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公开(公告)号：US5631891A
公开(公告)日：1997-05-20
申请号：US332568
申请日：1994-10-31
CPC分类号： G11B13/04 , G11B20/10009 , G11B7/005
摘要： Disclosed is an optical disk apparatus having a zero-cross signal generating unit for differentiating a reproduced signal read from an optical disk and outputting a zero-cross signal when the differentiated signal crosses the zero level, and a gate signal generating unit for generating a gate signal using the reproduced signal, wherein a data pulse is outputted when the zero-cross signal is generated while the gate signal is being produced. A clamping circuit clamps the peak of a reproduced signal from an optical disk, an amplitude comparator compares the amplitude of a clamped signal, which is outputted by the clamping circuit, with a reference voltage, and an AGC control unit controls the gain of a variable-gain amplifier by generating a control voltage signal in dependence upon an amplitude difference. The gate signal generating unit generates the gate signal upon comparing the clamped signal outputted by the clamping circuit with a prescribed signal level. A data-pulse output unit outputs the data pulse when the zero-cross signal of the differentiated reproduced signal is generated while the gate signal is being produced.
摘要翻译： 公开了一种具有零交叉信号产生单元的光盘装置，用于对从光盘读出的再现信号进行微分，并且当微分信号越过零电平时输出零交叉信号;门信号产生单元，用于产生门 信号，其中当产生栅极信号时产生过零信号时输出数据脉冲。 钳位电路将来自光盘的再现信号的峰值钳位，幅度比较器将由钳位电路输出的钳位信号的幅度与参考电压进行比较，并且AGC控制单元控制变量的增益 - 通过根据幅度差产生控制电压信号。 门信号发生单元在将钳位电路输出的钳位信号与规定的信号电平进行比较时，生成栅极信号。 当产生栅极信号时，产生微分再生信号的零交叉信号时，数据脉冲输出单元输出数据脉冲。
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2.发明授权Optical disk apparatus and recording and reproducing method of optical recording medium 失效光盘装置以及光记录介质的记录和再现方法
公开(公告)号：US5796704A
公开(公告)日：1998-08-18
申请号：US530705
申请日：1995-09-19
IPC分类号： G11B11/10 , G11B7/00 , G11B7/004 , G11B7/125 , G11B11/105
CPC分类号： G11B19/046 , G11B11/10595 , G11B7/126 , G11B11/10515
摘要： A magnetooptic recording medium having a writing layer and a readout layer on a substrate is used. Data is recorded in the writing layer of the magnetooptic recording medium at a recording density smaller than a diameter of a focal spot of a laser beam. The data recorded in the writing layer of the magnetooptic recording medium at the recording density smaller than the beam diameter is reproduced by setting a reproducing laser power to a proper value. A reproduction laser power calibrating module executes the reproducing operation for calibration of the magnetooptic recording medium, thereby deciding the optimum value of the laser power which is used upon reproduction. For example, the reproduction laser power calibrating module measures a change in reproduction signal while raising the reproducing laser power by using a predetermined minimum reproducing laser power W0 as an initial value and a value obtained by adding a predetermined value Wc to the reproducing laser power (W) when the reproduction signal doesn't change to the optimum reproducing laser power.
摘要翻译： 使用在基板上具有写入层和读出层的磁光记录介质。 数据以小于激光束的焦点直径的记录密度记录在磁光记录介质的写入层中。 通过将再现激光功率设置为适当值来再现以小于光束直径的记录密度记录在磁光记录介质的写入层中的数据。 复制激光功率校准模块执行用于校准磁光记录介质的再现操作，从而确定再现时使用的激光功率的最佳值。 例如，再现激光功率校准模块通过使用预定的最小再现激光功率W0作为初始值和通过将预定值Wc加到再现激光功率而获得的值来测量再现信号的变化，同时提高再现激光功率 W），当再现信号不改变为最佳再现激光功率时。
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公开(公告)号：US07142485B2
公开(公告)日：2006-11-28
申请号：US11205222
申请日：2005-08-16
IPC分类号： G11B7/00
CPC分类号： G11B7/08541 , G11B7/0901
摘要： The present invention provides an information storage apparatus that generates a tracking error signal based on a detection signal, and performs various control operations based on the tracking error signal. When the operation mode is a seek operation mode, the information storage apparatus generates a tracking error signal by holding the peak value of the detection signal. When the operation mode is a tracking operation mode, the information storage apparatus generates a tracking error signal directly from the detection signal. With this information storage apparatus, stable control operations can be performed, regardless of changes of conditions.
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公开(公告)号：US20060007805A1
公开(公告)日：2006-01-12
申请号：US11205222
申请日：2005-08-16
IPC分类号： G11B7/00
CPC分类号： G11B7/08541 , G11B7/0901
摘要： The present invention provides an information storage apparatus that generates a tracking error signal based on a detection signal, and performs various control operations based on the tracking error signal. When the operation mode is a seek operation mode, the information storage apparatus generates a tracking error signal by holding the peak value of the detection signal. When the operation mode is a tracking operation mode, the information storage apparatus generates a tracking error signal directly from the detection signal. With this information storage apparatus, stable control operations can be performed, regardless of changes of conditions.
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5.发明授权Optical medium recording method and apparatus employing pulse width delay and/or advancement 失效采用脉宽延迟和/或提前的光介质记录方法和装置
公开(公告)号：US5347505A
公开(公告)日：1994-09-13
申请号：US4865
申请日：1993-01-19
IPC分类号： G11B7/0045 , G11B7/013 , G11B7/125 , G11B11/105 , G11B20/10 , G11B27/36 , H04N5/76
CPC分类号： G11B7/126 , G11B11/10504 , G11B11/1053 , G11B20/10194 , G11B27/36 , G11B7/0045 , G11B7/24085
摘要： A method and apparatus for optical recording addresses a problem of edge shift which occurs during the recording. The apparatus includes a rotating mechanism for rotating an optical medium, and an optical head having a light source for recording information on the optical medium. A moving mechanism moves the optical head to a predetermined position on the optical medium, and a recording controlling device controls light source of the optical head in accordance with a recording pulse. The recording controlling device includes a pulse width measuring device for measuring the pulse width of a recording pulse, and fall controlling device effects a recording compensation by advancing a fall of the recording pulse with a lead, such that the lead increases with the measured pulse width. A pulse interval measuring device is provided for measuring a pulse interval preceding the recording pulse, and a rise controlling device effects a recording compensation by delaying a rise of the recording pulse with a delay, such that the delay decreases with the measured pulse interval.
摘要翻译： 用于光学记录的方法和装置解决了在记录期间发生的边缘偏移的问题。 该装置包括用于旋转光学介质的旋转机构和具有用于在光学介质上记录信息的光源的光学头。 移动机构将光头移动到光学介质上的预定位置，记录控制装置根据记录脉冲控制光头的光源。 记录控制装置包括用于测量记录脉冲的脉冲宽度的脉冲宽度测量装置，并且下降控制装置通过使用引线引起记录脉冲的下降来实现记录补偿，使得引线随测量的脉冲宽度而增加 。 提供脉冲间隔测量装置，用于测量记录脉冲之前的脉冲间隔，并且上升控制装置通过延迟记录脉冲的上升延迟来实现记录补偿，使得延迟随测量的脉冲间隔而减小。
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公开(公告)号：US20100061008A1
公开(公告)日：2010-03-11
申请号：US12505945
申请日：2009-07-20
IPC分类号： G11B19/02
CPC分类号： G11B19/02
摘要： A magnetic disk drive includes a switching regulator configured to generate an output voltage, and a magnetic disk control unit that receives the output voltage as a power supply and performs data write and read operations on a magnetic recording medium. The switching regulator includes a voltage conversion part configured to generate a second voltage by switching a first voltage, a smoothing part configured to smooth the second voltage to thus produce an output voltage, a control part configured to control the switching on the basis of a difference between the output voltage and a reference voltage to thus stabilize the output voltage, and a reference voltage changing part configured to change the reference voltage in accordance with an operation mode of the magnetic disk control unit.
摘要翻译： 磁盘驱动器包括被配置为产生输出电压的开关调节器和接收作为电源的输出电压并对磁记录介质执行数据写入和读取操作的磁盘控制单元。 开关调节器包括：电压转换部，被配置为通过切换第一电压产生第二电压;平滑部，被配置为使第二电压平滑，从而产生输出电压;控制部，被配置为基于差异来控制开关 在输出电压和参考电压之间，使输出电压稳定，以及参考电压变化部，其被配置为根据磁盘控制单元的操作模式改变参考电压。
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公开(公告)号：US6115350A
公开(公告)日：2000-09-05
申请号：US250114
申请日：1999-02-16
IPC分类号： G11B7/00 , G11B7/0045 , G11B7/005 , G11B7/007 , G11B7/013 , G11B7/125 , G11B11/105 , G11B20/10 , G11B20/18 , H03M13/03
CPC分类号： G11B7/00736 , G11B20/10 , G11B20/1866 , G11B7/0045 , G11B7/005 , G11B7/007 , G11B7/126 , H03M13/03 , G11B11/10515 , G11B11/1053 , G11B11/10595 , G11B7/24085
摘要： An optical disk apparatus adapted to a mark edge recording method having a structure such that a data pattern experimentally recorded on an optical disk with one write power is reproduced plural times while changing reproducing conditions (for example, a slice level for binary-coding a reproduced analog signal) and the number of errors is calculated whenever the reproducing process is performed. The thus-structured process is repeated for using a plurality of write powers. An appropriate write power for the optical disk is determined in accordance with the obtained results of the calculations of the number of errors. In a case of a read-only optical disk, a data pattern experimentally and previously recorded on the optical disk is reproduced plural times by changing the reproducing conditions (for example, a slice level for binary-coding a reproduced analog signal), and the number of errors is calculated whenever the reproducing process is performed. In accordance with the obtained results of the calculations of the number of errors, an appropriate reproducing condition for the optical disk is determined.
摘要翻译： 一种适于具有标记边缘记录方法的光盘装置，其特征在于，在改变再现条件（例如，用于对再现的二进制编码的二进制编码的限幅电平）的条件下，再现多次复制多个具有一个写入功率的实际记录在光盘上的数据模式 模拟信号），并且每当执行再现处理时就计算出错误的数量。 为了使用多个写入功率重复这样构造的处理。 根据获得的误差数的计算结果确定光盘的适当写入功率。 在只读光盘的情况下，通过改变再现条件（例如，用于对再现的模拟信号进行二进制编码的限幅电平）来再现多次实验并预先记录在光盘上的数据模式，并且 每当执行再现处理时就计算出错误的数量。 根据获得的错误数的计算结果，确定光盘的合适的再现条件。
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公开(公告)号：US5920534A
公开(公告)日：1999-07-06
申请号：US44608
申请日：1998-03-19
IPC分类号： G11B7/00 , G11B7/0045 , G11B7/005 , G11B7/007 , G11B7/013 , G11B7/125 , G11B11/105 , G11B20/10 , G11B20/18 , H03M13/03
CPC分类号： G11B7/00736 , G11B20/10 , G11B20/1866 , G11B7/0045 , G11B7/005 , G11B7/007 , G11B7/126 , H03M13/03 , G11B11/10515 , G11B11/1053 , G11B11/10595 , G11B7/24085
摘要： An optical disk apparatus adapted to a mark edge recording method having a structure such that a data pattern experimentally recorded on an optical disk with one write power is reproduced plural times while changing reproducing conditions (for example, a slice level for binary-coding a reproduced analog signal) and the number of errors is calculated whenever the reproducing process is performed. The thus-structured process is repeated for using a plurality of write powers. An appropriate write power for the optical disk is determined in accordance with the obtained results of the calculations of the number of errors. In a case of a read-only optical disk, a data pattern experimentally and previously recorded on the optical disk is reproduced plural times by changing the reproducing conditions (for example, a slice level for binary-coding a reproduced analog signal), and the number of errors is calculated whenever the reproducing process is performed. In accordance with the obtained results of the calculations of the number of errors, an appropriate reproducing condition for the optical disk is determined.
摘要翻译： 一种适于具有标记边缘记录方法的光盘装置，其特征在于，在改变再现条件（例如，用于对再现的二进制编码的二进制编码的限幅电平）的条件下，再现多次复制多个具有一个写入功率的实际记录在光盘上的数据模式 模拟信号），并且每当执行再现处理时就计算出错误的数量。 为了使用多个写入功率重复这样构造的处理。 根据获得的误差数的计算结果确定光盘的适当写入功率。 在只读光盘的情况下，通过改变再现条件（例如，用于对再现的模拟信号进行二进制编码的限幅电平）来再现多次实验并预先记录在光盘上的数据模式，并且 每当执行再现处理时就计算出错误的数量。 根据获得的错误数的计算结果，确定光盘的合适的再现条件。
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公开(公告)号：US5777964A
公开(公告)日：1998-07-07
申请号：US745425
申请日：1996-11-12
IPC分类号： G11B7/00 , G11B7/0045 , G11B7/005 , G11B7/007 , G11B7/013 , G11B7/125 , G11B11/105 , G11B20/10 , G11B20/18 , H03M13/03
CPC分类号： G11B7/00736 , G11B20/10 , G11B20/1866 , G11B7/0045 , G11B7/005 , G11B7/007 , G11B7/126 , H03M13/03 , G11B11/10515 , G11B11/1053 , G11B11/10595 , G11B7/24085
摘要： An optical disk apparatus adapted to a mark edge recording method having a structure such that a data pattern experimentally recorded on an optical disk with one write power is reproduced plural times while changing reproducing conditions (for example, a slice level for binary-coding a reproduced analog signal) and the number of errors is calculated whenever the reproducing process is performed. The thus-structured process is repeated for using a plurality of write powers. An appropriate write power for the optical disk is determined in accordance with the obtained results of the calculations of the number of errors. In a case of a read-only optical disk, a data pattern experimentally and previously recorded on the optical disk is reproduced plural times by changing the reproducing conditions (for example, a slice level for binary-coding a reproduced analog signal), and the number of errors is calculated whenever the reproducing process is performed. In accordance with the obtained results of the calculations of the number of errors, an appropriate reproducing condition for the optical disk is determined.
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公开(公告)号：US07009918B2
公开(公告)日：2006-03-07
申请号：US09791397
申请日：2001-02-22
IPC分类号： G11B7/00
CPC分类号： G11B7/08541 , G11B7/0901
摘要： The present invention provides an information storage apparatus that generates a tracking error signal based on a detection signal, and performs various control operations based on the tracking error signal. When the operation mode is a seek operation mode, the information storage apparatus generates a tracking error signal by holding the peak value of the detection signal. When the operation mode is a tracking operation mode, the information storage apparatus generates a tracking error signal directly from the detection signal. With this information storage apparatus, stable control operations can be performed, regardless of changes of conditions.
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