少来自头部芯片的串扰噪声 用于写入用于阅读的头部芯片。

公开(公告)号：US07961423B2

公开(公告)日：2011-06-14

申请号：US12479120

申请日：2009-06-05

申请人： Kenji Tanaka ,  Kenichiro Yoshida ,  Sadamu Kuse

发明人： Kenji Tanaka ,  Kenichiro Yoshida ,  Sadamu Kuse

IPC分类号： G11B5/584

CPC分类号： G11B5/584

摘要： The information recording apparatus of the present invention includes N servo heads. Servo signals outputted respectively from the servo heads are delayed by a delay circuit such that the peaks of the waveforms of the servo signals coincide with each other. The delayed servo signals are added up by an adder. Thus, the output level of the servo signal can be increased by N times and the S/N ratio of the servo signal can be also increased by √N times. As a result, the precision of PES improves and the amount of off-track can be reduced. Therefore, even if a magnetic layer in magnetic tape has a small thickness, it is possible to prevent the decline of the output level of the servo signal and the S/N ratio.

摘要翻译： 本发明的信息记录装置包括N个伺服磁头。 分别从伺服磁头输出的伺服信号由延迟电路延迟使得伺服信号的波形的峰值相互重合。 延迟的伺服信号由加法器相加。 因此，伺服信号的输出电平可以增加N次，并且伺服信号的S / N比也可以增加√N倍。 结果，PES的精度提高，离轨量可以减少。 因此，即使磁带中的磁性层具有小的厚度，也可以防止伺服信号的输出电平和S / N比的下降。

公开(公告)号：US20080310044A1

公开(公告)日：2008-12-18

申请号：US12213055

申请日：2008-06-13

申请人： Masao Fujita ,  Kenji Tanaka ,  Sadamu Kuse

发明人： Masao Fujita ,  Kenji Tanaka ,  Sadamu Kuse

IPC分类号： G11B5/02

CPC分类号： G11B27/034 ,  G06F3/0601 ,  G06F2003/0698 ,  G11B2220/95 ,  H04N5/77 ,  H04N5/775 ,  H04N5/782 ,  H04N9/8042

摘要： A data recording apparatus and a data recording system of the present invention includes buffer memories 2a to 2c that accumulate data in a plurality of channels transferred from an external appliance on a channel basis, a data selector 3 that reads the data accumulated in the buffer memories 2a to 2c, and a data drive 4 that records the data read by the data selector 3 onto a magnetic tape, wherein the data selector 3 selectively reads the data accumulated in the buffer memories 2a to 2c, and outputs the data in an order of recording onto a magnetic tape in the tape drive 4. According to such a configuration, a data recording apparatus that can be realized at low cost and a recording system using the data recording apparatus can be provided.

摘要翻译： 本发明的数据记录装置和数据记录系统包括：缓冲存储器2a至2c，其累积从外部设备在信道上传送的多个信道中的数据;数据选择器3，其读取累积在缓冲存储器中的数据 以及数据驱动器4，其将由数据选择器3读取的数据记录到磁带上，其中数据选择器3选择性地读取累积在缓冲存储器2a至2c中的数据，并按照 记录在磁带驱动器4中的磁带上。根据这种配置，可以提供可以以低成本实现的数据记录装置和使用数据记录装置的记录系统。

公开(公告)号：US20090310251A1

公开(公告)日：2009-12-17

申请号：US12479120

申请日：2009-06-05

申请人： Kenji TANAKA ,  Kenichiro Yoshida ,  Sadamu Kuse

发明人： Kenji TANAKA ,  Kenichiro Yoshida ,  Sadamu Kuse

IPC分类号： G11B5/584

CPC分类号： G11B5/584

摘要： The information recording apparatus of the present invention includes N servo heads. Servo signals outputted respectively from the servo heads are delayed by a delay circuit such that the peaks of the waveforms of the servo signals coincide with each other. The delayed servo signals are added up by an adder. Thus, the output level of the servo signal can be increased by N times and the S/N ratio of the servo signal can be also increased by √N times. As a result, the precision of PES improves and the amount of off-track can be reduced. Therefore, even if a magnetic layer in magnetic tape has a small thickness, it is possible to prevent the decline of the output level of the servo signal and the S/N ratio.

摘要翻译： 本发明的信息记录装置包括N个伺服磁头。 分别从伺服磁头输出的伺服信号由延迟电路延迟使得伺服信号的波形的峰值相互重合。 延迟的伺服信号由加法器相加。 因此，伺服信号的输出电平可以增加N次，并且伺服信号的S / N比也可以增加√N倍。 结果，PES的精度提高，离轨量可以减少。 因此，即使磁带中的磁性层具有小的厚度，也可以防止伺服信号的输出电平和S / N比的下降。

公开(公告)号：US20080151712A1

公开(公告)日：2008-06-26

申请号：US11960439

申请日：2007-12-19

申请人： Masao Fujita ,  Kenji Tanaka ,  Shinji Kawakami ,  Sadamu Kuse

发明人： Masao Fujita ,  Kenji Tanaka ,  Shinji Kawakami ,  Sadamu Kuse

IPC分类号： G11B5/09

CPC分类号： G11B5/584 ,  G11B5/59677

摘要： The present invention provides a recording and reproducing apparatus that can perform high-precision tracking servo control by removing noise from detected servo signals. The recording and reproducing apparatus performs tracking servo control while reading servo signals 10 that are formed on a surface 9 of a recording medium 2 so as to produce optical contrast, the apparatus including a modulated irradiator 20 for irradiating the servo signals 10 with a light beam, the intensity of the light beam being modulated by a modulating wave that is frequency-modulated; a photoelectric converter 30 for converting reflected light from the servo signals 10 into electric signals; and a synchronous demodulator 15 for subjecting the electrical signal to synchronous demodulation using the modulating wave as a reference wave.

摘要翻译： 本发明提供了一种通过从检测到的伺服信号中去除噪声来执行高精度跟踪伺服控制的记录和再现装置。 记录和重放装置执行跟踪伺服控制，同时读取形成在记录介质2的表面9上的伺服信号10以便产生光学对比度，该装置包括调制辐射器20，用于用光束照射伺服信号10 光束的强度由被调制的调制波调制; 用于将来自伺服信号10的反射光转换为电信号的光电转换器30; 以及用于使用调制波作为参考波对电信号进行同步解调的同步解调器15。