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151 条记录 (耗时 0.035 秒)

    Power transistor with over-current protection controller
    11.
    发明授权
    Power transistor with over-current protection controller 失效
    功率晶体管带过流保护控制器

    公开(公告)号：US06181186B2

    公开(公告)日：2001-01-30

    申请号：US09337678

    申请日：1999-06-22

    申请人： Yukio Itoh ,  Takao Arai

    发明人： Yukio Itoh ,  Takao Arai

    IPC分类号： H03K508

    CPC分类号： H03K17/0822

    摘要： A semiconductor device enables a semiconductor element to turn off accurately and quickly at the time of short circuit of the load to protect the semiconductor element from the short circuit of the load. The semiconductor device comprises a first switching measure for turning on/off a current flowing into the load, a current detector for detecting current flowing into the load, a second switching measure for turning on/off a connection between the current detector and the load, and a controller for controlling the first switching measure and the second switching measure. The controller turns on the first switching measure, before turning on the second switching measure at the start of driving of the load. The current detector turns off the first switching measure when detecting excess current.

    摘要翻译： 半导体器件使半导体元件能够在负载短路时精确而快速地关断，以保护半导体元件免受负载的短路。 半导体器件包括用于接通/关断流入负载的电流的第一开关测量，用于检测流入负载的电流的电流检测器，用于接通/断开电流检测器与负载之间的连接的第二切换措施， 以及控制器，用于控制第一切换措施和第二切换措施。 控制器打开第一个开关量程，然后在开始负载开始时打开第二个开关量程。 当检测到过电流时，电流检测器关闭第一个开关量程。

    Tracking control in apparatus for fast reproducing digital information signal from magnetic tape
    16.
    发明授权
    Tracking control in apparatus for fast reproducing digital information signal from magnetic tape 失效
    用于从磁带快速再现数字信息信号的设备中的跟踪控制

    公开(公告)号：US5532835A

    公开(公告)日：1996-07-02

    申请号：US441703

    申请日：1995-05-15

    申请人： Harushige Nakagaki ,  Naozumi Sugimura ,  Takao Arai ,  Yasunori Ohara

    发明人： Harushige Nakagaki ,  Naozumi Sugimura ,  Takao Arai ,  Yasunori Ohara

    IPC分类号： G11B15/18 ,  G11B15/467 ,  G11B27/00 ,  G11B27/30 ,  H04N5/7826 ,  H04N5/783 ,  H04N9/82 ,  H04N5/76 ,  G11B5/55 ,  G11B15/46 ,  H04N5/78

    CPC分类号： H04N5/783 ,  G11B15/1875 ,  G11B15/4672 ,  G11B15/4675 ,  G11B27/005 ,  G11B27/3027 ,  G11B2220/90 ,  H04N5/78263 ,  H04N9/8227

    摘要： The helical scan reproducing apparatus for magnetically recorded digital information signal reproduces the digital information from the magnetic tape wrapped around the rotary cylinder. The digital information signal is recorded on a plurality of recorded tracks of the magnetic tape. The magnetic heads of the rotary cylinder scan the recorded tracks to reproduce the digital information signal. The reproducing apparatus has the standard playback mode in which it is operated to reproduce at the standard speed and the fast playback mode in which it is operated to reproduce at a higher speed than the standard speed. The tracking control in the reproducing apparatus controls the speed of the magnetic tape so that in the fast playback mode the magnetic heads precisely trace the particular regions of the tracks which particular regions have data for fast playback mode recorded. Each of the tracks is divided into a plurality of blocks. Each of the blocks has recorded therein the digital information signal and an identification signal formed of a track number for indicating the corresponding track and a block number for indicating the corresponding block. At least one particular block of the blocks on each track has the digital information signal recorded for the fast playback mode. The particular blocks are dispersedly arranged over the plurality of tracks in such a manner that in the fast playback mode the magnetic heads scan the particular blocks along their scan path on the magnetic tape.

    摘要翻译： 用于磁记录数字信息信号的螺旋扫描再现装置从缠绕在旋转圆筒上的磁带再现数字信息。 数字信息信号被记录在磁带的多个记录轨道上。 旋转圆筒的磁头扫描记录的磁道以再现数字信息信号。 再现装置具有标准重放模式，其中以标准速度和快速重放模式操作以再现速度比标准速度更高的速度再现。 再现装置中的跟踪控制控制磁带的速度，使得在快速重放模式中，磁头精确地跟踪特定区域的特定区域，该特定区域具有记录的快速重放模式的数据。 每个轨道被分成多个块。 每个块在其中记录了数字信息信号和由用于指示对应的轨道的轨道号和用于指示相应块的块号形成的识别信号。 每个轨道上的块的至少一个特定块具有为快速重放模式记录的数字信息信号。 特定块以这样的方式分散地布置在多个轨道上，使得在快速重放模式中，磁头沿着其在磁带上的扫描路径扫描特定块。

    Disk reproducing apparatus capable of increasing speed of access to disks recorded at constant linear velocity
    17.
    发明授权
    Disk reproducing apparatus capable of increasing speed of access to disks recorded at constant linear velocity 失效
    能够提高以恒定线速度记录的光盘访问速度的磁盘重放装置

    公开(公告)号：US5528574A

    公开(公告)日：1996-06-18

    申请号：US357978

    申请日：1994-12-16

    申请人： Toshifumi Takeuchi ,  Shigeki Inoue ,  Akio Fukushima ,  Takao Arai ,  Yutaka Nagai

    发明人： Toshifumi Takeuchi ,  Shigeki Inoue ,  Akio Fukushima ,  Takao Arai ,  Yutaka Nagai

    IPC分类号： G11B7/005 ,  G11B19/02 ,  G11B19/247 ,  G11B19/28 ,  G11B20/10 ,  G11B7/00

    CPC分类号： G11B19/247 ,  G11B19/02 ,  G11B19/28 ,  G11B20/10 ,  G11B7/005

    摘要： An optical disk reproducing apparatus for reproducing at a high access-speed an optical disk on which data has been recorded at a constant linear velocity (CLV) includes a control circuit for controlling reading of the disk recorded at a CLV to be rotated at a constant angular velocity (CAV), and a processor for changing the frequency of a reference clock to determine the processing timing of the reproduced digital signal in accordance with a transmission speed of the digital information signal picked up from the disk. A motor for driving the disk can be rotated at a constant revolution rate upon access to the disk, and thus it is possible to remove one of the factors for determining the access time in the conventional CLV type reproduction system, or the time for controlling the motor to rotate for a constant linear velocity in accordance with the position of the optical pickup.

    摘要翻译： 一种用于以高速存取速度再现数据以恒定线速度（CLV）记录的光盘的光盘重放装置包括控制电路，该控制电路用于控制在CLV处记录的磁盘的读数以使其以恒定的速度旋转 角速度（CAV）和用于改变参考时钟的频率的处理器，以根据从盘拾取的数字信息信号的传输速度确定再现的数字信号的处理定时。 用于驱动盘的电动机可以在进入盘时以恒定的转速旋转，因此可以去除用于确定常规CLV类型再现系统中的存取时间的因素之一，或者控制该时间 电机根据光学拾取器的位置旋转恒定的线速度。

    Magnetic recording and reproducing device
    18.
    发明授权
    Magnetic recording and reproducing device 失效
    磁记录和再现装置

    公开(公告)号：US5414567A

    公开(公告)日：1995-05-09

    申请号：US625822

    申请日：1990-12-11

    申请人： Nobutaka Amada ,  Toshifumi Takeuchi ,  Akira Abeta ,  Takao Arai ,  Kouei Usuda

    发明人： Nobutaka Amada ,  Toshifumi Takeuchi ,  Akira Abeta ,  Takao Arai ,  Kouei Usuda

    IPC分类号： G11B5/02 ,  G11B20/10 ,  H04N5/782 ,  H04N9/802 ,  H04N9/835 ,  H04N5/78

    CPC分类号： H04N9/835 ,  G11B20/10 ,  H04N5/78213 ,  H04N9/802

    摘要： A magnetic recording method and apparatus which performs a quadrature phase shift keying operation on a digital information signal, superimposes a high frequency bias signal on the performed signal, records the resulting signal into a deep portion of a magnetic layer of a magnetic tape with a first rotational head, and records a video signal in a surface portion of the magnetic layer above a track formed by the former recording, with a second rotational head which is different in azimuth angle from the first rotational head, the frequency of the high frequency bias signal being set to a value which is about four times as high as the carrier frequency of the quadrature phase shift keyed digital information signal, thereby eliminating a 5th-order distortion component due to cross modulation of the high frequency bias signal and the carrier frequency.

    摘要翻译： 对数字信息信号执行正交相移键控操作的磁记录方法和装置，在所执行的信号上叠加高频偏置信号，将所得到的信号记录在磁带的磁性层的深部，第一 旋转头，并且利用与第一旋转头的方位角不同的第二旋转头将磁性层的表面部分中的视频信号记录在由前一记录形成的轨道上，高频偏置信号的频率 被设置为正交相移键控数字信息信号的载波频率的约四倍的值，从而消除由于高频偏置信号和载波频率的交叉调制引起的5阶失真分量。

    Offset compensation circuit
    19.
    发明授权
    Offset compensation circuit 失效
    偏移补偿电路

    公开(公告)号：US4965867A

    公开(公告)日：1990-10-23

    申请号：US234874

    申请日：1988-08-22

    申请人： Masami Tsuchida ,  Ichiro Miyake ,  Tokihiro Takahashi ,  Shinichi Wakumura ,  Yoshimi Iso ,  Takao Arai ,  Hiroo Okamoto

    发明人： Masami Tsuchida ,  Ichiro Miyake ,  Tokihiro Takahashi ,  Shinichi Wakumura ,  Yoshimi Iso ,  Takao Arai ,  Hiroo Okamoto

    IPC分类号： H03M1/02 ,  H03M1/06 ,  H03M1/10 ,  H04L25/06

    CPC分类号： H03M1/1023 ,  H03M1/0607 ,  H04L25/067 ,  H03M1/02

    摘要： An offset compensation circuit for compensating a DC offset which occurs in a circuit line including an A/D converter or an A/D and D/A converter in which not only the polarity bit of digital data but also information concerning the amplitude of an analog input signal are applied to an integrator to precisely compensate an offset voltage in a circuit line. The level of a proper offset compensation voltage is provided even when an input analog signal such as a music signal is absent, and when an A/D and D/A converter is provided which can perform both A/D conversion and D/A conversion the DC offset can be precisely compensated shortly after the change of the mode from D/A conversion to A/D conversion.

    摘要翻译： 一种偏移补偿电路，用于补偿在包括A / D转换器或A / D和D / A转换器的电路线中发生的DC偏移，其中不仅数字数据的极性位，而且还涉及与模拟 输入信号被施加到积分器以精确地补偿电路线路中的偏移电压。 即使没有诸如音乐信号的输入模拟信号，并且当提供可以执行A / D转换和D / A转换的A / D和D / A转换器时，也提供适当的偏移补偿电压的电平 在将模式从D / A转换改变为A / D转换之后，DC偏移可以很快精确地补偿。

    Apparatus for recording/reproducing a digital signal at variable speeds
    20.
    发明授权
    Apparatus for recording/reproducing a digital signal at variable speeds 失效
    用于以可变速度记录/再现数字信号的装置

    公开(公告)号：US4942487A

    公开(公告)日：1990-07-17

    申请号：US157795

    申请日：1988-02-19

    申请人： Takaharu Noguchi ,  Takao Arai

    发明人： Takaharu Noguchi ,  Takao Arai

    IPC分类号： G11B5/09 ,  G11B15/18 ,  G11B15/467 ,  G11B27/00

    CPC分类号： G11B27/005 ,  G11B15/1875 ,  G11B15/4678

    摘要： A digital signal recording/reproducing apparatus for enabling recording/reproduction at variable speeds including normal speed, and at least one of N-times normal speed and 1/N-times normal speed while maintaining the reproducing frequency constant so as to not require switching of analog circuits. At the time of reproduction at normal speed, N-times normal speed or 1/N-times normal speed, the feed speed of the magnetic tape and the timing of picking up of a reproducing signal from the magnetic tape are varied while the speed of revolution of a cylinder of a rotary head is maintained constant so that the timing of detection of pilot signals for generating a tracking error signal is varied to cope with difference in track scanning conditions in recording and reproducing modes.

    摘要翻译： 一种数字信号记录/再现装置，用于在保持再现频率恒定的同时能够以包括正常速度在内的可变速度和N倍正常速度和1 / N倍正常速度中的至少一个进行记录/再现，从而不需要切换 模拟电路。 在正常速度再现N倍正常速度或正常速度的1 / N倍时，磁带的进给速度和从磁带拾取再现信号的定时被改变，而速度 旋转磁头的气缸的旋转保持恒定，使得用于产生跟踪误差信号的导频信号的检测定时被改变以应对记录和再现模式中的磁道扫描条件的差异。