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    Data reading mechanism for disk apparatuses for reproducing data and serum information recorded on a recording medium by a multi-zone recording method
    1.
    发明授权
    Data reading mechanism for disk apparatuses for reproducing data and serum information recorded on a recording medium by a multi-zone recording method 失效
    用于通过多区记录方法再现记录在记录介质上的数据和血清信息的盘装置的数据读取机构

    公开(公告)号：US5452147A

    公开(公告)日：1995-09-19

    申请号：US124230

    申请日：1993-09-21

    申请人： Mitsunori Yamashita ,  Hiroshi Nakashima ,  Osamu Miyazaki

    发明人： Mitsunori Yamashita ,  Hiroshi Nakashima ,  Osamu Miyazaki

    IPC分类号： G11B5/09 ,  G11B5/596 ,  G11B15/12

    CPC分类号： G11B5/59622 ,  G11B15/12 ,  G11B5/09

    摘要： Each track on a recording medium 1 is divided into a plurality of sectors, each of which comprises a head positioning information area and a data area. Signals read out of the recording medium 1 undergo wave shaping by a low-pass filter 4 and a differentiating circuit 5. An index pulse generator 8 generates an index pulse indicating the reference position of each track on the basis of an index hole detected by a detector 7. A control circuit 20, on the basis of the index pulse, generates a control signal for distinguishing the head positioning information area and the data area from each other. The low-pass filter 4 and the differentiating circuit 5, each in accordance with a control signal, switch between their two frequency characteristics.

    摘要翻译： 记录介质1上的每个磁道被划分成多个扇区，每个扇区包括磁头定位信息区和数据区。 从记录介质1读出的信号通过低通滤波器4和微分电路5进行波形整形。索引脉冲发生器8基于由a检测的索引孔产生指示各轨道的基准位置的索引脉冲 检测器7.控制电路20基于索引脉冲产生用于将磁头定位信息区域和数据区域彼此区分开的控制信号。 低通滤波器4和微分电路5各自根据控制信号在它们的两个频率特性之间切换。