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    • 5. 发明授权
    • Rotating head type reproducing apparatus
    • 旋转头型重放装置
    • US4665449A
    • 1987-05-12
    • US643301
    • 1984-08-22
    • Susumu KozukiNobutoshi TakayamaHiroo EdakuboTatsuzo UshiroMasahiro TakeiKenichi Nagasawa
    • Susumu KozukiNobutoshi TakayamaHiroo EdakuboTatsuzo UshiroMasahiro TakeiKenichi Nagasawa
    • G11B5/592G11B15/467G11B21/10G11B5/56
    • G11B5/592G11B15/4678G11B21/103
    • A rotating head type reproducing apparatus, arranged to reproduce a recorded signal by tracing, one after another many recording tracks formed on a record bearing medium at a predetermined pitch by a rotating head, includes a moving mechanism for moving the record bearing medium in a direction transverse to the recording tracks; a shifting mechanism for shifting the rotating head in a direction transverse to the rotating plane thereof; a pulse signal generator for generating a pulse signal in association with the moving operation of the moving mechanism on the record bearing medium; a counter for counting the pulse signal, the count datum of the counter being arranged to return to the initial datum every time a predetermined number of pulses of the pulse signal are counted; a timing signal generator for generating a timing signal in association with the rotation of the rotating head; and a control device for forming a control signal for controlling the shifting mechanism on the basis of the count data of the counter and the timing signal.
    • 旋转磁头型重放装置,用于通过跟踪再现记录信号,通过旋转磁头以预定的间距一个接一个地在记录轴承介质上形成的许多记录磁道包括一个移动机构,用于沿记录轴承介质的方向 横向记录轨道; 用于使旋转头沿与其旋转平面横切的方向移动的移动机构; 脉冲信号发生器,用于与记录承载介质上的移动机构的移动操作相关联地产生脉冲信号; 计数器,用于对脉冲信号进行计数,计数器的计数基准被布置为每当计数脉冲信号的预定数量的脉冲时返回到初始数据; 定时信号发生器,用于与旋转头的旋转相关联地产生定时信号; 以及控制装置,用于基于计数器的计数数据和定时信号形成用于控制换档机构的控制信号。
    • 8. 发明授权
    • Rotary head type reproducing apparatus having a head shifter for
accurately shifting the rotary head
    • 具有用于精确地移动旋转头的头移位器的旋转头型重放装置
    • US4780774A
    • 1988-10-25
    • US652762
    • 1984-09-20
    • Hiroo EdakuboTatsuzo UshiroNobutoshi TakayamaHiroyuki Takimoto
    • Hiroo EdakuboTatsuzo UshiroNobutoshi TakayamaHiroyuki Takimoto
    • G11B5/588G11B15/18G11B5/592
    • G11B15/1875G11B5/588
    • A rotary type reproducing apparatus for reproducing a recorded signal through the tracing of many recording tracks formed at a predetermined pitch on a record bearing medium, one after another, includes a moving apparatus for moving the record bearing medium in a direction which crosses the recording tracks; a shifting apparatus for shifting the rotary head in a direction which crosses the rotation plane thereof; an apparatus for forming a first pulse signal in association with the record bearing meduim moving action of the moving apparatus; an apparatus for forming, on the basis of the first pulse signal, a second pulse signal which is of a higher frequency than the first pulse signal; a counting apparatus for counting the pulses of the second pulse signal; and a control apparatus for forming, on the basis of the counter value of the counting apparatus, a control signal which controls the shifting apparatus. Arranged as such, the shifting apparatus shifts the rotary head using a control signal which is in close proximity to an ideally analogously varying control signal, so that the recording tracks on the medium may be accurately traced.
    • 一种用于通过跟踪在记录载体介质上以预定间距形成的许多记录轨迹来再现记录信号的旋转式再现装置,包括:移动装置,用于使记录载体介质沿与记录轨迹交叉的方向移动; ; 移动装置,用于沿与其旋转平面相交的方向移动旋转头; 与移动装置的记录载体移动动作相关联地形成第一脉冲信号的装置; 基于第一脉冲信号形成比第一脉冲信号高的第二脉冲信号的装置; 计数装置,用于对第二脉冲信号的脉冲进行计数; 以及控制装置,用于根据计数装置的计数值形成控制变速装置的控制信号。 这样安排,换档装置使用与理想类似变化的控制信号相近的控制信号来移动旋转磁头,从而可以精确地跟踪介质上的记录轨道。