Reel drive motor control system for cassette/cartridge tape recorders
    1.
    发明授权
    Reel drive motor control system for cassette/cartridge tape recorders 失效
    卷盘驱动马达控制系统用于盒式磁带/磁带录音机

    公开(公告)号:US4213583A

    公开(公告)日:1980-07-22

    申请号:US928777

    申请日:1978-07-28

    CPC分类号: G11B15/093 G11B15/54

    摘要: A tape transport control system suitable for use in tape recording apparatus which utilizes supply and take-up reels onto which the tape is wound. The control system is coupled to both the supply and take-up reels so as to generate detection signals which represents the rotation of the reels. The circuitry utilizes the detection signals to determine the point at which each of the reels in nearing its end, and sends a control signal to the tape transport circuitry to stop the rotation of the reels.

    摘要翻译: 一种适用于磁带记录装置的磁带传送控制系统,该磁带记录装置利用卷绕磁带的磁带和磁带盘。 控制系统耦合到供电卷轴和卷取卷轴,以产生代表卷轴旋转的检测信号。 电路利用检测信号来确定每个卷轴接近其端部的点,并且向磁带传送电路发送控制信号以停止卷轴的旋转。

    Tape tension control for tape recording and/or reproducing system
    2.
    发明授权
    Tape tension control for tape recording and/or reproducing system 失效
    磁带记录和/或再现系统的磁带张力控制

    公开(公告)号:US4218639A

    公开(公告)日:1980-08-19

    申请号:US856045

    申请日:1977-11-30

    申请人: Isao Sanguu

    发明人: Isao Sanguu

    CPC分类号: H02P7/2825 G11B15/43

    摘要: A purely electrical tension control system utilizing the characteristics of a shunt motor coupled with the supply reel. In a recording or reproducing mode, the reel drive motor is forced to rotate in a direction opposite to its normal direction of rotation, thus producing a counter electromotive force and torque for rotation. The counter electromotive force is detected and employed to control the motor torque to thereby maintain a fixed tape tension.

    摘要翻译: 一种纯电力张力控制系统,其利用与供带盘耦合的分流马达的特性。 在记录或再现模式中,卷轴驱动电动机被迫沿与其正常旋转方向相反的方向旋转,从而产生用于旋转的反电动势和转矩。 检测并采用反电动势来控制电动机转矩,从而保持固定的带张力。

    Scan tracking apparatus for helical scan video tape recorder
    3.
    发明授权
    Scan tracking apparatus for helical scan video tape recorder 失效
    用于螺旋扫描录像机的扫描跟踪装置

    公开(公告)号:US4520410A

    公开(公告)日:1985-05-28

    申请号:US470667

    申请日:1983-02-28

    CPC分类号: G11B5/584 G11B5/588

    摘要: A scan tracking apparatus for a helical scan tape recorder, comprising a movable tape head (11), a detector (13) detecting the envelope of the tape signal to produce a reproduced signal, sampling means (15) for sampling the reproduced signal at fixed points of the helical scan, memory (17) for storing the reproduced signal and correction signals from different tracks of the helical scan, computation means (2) for computing a correction signal to return the tape head to the center of the track, a sawtooth generator (2, 4) for producing a signal related to the tape speed (v), and a head driving mechanism (9) for moving the tape head in response to the sawtooth and correction signals.

    摘要翻译: 一种用于螺旋扫描磁带录像机的扫描跟踪装置,包括可移动磁带头(11),检测磁带信号的包络以产生再现信号的检测器(13),用于对固定的再现信号进行采样的采样装置(15) 螺旋扫描的点,用于存储重放信号的存储器(17)和来自螺旋扫描的不同轨道的校正信号;计算装置(2),用于计算校正信号以将磁带头返回到轨道的中心;锯齿 用于产生与磁带速度(v)相关的信号的发生器(2,4)以及用于响应锯齿和校正信号移动磁带头的磁头驱动机构(9)。