公开(公告)号：US06452879B1

公开(公告)日：2002-09-17

申请号：US09772155

申请日：2001-01-29

申请人： Wataru Tsukahara ,  Shigenori Yanagi ,  Toru Ikeda ,  Masatsugu Nishida

发明人： Wataru Tsukahara ,  Shigenori Yanagi ,  Toru Ikeda ,  Masatsugu Nishida

IPC分类号： G11B700

CPC分类号： G11B7/094

摘要： An offset measuring unit receives a servo error signal E1 in which a change in an offset caused by a change in an amount of reflection light directly appears and which does not pass through a filter, and measures an offset amount in the servo error signal which is caused by a change in the amount of reflection light. A correction amount calculating unit calculates a correction amount to cancel out the offset amount and outputs the correction amount to an offset correcting circuit for an offset generating period so as to perform correction.

公开(公告)号：US06249496B1

公开(公告)日：2001-06-19

申请号：US09196098

申请日：1998-11-19

申请人： Wataru Tsukahara ,  Shigenori Yanagi ,  Toru Ikeda

发明人： Wataru Tsukahara ,  Shigenori Yanagi ,  Toru Ikeda

IPC分类号： G11B709

CPC分类号： G11B7/0901 ,  G11B7/08517 ,  G11B7/094 ,  G11B7/0941 ,  G11B11/10576 ,  G11B11/10597

摘要： A correction processing unit for correcting a level fluctuation appearing on a tracking error signal when a laser beam passes an ID area on a medium track during an on-track control is provided. That is, in the correction processing unit, a correction value determined by a correction value determining unit at a correction timing detected by a correction timing discriminating unit is subtracted by a correcting unit from a signal value obtained by sampling and converting the tracking error signal into digital data by an A/D converter at a predetermined period and reading, thereby performing the correction.

摘要翻译： 提供了一种校正处理单元，用于当在轨道控制期间激光束通过介质轨道上的ID区域时，校正出现在跟踪误差信号上的电平波动。 也就是说，在校正处理单元中，通过校正单元从由校正定时识别单元检测的校正定时由校正值确定单元确定的校正值从通过采样获得的信号值中减去，并将跟踪误差信号转换为 通过A / D转换器以预定周期进行数字数据读取，从而进行校正。

公开(公告)号：US06504802B1

公开(公告)日：2003-01-07

申请号：US09349029

申请日：1999-07-07

申请人： Wataru Tsukahara ,  Shigenori Yanagi

发明人： Wataru Tsukahara ,  Shigenori Yanagi

IPC分类号： G11B700

CPC分类号： G11B7/0901

摘要： A tracking control method carries out a tracking control based on a tracking error signal which indicates an error of a beam spot formed on a recording medium by a light beam from a light source with respect to a track. The tracking control method includes detecting a change in a light emission power of the light source, calculating a correction quantity which is used to correct a shift and/or fluctuation of the tracking error signal generated due to the change in the light emission power, and carrying out a correction by adding the correction quantity to the tracking error signal when the change in the light emission power is detected.

摘要翻译： 跟踪控制方法基于跟踪误差信号执行跟踪控制，所述跟踪误差信号指示由相对于​​轨道的光源的光束在记录介质上形成的束斑的误差。 跟踪控制方法包括检测光源的发光功率的变化，计算用于校正由于发光功率的变化而产生的跟踪误差信号的偏移和/或波动的校正量，以及 当检测到发光功率的变化时，通过将跟踪误差信号加上校正量来进行校正。

公开(公告)号：US06628581B1

公开(公告)日：2003-09-30

申请号：US09550894

申请日：2000-04-17

申请人： Wataru Tsukahara ,  Shigenori Yanagi

发明人： Wataru Tsukahara ,  Shigenori Yanagi

IPC分类号： G11B700

CPC分类号： G11B7/0901 ,  G11B7/0908 ,  G11B7/0941 ,  G11B11/10576

摘要： This invention relates to a servo-control method and servo-controller of a memory storage device, as well as the memory storage device, for positioning the reading position of a head on a target position. It suppresses phase lag in the high region while preventing a decrease in follow-ability. This invention comprises a storage medium 72, head 76, actuator 60, detection circuit 48, and control circuit 16. The detection circuit 48 detects the amount of shift between the reading position of the head 76 and a target position. The control circuit 16 performs PID calculation for the shift amount and outputs an instruction value for the actuator 60. There is a limiter 121 for limiting the calculated result of the differential component of this PID calculation to a specified value. Only the high region is limited and the low region is not limited, thus it is possible to suppress phase lag in the high while maintaining follow-ability.

摘要翻译： 本发明涉及存储器存储装置的伺服控制方法和伺服控制器，以及用于将头部的读取位置定位在目标位置上的存储器存储装置。 在高区域抑制相位滞后，同时防止后续能力下降。 本发明包括存储介质72，头76，致动器60，检测电路48和控制电路16.检测电路48检测头部76的读取位置与目标位置之间的偏移量。 控制电路16对移动量执行PID计算，并输出致动器60的指令值。存在限制器121，用于将该PID计算的差分分量的计算结果限制为指定值。 只有高区域是有限的，低区域不受限制，因此可以在保持跟踪性的同时抑制高的相位滞后。

公开(公告)号：US06845065B2

公开(公告)日：2005-01-18

申请号：US09956066

申请日：2001-09-19

申请人： Wataru Tsukahara ,  Shigenori Yanagi

发明人： Wataru Tsukahara ,  Shigenori Yanagi

IPC分类号： G11B11/105 ,  G11B5/02 ,  G11B5/56 ,  G11B7/00 ,  G11B7/12 ,  G11B11/00 ,  G11B21/02

CPC分类号： G11B11/10595 ,  G11B11/10502 ,  G11B11/10563

摘要： A magneto-optical recording medium processing apparatus of the present invention limits, via a predetermined current limiting means, the bias current applied to a bias coil during seek, when a seek current is applied to a carriage. In accordance therewith, it is possible to reduce the peak of the sum current, which is the total of the seek current and the bias current, and the current consumption of the entire apparatus can also be curbed. Current limiting means, for example, sets a bias current that is smaller than the specified value of the bias current required at media access time, and sets a bias current value such that the total of the seek current and bias current does not exceed an allowable current.

摘要翻译： 本发明的磁光记录介质处理装置通过预定电流限制装置限制在寻道期间施加到偏置线圈的偏置电流，当向载架施加寻道电流时。 因此，可以减小作为寻找电流和偏置电流的总和的和电流的峰值，并且还可以抑制整个装置的电流消耗。 例如，限流装置设定小于介质存取时间所需的偏置电流的规定值的偏置电流，并设定偏置电流值，使得寻道电流和偏置电流的总和不超过允许值 当前。