-
公开(公告)号：US20050242890A1
公开(公告)日：2005-11-03
申请号：US10905904
申请日：2005-01-26
申请人： Wen-Yi Wu , Chao-Lung Tsai , Chi-Kwong Ho
发明人： Wen-Yi Wu , Chao-Lung Tsai , Chi-Kwong Ho
CPC分类号： H03L7/0893 , H03L7/087 , H03L7/089 , H03L7/10
摘要： An adaptive frequency detector used in a phase locked loop for detecting a frequency difference between an input signal and an output clock generated from an oscillator of the phase locked loop includes: a frequency comparator for generating an up signal or a down signal according to the frequency difference between the input signal and the output clock; and a pulse controller coupled to the frequency comparator for generating a charge signal based on the up signal or generating a discharge signal based on the down signal. The pulse controller dynamically adjusts the pulse width of the charge signal or the pulse width of the discharge signal.
摘要翻译： 用于检测输入信号和从锁相环振荡器产生的输出时钟之间的频率差的锁相环中的自适应频率检测器包括：频率比较器，用于根据频率产生上行信号或下降信号 输入信号与输出时钟之间的差异; 以及脉冲控制器，其耦合到所述频率比较器，用于基于所述上升信号产生充电信号或者基于所述下降信号产生放电信号。 脉冲控制器动态调整充电信号的脉冲宽度或放电信号的脉冲宽度。
-
公开(公告)号：US07369000B2
公开(公告)日：2008-05-06
申请号：US10905904
申请日：2005-01-26
申请人： Wen-Yi Wu , Chao-Lung Tsai , Chi-Kwong Ho
发明人： Wen-Yi Wu , Chao-Lung Tsai , Chi-Kwong Ho
IPC分类号： H03L7/00
CPC分类号： H03L7/0893 , H03L7/087 , H03L7/089 , H03L7/10
摘要： An adaptive frequency detector used in a phase locked loop for detecting a frequency difference between an input signal and an output clock generated from an oscillator of the phase locked loop includes: a frequency comparator for generating an up signal or a down signal according to the frequency difference between the input signal and the output clock; and a pulse controller coupled to the frequency comparator for generating a charge signal based on the up signal or generating a discharge signal based on the down signal. The pulse controller dynamically adjusts the pulse width of the charge signal or the pulse width of the discharge signal.
摘要翻译： 用于检测输入信号和从锁相环振荡器产生的输出时钟之间的频率差的锁相环中的自适应频率检测器包括：频率比较器，用于根据频率产生上行信号或下降信号 输入信号与输出时钟之间的差异; 以及脉冲控制器，其耦合到所述频率比较器，用于基于所述上升信号产生充电信号或者基于所述下降信号产生放电信号。 脉冲控制器动态调整充电信号的脉冲宽度或放电信号的脉冲宽度。
-
3.发明申请Device and method for calibrating linear velocity and track pitch for optical disc 审中-公开用于校准光盘的线速度和轨道间距的装置和方法公开(公告)号：US20050207297A1
公开(公告)日：2005-09-22
申请号：US11122060
申请日：2005-05-05
申请人： Chao-Long Tsai , Chi-Kwong Ho , Jin-Chuan Hsu
发明人： Chao-Long Tsai , Chi-Kwong Ho , Jin-Chuan Hsu
CPC分类号： G11B27/3027 , G11B7/0053 , G11B7/08529 , G11B27/24
摘要： A device and method for calibrating linear velocity and track pitch for an optical disc is disclosed. The device comprises a frequency divider, a synchronous bit-clock generator, a counter and a linear velocity and track pitch calculator. The frequency divider receives a motor frequency generator (FG) pulse and generates a motor rotation period signal (FG/X). The synchronous bit-clock generator generates a high frequency bit-clock according to a reproduced signal read from disc. The bit counter counts the pulse of the bit-clock for each period of the motor rotation period signal to generate the data amount M. The linear velocity and track pitch calculator calculates the linear velocity by a linear velocity function with the information of the data amount M and the motor rotation period. Then, the linear velocity and track pitch calculator calculates the track pitch by a pitch function with the information of the data amount, radius and linear velocity at different tracks.
摘要翻译： 公开了一种用于校准光盘的线速度和轨道间距的装置和方法。 该装置包括分频器，同步位时钟发生器，计数器和线速度和轨道间距计算器。 分频器接收电动机频率发生器（FG）脉冲，并产生电动机旋转周期信号（FG / X）。 同步位时钟发生器根据从盘读取的再现信号产生高频位时钟。 位计数器对电机旋转周期信号的每个周期的位时钟的脉冲进行计数，以产生数据量M.线速度和轨道间距计算器通过线速度函数来计算线速度，其中数据量的信息 M和电机旋转周期。 然后，线速度和轨道间距计算器通过具有不同轨迹的数据量，半径和线速度的信息的音调函数来计算轨道间距。
-
4.发明授权Method of switching the motor operation of an optical disc drive between the constant linear velocity mode and the constant angular velocity mode 失效在恒定线速度模式和恒定角速度模式之间切换光盘驱动器的电动机操作的方法
公开(公告)号：US6055219A
公开(公告)日：2000-04-25
申请号：US71073
申请日：1998-04-30
申请人： Chi-Kwong Ho , Chao-Long Tsai
发明人： Chi-Kwong Ho , Chao-Long Tsai
摘要： A method is provided for use on an optical disc drive, which can automatically detect the current radial position of the pickup head to thereby switch the motor operation between the CLV (constant linear velocity) mode and the CAV (constant angular velocity) mode for optimal performance of the optical disc drive. The current radial position of the pickup head is detected by using CLV and CAV position estimating means. If the current radial position of the pickup head is at a preset switching point, the mode of operation is switched from the current one to the other. Moreover, the reference signals used in the respective modes are adaptively varied so as to allow the data transfer rate of the data read operation on the optical disc to be consistent in both modes without interrupting the reading and transferring of the data from the optical disc. The method can thus allow the benefits of a high data transfer rate, short seek time, and low power consumption by the optical disc drive.
摘要翻译： 提供了一种用于光盘驱动器的方法，其可以自动检测拾取头的当前径向位置，从而在CLV（恒定线速度）模式和CAV（恒定角速度）模式之间切换电动机操作，以获得最佳 光盘驱动器的性能。 通过使用CLV和CAV位置估计装置来检测拾取头的当前径向位置。 如果拾取头的当前径向位置处于预设切换点，则操作模式从当前切换到另一切换。 此外，在各模式中使用的参考信号被自适应地改变，以便允许光盘上的数据读取操作的数据传输速率在两种模式下都是一致的，而不会中断从光盘读取和传送数据。 因此，该方法可以允许光盘驱动器具有高数据传输速率，寻找时间短，功耗低的优点。
-
5.发明授权Device and method for calibrating linear velocity and track pitch for optical disc drive 有权用于校准光盘驱动器的线速度和轨道间距的装置和方法公开(公告)号：US06914862B2
公开(公告)日：2005-07-05
申请号：US10073944
申请日：2002-02-14
申请人： Chao-Long Tsai , Chi-Kwong Ho , Jin-Chuan Hsu
发明人： Chao-Long Tsai , Chi-Kwong Ho , Jin-Chuan Hsu
CPC分类号： G11B27/3027 , G11B7/0053 , G11B7/08529 , G11B27/24
摘要： A device and method for calibrating linear velocity and track pitch for an optical disc is disclosed. The device comprises a frequency divider, a synchronous bit-clock generator, a counter and a linear velocity and track pitch calculator. The frequency divider receives a motor frequency generator (FG) pulse and generates a motor rotation period signal (FG/X). The synchronous bit-clock generator generates a high frequency bit-clock according to a reproduced signal read from disc. The bit counter counts the pulse of the bit-clock for each period of the motor rotation period signal to generate the data amount M. The linear velocity and track pitch calculator calculates the linear velocity by a linear velocity function with the information of the data amount M and the motor rotation period. Then, the linear velocity and track pitch calculator calculates the track pitch by a pitch function with the information of the data amount, radius and linear velocity at different tracks.
摘要翻译： 公开了一种用于校准光盘的线速度和轨道间距的装置和方法。 该装置包括分频器，同步位时钟发生器，计数器和线速度和轨道间距计算器。 分频器接收电动机频率发生器（FG）脉冲，并产生电动机旋转周期信号（FG / X）。 同步位时钟发生器根据从盘读取的再现信号产生高频位时钟。 位计数器对电机旋转周期信号的每个周期的位时钟的脉冲进行计数，以产生数据量M.线速度和轨道间距计算器通过线速度函数来计算线速度，其中数据量的信息 M和电机旋转时间。 然后，线速度和轨道间距计算器通过具有不同轨迹的数据量，半径和线速度的信息的音调函数来计算轨道间距。
-
6.发明授权Digitization apparatus and method using a finite state machine in feedback loop 有权数字化装置和方法在反馈环路中使用有限状态机公开(公告)号：US06496126B2
公开(公告)日：2002-12-17
申请号：US09981861
申请日：2001-10-17
IPC分类号： H03M136
摘要： A data slice circuit and the method thereof The data slice circuit comprises a digitizer, a finite state machine, and a digitizer parameter adjustment element. The digitizer receives an analog signal and converts to a digital signal. The finite state machine generates a state signal in response to the digital signal. The digitizer parameter adjustment element generates a parameter adjustment signal in response to the state signal from the finite state machine. The digital signal of the digitizer is adjusted in accordance with the parameter adjustment signal.
摘要翻译： 数据切片电路及其方法数据切片电路包括数字转换器，有限状态机和数字转换器参数调整元件。 数字化仪接收模拟信号并转换为数字信号。 有限状态机响应于数字信号产生状态信号。 数字转换器参数调整元件响应来自有限状态机的状态信号产生参数调整信号。 数字转换器的数字信号根据参数调整信号进行调整。
-
-
-
-
-
搜索结果
6 条记录 (耗时 0.019 秒)
