公开(公告)号：US4393422A

公开(公告)日：1983-07-12

申请号：US250296

申请日：1981-04-02

申请人： Nobuyoshi Yokobori ,  Masashi Urayama ,  Hiroshi Okamoto ,  Yoshiaki Igarashi

发明人： Nobuyoshi Yokobori ,  Masashi Urayama ,  Hiroshi Okamoto ,  Yoshiaki Igarashi

IPC分类号： H02P3/00 ,  G11B15/18 ,  G11B15/20 ,  G11B15/467 ,  G11B15/48 ,  H02P29/00 ,  G11B15/52 ,  G11B19/28

CPC分类号： G11B15/20 ,  G11B15/467 ,  G11B15/48

摘要： A device for intermittently driving a magnetic tape has a capstan for driving the magnetic tape, a motor directly connected to the capstan for driving the capstan, a tachometer for detecting the rotating speed of the motor and producing an output, and a speed control having a settable speed controller for setting a desired motor speed and into which the output from the tachometer is fed back for enabling the speed control to sense when the motor is rotating at the desired motor speed. An intermittent drive control is provided for supplying a triggering signal to trigger said settable speed controller to cause the settable speed controller to operate the speed control for accelerating the motor to the desired motor speed and driving it at that speed, the intermittent drive control supplying the triggering signal in response to a speed setting signal and a head switch signal. A detector for detecting a control signal recorded on the magnetic tape while the motor is being driven at the desired speed is connected to the intermittent drive control. The intermittent drive control is further responsive to the detection of the control signal for discontinuing the triggering signal after the passage of a predetermined period of time for causing the settable speed controller to decelerate the driving of the motor from the desired motor speed, whereby the position of the magnetic tape relative to the position of the recorded control signal at the end of the deceleration by the speed control is constant.

摘要翻译： 用于间歇地驱动磁带的装置具有用于驱动磁带的绞盘，直接连接到主导轴用于驱动主导轴的马达，用于检测马达的转速并产生输出的转速计，以及具有 可设定的速度控制器，用于设定所需的电机速度，反馈器的输出反馈到该速度控制器中，以使速度控制能够感测电机何时以所需的电机速度旋转。 提供间歇驱动控制，用于提供触发信号以触发所述可设定速度控制器，以使可设定速度控制器操作用于将电动机加速到期望的电动机速度并以该速度驱动的速度控制，间歇驱动控制提供 响应于速度设置信号和头开关信号的触发信号。 用于检测在以正常速度驱动电动机时记录在磁带上的控制信号的检测器被连接到间歇驱动控制。 间歇驱动控制还响应于在经过预定时间段之后停止触发信号的控制信号的检测，以使可设定速度控制器从所需电机速度减速马达的驱动，由此位置 的磁带相对于通过速度控制的减速结束时记录的控制信号的位置是恒定的。

公开(公告)号：US4484235A

公开(公告)日：1984-11-20

申请号：US275027

申请日：1981-06-18

申请人： Nobuyoshi Yokobori ,  Masashi Urayama ,  Yoshiaki Igarashi

发明人： Nobuyoshi Yokobori ,  Masashi Urayama ,  Yoshiaki Igarashi

IPC分类号： G11B15/18 ,  G11B15/473 ,  H02P23/00 ,  G11B21/10 ,  H04N5/76

CPC分类号： G11B15/1875 ,  G11B15/4731 ,  H02P23/186 ,  Y10S388/911 ,  Y10S388/912

摘要： A phase control circuit for improving the stability after a predictable rotational speed change of a rotating apparatus and a magnetic reproducing apparatus for performing slow motion reproduction by means of intermittent tape transport and yet being free from transverse swings of the reproduced picture comprises a phase shift circuit which shifts the phase of the reference signal, which is produced by dividing a source signal, at a desired rate, to maintain the phase locked at the very moment during which the rotational speed change is changing. The relative speed of the magnetic head rotation is kept constant during the intermittent tape movement under the condition of the phase being locked.

摘要翻译： 用于改善旋转装置的可预测的转速变化之后的稳定性的相位控制电路和用于通过间歇磁带传送执行慢动作再现并且没有再现图像的横向摆动的磁再现装置包括相移电路 其以期望的速率偏移由源信号分压产生的参考信号的相位，以保持相位锁定在转速变化的时刻。 在相位被锁定的状态下，磁头旋转的相对速度在间歇磁带移动期间保持恒定。