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    • 5. 发明授权
    • Optical disk drive signal calibration method and device for the same
    • 光盘驱动器信号的校准方法和设备相同
    • US07447134B2
    • 2008-11-04
    • US11349936
    • 2006-02-09
    • Chia-Hua ChouChih-Cheng Chen
    • Chia-Hua ChouChih-Cheng Chen
    • G11B5/09
    • G11B7/1267
    • The present invention is described for compensating a signal which is transmitted by a transmitting module of the optical disk drive controller through a signal channel and received and reshaped by a receiving module of the optical pickup head to calibrate the duty cycle distortion occurred. The claimed method has the steps of providing a periodic test signal, and then delaying the periodic test signal to form an adjusted test signal and adjusting a delay of an edge between the periodic test signal and the adjusted test signal instructed by a calibration signal. Afterward, the method further has the steps of transmitting the adjusted test signal to the receiving module through the signal channel, and receiving and reshaping the adjusted test signal to form a received signal, and then generating a monitor signal, finally, the method has a step of generating the calibration signal in accordance with the monitor signal.
    • 描述了本发明,用于补偿由光盘驱动器控制器的发送模块通过信号通道发送的信号,并由光学拾取头的接收模块接收和重新整形,以校准发生的占空比失真。 要求保护的方法具有提供周期性测试信号,然后延迟周期性测试信号以形成调整的测试信号,并且调整周期性测试信号与由校准信号指示的经调整的测试信号之间的边缘的延迟。 此后,该方法还具有通过信号通道将调整后的测试信号发送到接收模块的步骤,并且接收和重新调整经调整的测试信号以形成接收信号,然后产生监视信号,最后该方法具有 根据监视信号产生校准信号的步骤。
    • 8. 发明授权
    • Differential charge pump with common-mode feedback compensation
    • 差分电荷泵,具有共模反馈补偿
    • US07075348B2
    • 2006-07-11
    • US10270597
    • 2002-10-16
    • Tse-Hsiang HsuChih-Cheng Chen
    • Tse-Hsiang HsuChih-Cheng Chen
    • H03L7/093H03F3/45
    • H03L7/0896
    • A differential charge pump includes a first current, a second current, a first switching device, a second switching device, a first phase inverting switching device, a second phase inverting switching device, and a common mode feedback device. The common mode feedback device is used to adjust the current level exported by the first current source, according to the common mode voltage of the differential charge pump, so that the respective currents exported by the first current source and the second current source are to be the same. The present invention has used the property that the common mode voltage of the differential charge pump should be a constant value, so as to correct the level of the current source. As a result, the current exported by the differential charge pump can be precisely corrected. Also, the present invention only needs one charge pump, so that the structure is simple and the fabrication is easy. In addition, no matter whether there is a rising or falling signal, the correction can be performed. Therefore, it has no issue of shift for the common mode voltage.
    • 差分电荷泵包括第一电流,第二电流,第一开关装置,第二开关装置,第一相位反相开关装置,第二相位反相开关装置和共模反馈装置。 共模反馈装置用于根据差分电荷泵的共模电压来调节由第一电流源输出的电流电平,使得由第一电流源和第二电流源输出的相应电流为 一样。 本发明使用了差分电荷泵的共模电压应当是一个恒定值,从而校正电流源的电平。 结果,可以精确地校正由差动电荷泵输出的电流。 此外,本发明仅需要一个电荷泵,使结构简单,制造容易。 另外,无论是上升还是下降信号,都可以进行校正。 因此,对共模电压没有偏移的问题。
    • 10. 发明授权
    • Method and device for jitter enhancement in an optical disc system
    • 用于光盘系统抖动增强的方法和装置
    • US07054250B2
    • 2006-05-30
    • US10358529
    • 2003-02-05
    • Tse-Hsiang HsuChih-Cheng Chen
    • Tse-Hsiang HsuChih-Cheng Chen
    • G11B7/00
    • G11B7/0053G11B20/24
    • A method and device are provided for jitter enhancement in an optical disc system. The optical disc system generates a signal that includes an effective component having a first slew rate, and a pre-pit component having a second slew rate larger than the first slew rate. The signal is fed to a slew rate control module having a predetermined slew rate that is larger than the first slew rate and smaller than the second slew rate. The slew rate control module outputs a component of the signal having a slew rate not larger than the predetermined slew rate, and suppresses a component of the information signal having a slew rate larger than the predetermined slew rate.
    • 提供了一种用于光盘系统中的抖动增强的方法和装置。 光盘系统产生包括具有第一压摆率的有效部件和具有大于第一压摆率的第二转换速率的预凹陷部件的信号。 信号被馈送到具有大于第一转换速率并小于第二转换速率的预定转换速率的转换速率控制模块。 转换速率控制模块输出具有不大于预定转换速率的转换速率的信号的分量,并且抑制具有大于预定转换速率的转换速率的信息信号的分量。