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    • 5. 发明授权
    • Recorded data reproducing apparatus
    • 记录数据再现装置
    • US4794469A
    • 1988-12-27
    • US75964
    • 1987-07-21
    • Katsuhiko KaidaKenji Asai
    • Katsuhiko KaidaKenji Asai
    • G11B5/596G11B20/10G11B21/08G11B21/10G11B5/09G11B15/14
    • G11B20/10027G11B20/10G11B20/10009
    • A recorded data reproducing apparatus according to this invention comprises a data pulse generation section, a peak detection section and a control section. The data pulse generation section reads out data written on the cylinder of a recording medium on which a magnetic head is currently positioned. According to received gain data, the data pulse generation section amplifies a signal corresponding to the readout data, and selectively generates data pulse sequence based on the amplified signal. When the amplified signal corresponds to servo data, the peak detection section detects the peak value of the amplified signal. The control section determines whether or not the magnitude of the detected peak value is nearly equal to a predetermined value. If the determination is negative, the control section refers to a gain data table to determine a change amount of the gain data, and supplies the gain data updated based on the change amount of the data pulse generation section.
    • 根据本发明的记录数据再现装置包括数据脉冲产生部分,峰值检测部分和控制部分。 数据脉冲发生部分读出写入磁头当前位于其上的记录介质的气缸上的数据。 根据接收到的增益数据,数据脉冲发生部分放大对应于读出数据的信号,并根据放大信号有选择地产生数据脉冲序列。 当放大的信号对应于伺服数据时,峰值检测部分检测放大信号的峰值。 控制部确定检测到的峰值的大小是否几乎等于预定值。 如果确定为否定,则控制部分参考增益数据表来确定增益数据的变化量,并且提供基于数据脉冲发生部分的变化量更新的增益数据。
    • 7. 发明授权
    • Head position determination control apparatus of data
recording/reproducing apparatus in a data surface servo system
    • 数据表面伺服系统中的数据记录/再现装置的头位置确定控制装置
    • US5187620A
    • 1993-02-16
    • US472670
    • 1990-01-30
    • Yuichi NotakeKenji AsaiTomihisa Ogawa
    • Yuichi NotakeKenji AsaiTomihisa Ogawa
    • G11B5/596
    • G11B5/59627
    • In a composite servo system or a servo system using only a sector servo system, when a head switching mode is set during a read/write operation, a CPU checks whether the cylinder of a target track of a subsequent head after switching is the same as that of a target track of a preceding head. If the target tracks are located on the same cylinder, the CPU compares offset value data of a data surface corresponding to the head before switching with that of the head after switching. If an error, as a comparison result, falls within a predtermined allowable range, a read/write operation by the head after switching is continuously executed. The CPU generates correction data used for positional correction processing for positioning the head at the center of the target position of a hard disk and temporarily stores the correction data in a data memory. The CPU executes positional correction processing on the basis of the correction data stored in the data memory.
    • 在仅使用扇区伺服系统的复合伺服系统或伺服系统中,当在读/写操作期间设置磁头切换模式时,CPU检查切换后的后续磁头的目标磁道的磁道是否与 前一个头部的目标轨迹。 如果目标轨迹位于相同的圆柱体上,则CPU在切换之后将与切换前的头部相对应的数据表面的偏移值数据与切换后的头部的偏移值数据进行比较。 如果作为比较结果的错误落在预定的允许范围内,则切换后头部的读/写操作被连续执行。 CPU产生用于位置校正处理的校正数据,用于将头部定位在硬盘的目标位置的中心,并将校正数据临时存储在数据存储器中。 CPU基于存储在数据存储器中的校正数据执行位置校正处理。