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32 条记录 (耗时 0.04 秒)

    Optical drive error tracking method and apparatus
    1.
    发明授权
    Optical drive error tracking method and apparatus 有权
    光驱误差跟踪方法及装置

    公开(公告)号：US06233210B1

    公开(公告)日：2001-05-15

    申请号：US09169368

    申请日：1998-10-09

    申请人： David L. Schell

    发明人： David L. Schell

    IPC分类号： G11B713

    CPC分类号： G11B7/0901

    摘要： A method and apparatus provides an improved optical storage disk player. An improved method and apparatus for obtaining a tracking error signal for an optical disk player is disclosed which is general across the various data formats found in CD audio disks, CD-ROMs, and digital video disks. The present invention uses a photodetector with at least four active areas to sense the reflected laser beam. A differential amplitude tracking error signal is generated by comparing the signal strength in the different active areas.

    摘要翻译： 一种方法和装置提供一种改进的光存储盘播放器。 公开了一种用于获得光盘播放器的跟踪误差信号的改进方法和装置，其通常在CD音频盘，CD-ROM和数字视频盘中发现的各种数据格式之间。 本发明使用具有至少四个有源区域的光电检测器来感测反射的激光束。 通过比较不同有效区域中的信号强度来产生差分幅度跟踪误差信号。

    Track seeking apparatus and method using sampled information
    4.
    发明授权
    Track seeking apparatus and method using sampled information 失效
    追踪装置和使用采样信息的方法

    公开(公告)号：US4855977A

    公开(公告)日：1989-08-08

    申请号：US78264

    申请日：1987-07-27

    申请人： Kurt W. Getreuer ,  David L. Schell

    发明人： Kurt W. Getreuer ,  David L. Schell

    IPC分类号： G11B7/085 ,  G11B21/08

    CPC分类号： G11B7/08529 ,  G11B21/083

    摘要： A track seeking method is provided which relies on sampled seek information. No external sensors are employed and the seek information is intermittently stored along the tracks provided on the disk surface. In determining the actual velocity of the seek actuator, at least two methods for counting crossed tracks are utilized. Preferably, a 1/2-count method is used at lower seek velocities and a 16-count method is used at higher seek velocities. The 178 -count method involves the receipt of two counts for each track that is crossed, while the 16-count method involves counting every sixteen tracks that are crossed. The selection of the 1/2-count and the 16-count methods for counting tracks crossed results in a velocity gap region. The velocity gap region is a range of seek actuator velocities in which the servo loop is underdamped for the 16-count method and where folding occurs for the 1/2-count method. To overcome the underdamping and folding problems, various solutions have been devised. In one embodiment, the velocity profile is configured so that the gap region is crossed in a relatively short amount of time and the 16-count method is used in providing velocity feedback.

    Programmable bit ordering for serial port
    5.
    发明授权
    Programmable bit ordering for serial port 有权
    串行端口的可编程位序

    公开(公告)号：US06586968B1

    公开(公告)日：2003-07-01

    申请号：US10023742

    申请日：2001-12-19

    申请人： Steven A. Schauer ,  David L. Schell

    发明人： Steven A. Schauer ,  David L. Schell

    IPC分类号： H03K19175

    CPC分类号： G06F13/4291

    摘要： An order in which bits for serial data are transmitted or received by a first device, integrated circuit (IC) or logic, is programmable to be either from most significant bit (MSB) to least significant bit (LSB) or from LSB to MSB. Therefore, when the first device is used with a second device, integrated circuit (IC) or logic, which can handle the serial data in only one order, the first device is programmed, or configured, to handle the serial data in the same order as the second device.

    摘要翻译： 用于串行数据的位由第一器件，集成电路（IC）或逻辑发送或接收的顺序可编程为从最高有效位（MSB）到最低有效位（LSB）或从LSB到MSB。 因此，当第一设备与第二设备，集成电路（IC）或逻辑一起使用时，其可以仅以一个顺序处理串行数据，第一设备被编程或配置为以相同顺序处理串行数据 作为第二设备。

    Zero phase and frequency restart PLL
    6.
    发明授权
    Zero phase and frequency restart PLL 有权
    零相和频率重启PLL

    公开(公告)号：US06566922B1

    公开(公告)日：2003-05-20

    申请号：US10052929

    申请日：2001-10-29

    申请人： David L. Schell ,  Peter J. Windler

    发明人： David L. Schell ,  Peter J. Windler

    IPC分类号： G11B509

    CPC分类号： G11B20/1025 ,  G11B20/1403 ,  H03L7/091 ,  H03L7/10

    摘要： A circuit generally comprising a first circuit and a phase lock loop. The first circuit may be configured to (i) collect a plurality of samples per cycle during a plurality of cycles of an input signal and (ii) calculate a phase offset and a frequency offset for the input signal relative to a clock signal in response to the samples. The phase lock loop may be configured to (i) preset a phase error signal to the phase offset and a frequency error signal to the frequency offset and (ii) generate the clock signal in response to the phase error signal and the frequency error signal.

    摘要翻译： 通常包括第一电路和锁相环的电路。 第一电路可以被配置为：（i）在输入信号的多个周期期间每个周期收集多个样本，以及（ii）响应于时钟信号计算相对于时钟信号的输入信号的相位偏移和频率偏移 样品。 锁相环可以被配置为（i）将相位误差信号预设为相位偏移，并将频率误差信号预设为频率偏移，并响应于相位误差信号和频率误差信号产生时钟信号。

    Method and apparatus for calibrating an optical disk system
    9.
    发明授权
    Method and apparatus for calibrating an optical disk system 失效
    用于校准光盘系统的方法和装置

    公开(公告)号：US4907212A

    公开(公告)日：1990-03-06

    申请号：US204697

    申请日：1988-06-09

    申请人： Kenton J. Pharris ,  David L. Schell

    发明人： Kenton J. Pharris ,  David L. Schell

    IPC分类号： G11B7/0037 ,  G11B7/09

    CPC分类号： G11B7/0945 ,  G11B7/0037

    摘要： Calibration of read timing, write timing and focus is accomplished automatically by comparing reflectance signals. The timing or focus settings are preferably modified, and signals are again compared under the modified adjustment settings. The read timing adjustment includes comparing signals from mark positions immediately preceding and immediately following an isolated mark and adjusting read delay to achieve small or minimum differences between the signals at the mark positions immediately preceding and immediately following the isolated mark bit position. Focus calibration is accomplished by comparing the value of the signal from a mark with the value from a mark position immediately adjacent the mark and adjusting the focus offset until a larger maximum difference between the two signals is achieved. The write timing calibration is preferably achieved by causing the write circuitry to emit a low-power light beam in the vicinity of an unwritten mark position and adjusting the write timing delay circuitry until a low or minimum signal, i.e. high reflectance, is achieved at a desired mark position.

    摘要翻译： 通过比较反射信号自动完成校准读取时序，写时序和对焦。 优选地修改定时或聚焦设置，并且在修改的调整设置下再次比较信号。 读取定时调整包括比较紧接在隔离标记之前和之后的标记位置的信号，并且调整读取延迟以实现在隔离标记位位置之前和之后的标记位置处的信号之间的小或最小差异。 通过将来自标记的信号的值与来自与标记紧邻的标记位置的值进行比较并且调整聚焦偏移直到达到两个信号之间的较大的最大差异来实现聚焦校准。 写定时校准优选通过使写电路在未写标记位置附近发射低功率光束并调整写时序延迟电路来实现，直到达到低或低信号，即高反射率，在 所需标记位置。

    Optical disc system having current monitoring circuit with controller for laser driver and method for operating same
    10.
    发明授权
    Optical disc system having current monitoring circuit with controller for laser driver and method for operating same 失效
    具有电流监测电路的光盘系统，具有用于激光驱动器的控制器及其操作方法

    公开(公告)号：US06236625B1

    公开(公告)日：2001-05-22

    申请号：US08999892

    申请日：1997-08-22

    申请人： David L. Schell ,  David E. Lewis

    发明人： David L. Schell ,  David E. Lewis

    IPC分类号： G11B700

    CPC分类号： G11B11/10576 ,  G11B11/10504 ,  G11B11/10595

    摘要： A magneto-optical drive system having a computer that monitors the current in the bias coil of a magnetomotive field generator to determine when a predetermined current threshold is exceeded. When the threshold is exceeded, a sufficiently strong magnetic field is generated to permit writing of information on a storage medium utilizing a laser. A laser pulse generator is then enabled. The device thereby achieves a substantially shortened write cycle.

    摘要翻译： 一种具有计算机的磁光驱动系统，其监视磁动势场发生器的偏置线圈中的电流以确定何时超过预定电流阈值。 当超过阈值时，产生足够强的磁场，以允许使用激光将信息写入存储介质上。 然后启用激光脉冲发生器。 因此，该装置实现了基本上缩短的写周期。