发明授权
US5343342A Magnetic recording and playback system with feedback control of a
movable transducer head
失效
磁记录和回放系统,具有可移动换能器头的反馈控制
- 专利标题: Magnetic recording and playback system with feedback control of a movable transducer head
- 专利标题(中): 磁记录和回放系统,具有可移动换能器头的反馈控制
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申请号: US672876申请日: 1991-03-20
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公开(公告)号: US5343342A公开(公告)日: 1994-08-30
- 发明人: Yuji Kanagawa , Masato Nagasawa , Eiji Yokoyama , Kimihide Nakatsu , Toshiharu Miyago
- 申请人: Yuji Kanagawa , Masato Nagasawa , Eiji Yokoyama , Kimihide Nakatsu , Toshiharu Miyago
- 申请人地址: JPX Tokyo
- 专利权人: Mitsubishi Denki Kabushiki Kaisha
- 当前专利权人: Mitsubishi Denki Kabushiki Kaisha
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX2-77575 19900327
- 主分类号: G11B5/588
- IPC分类号: G11B5/588 ; G11B21/02
摘要:
In a magnetic recording/playback system having a magnetic head drive device for moving a movable head disposed within and mounted to a rotating upper drum in parallel with the axis of the drum, and a fixed drum supporting the upper drum so that the upper drum can rotate, an AC magnetic field generator is disposed along the peripheral surfaces of the drums at a location at which the magnetic tape is not wrapped on the drums. The AC magnetic field generator applies an AC magnetic field to the movable head that varies in the direction of the axis of the drums. Information on the position of the movable head is detected in accordance with the detection signal of the AC magnetic field derived by the movable head and the position of the movable head is controlled by feeding the detected positional infromation back to the magnetic head driving device.
公开/授权文献
- US5680852A Bow string release with interchangeable heads 公开/授权日:1997-10-28