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：US08593754B2

公开(公告)日：2013-11-26

申请号：US13115163

申请日：2011-05-25

申请人： Masao Fujita ,  Sadamu Kuse

发明人： Masao Fujita ,  Sadamu Kuse

IPC分类号： G11B21/02

CPC分类号： G11B5/4893 ,  G11B5/00813 ,  G11B5/40

摘要： A magnetic tape driving apparatus, which does not cause damage to either a magnetic head or a magnetic tape when making transition of the magnetic tape from a stopped state to a running state, when making transition of the magnetic tape from a running state to a stopped state, or when reversing the transportation direction of the magnetic tape, is provided. In a state where any one of a magnetic head and a magnetic tape moves and the other rests (i.e., a state where static friction may occur), such as at the time of starting transportation of the magnetic tape, at the time of stopping the tape in a running state, and at the time of reversing the transportation direction of the magnetic tape, a head displacing portion vibrates the magnetic head under the control by a displacement control portion, and thus no static friction occurs between the magnetic head and the magnetic tape. Therefore, the risk of causing damage to the magnetic head (such as an MR head unit equipped with an MR element) or the magnetic tape can be reduced.

摘要翻译： 一种磁带驱动装置，当使磁带从运行状态转移到停止状态时，在使磁带从停止状态转移到运行状态时不会对磁头或磁带造成损坏 状态，或者当使磁带的运送方向反转时。 在磁头和磁带中的任何一个移动的状态下，另一个位置（即，可能发生静摩擦的状态），例如在开始运送磁带时，在停止时 胶带处于运行状态，并且在反转磁带的传送方向时，磁头位移部分在位移控制部分的控制下使磁头振动，从而在磁头和磁体之间不产生静摩擦 胶带。 因此，可以减少对磁头（例如配备有MR元件的MR头单元）或磁带造成损害的风险。

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：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：US20110292539A1

公开(公告)日：2011-12-01

申请号：US13115163

申请日：2011-05-25

申请人： Masao FUJITA ,  Sadamu Kuse

发明人： Masao FUJITA ,  Sadamu Kuse

IPC分类号： G11B15/48 ,  G11B5/584

CPC分类号： G11B5/4893 ,  G11B5/00813 ,  G11B5/40

摘要： A magnetic tape driving apparatus, which does not cause damage to either a magnetic head or a magnetic tape when making transition of the magnetic tape from a stopped state to a running state, when making transition of the magnetic tape from a running state to a stopped state, or when reversing the transportation direction of the magnetic tape, is provided. In a state where any one of a magnetic head and a magnetic tape moves and the other rests (i.e., a state where static friction may occur), such as at the time of starting transportation of the magnetic tape, at the time of stopping the tape in a running state, and at the time of reversing the transportation direction of the magnetic tape, a head displacing portion vibrates the magnetic head under the control by a displacement control portion, and thus no static friction occurs between the magnetic head and the magnetic tape. Therefore, the risk of causing damage to the magnetic head (such as an MR head unit equipped with an MR element) or the magnetic tape can be reduced.

摘要翻译： 一种磁带驱动装置，当使磁带从运行状态转移到停止状态时，在使磁带从停止状态转移到运行状态时不会对磁头或磁带造成损坏 状态，或者当使磁带的运送方向反转时。 在磁头和磁带中的任何一个移动的状态下，另一个位置（即，可能发生静摩擦的状态），例如在开始运送磁带时，在停止时 胶带处于运行状态，并且在反转磁带的传送方向时，磁头位移部分在位移控制部分的控制下使磁头振动，从而在磁头和磁体之间不产生静摩擦 胶带。 因此，可以减少对磁头（例如配备有MR元件的MR头单元）或磁带造成损害的风险。

公开(公告)号：US08068308B2

公开(公告)日：2011-11-29

申请号：US12476773

申请日：2009-06-02

申请人： Masao Fujita ,  Shinji Kawakami ,  Toshio Kawakita ,  Sadamu Kuse

发明人： Masao Fujita ,  Shinji Kawakami ,  Toshio Kawakita ,  Sadamu Kuse

IPC分类号： G11B5/584 ,  G11B21/02

CPC分类号： G11B5/584

摘要： In the apparatus and method of the invention, a servo signal reproduction unit generates a PES from a servo signal reproduced from a magnetic tape, and a frequency conversion unit performs FFT processing of the PES to generate frequency component information. Then, a filter value generation unit generates filter values based on the frequency component information and writes these to a memory. When recording various data signals to the magnetic tape, the filter values are read from the memory and a control filter serving as a notch filter is incorporated into a feedback control for a tracking servo. This enables periodic and narrow-band noise to be removed from a PES, consequently reducing PESs. Accordingly, learning-type optimum notch filter control that allows a magnetic head to follow recording tracks at high speed and with high precision is possible even when the recording track width is reduced and the tape speed is increased.

摘要翻译： 在本发明的装置和方法中，伺服信号再现单元从从磁带再现的伺服信号产生PES，并且频率转换单元执行PES的FFT处理以产生频率分量信息。 然后，滤波器值生成单元基于频率分量信息生成滤波器值，并将其写入存储器。 当将各种数据信号记录到磁带上时，从存储器中读取滤波器值，并且将用作陷波滤波器的控制滤波器并入用于跟踪伺服的反馈控制。 这使得能够从PES去除周期性和窄带噪声，从而减少PES。 因此，即使当记录磁道宽度减小并且磁带速度增加时，也可以使磁头以高速和高精度跟随记录磁道的学习型最佳陷波滤波器控制。

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：US08159776B2

公开(公告)日：2012-04-17

申请号：US12104923

申请日：2008-04-17

申请人： Masao Fujita ,  Sadamu Kuse

发明人： Masao Fujita ,  Sadamu Kuse

IPC分类号： G11B5/008

CPC分类号： G11B5/54 ,  G11B15/12 ,  G11B15/44 ,  G11B15/62

摘要： A magnetic tape driving apparatus of the present invention includes a support member for separating a magnetic tape from a magnetic head on at least one of a tape input side and a tape output side of the magnetic head. The support member separates the magnetic tape from the magnetic head at least when a tape driving portion causes the magnetic tape to start running and/or to stop running. With this configuration, the magnetic tape driving apparatus does not suffer from damage to the magnetic head and the magnetic tape when the magnetic tape makes a transition from the stopped state to the running state and vice versa or changes in the running direction.

摘要翻译： 本发明的磁带驱动装置包括用于在磁头的磁带输入侧和磁带输出侧中的至少一个上从磁头分离磁带的支撑部件。 至少当磁带驱动部分使磁带开始运行和/或停止运行时，支撑部件将磁带与磁头分开。 利用这种结构，磁带驱动装置在磁带从停止状态转变为运行状态或反之亦然或运行方向变化时，不会损坏磁头和磁带。

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。