公开(公告)号：US20070280069A1

公开(公告)日：2007-12-06

申请号：US11755186

申请日：2007-05-30

申请人： Yuh Cheng ,  Chih-Ching Chen ,  Chia-Wei Liao ,  Ming-Jiou Yu ,  Kuo-Jung Lan ,  Shu-Hung Chou ,  Bing-Yu Hsieh

发明人： Yuh Cheng ,  Chih-Ching Chen ,  Chia-Wei Liao ,  Ming-Jiou Yu ,  Kuo-Jung Lan ,  Shu-Hung Chou ,  Bing-Yu Hsieh

IPC分类号： G11B20/10

CPC分类号： G11B20/10009 ,  G11B7/0053 ,  G11B20/10027 ,  G11B20/10037 ,  G11B20/1217 ,  G11B27/24 ,  G11B2020/1238 ,  G11B2020/1239 ,  G11B2020/1268 ,  G11B2020/1269 ,  G11B2020/1274 ,  G11B2020/1287 ,  G11B2220/2562

摘要： The invention provides an automatic gain controller processing an input signal for wobble detection circuit. An exemplary embodiment of the automatic gain controller comprises an envelope detection module, an analog to digital converter, a digital control module, a digital to analog converter, and a variable gain amplifier. The envelope detection module detects an envelope magnitude of an amplified signal. The analog to digital converter converts the envelope magnitude from analog to digital to obtain a digital envelope signal. The digital control module determines a digital gain signal for amplification of the input signal according to the digital envelope signal. The digital to analog converter converts the digital gain signal to an analog gain signal. The variable gain amplifier then amplifies the input signal according to the analog gain signal to obtain the amplified wobble signal.

摘要翻译： 本发明提供一种自动增益控制器来处理摆动检测电路的输入信号。 自动增益控制器的示例性实施例包括包络检测模块，模数转换器，数字控制模块，数模转换器和可变增益放大器。 包络检测模块检测放大信号的包络幅度。 模数转换器将包络幅度从模拟转换为数字，以获得数字包络信号。 数字控制模块根据数字包络信号确定用于放大输入信号的数字增益信号。 数模转换器将数字增益信号转换为模拟增益信号。 然后，可变增益放大器根据模拟增益信号放大输入信号，以获得放大的摆动信号。

公开(公告)号：US20110110205A1

公开(公告)日：2011-05-12

申请号：US13009668

申请日：2011-01-19

申请人： Chia-Wei Liao ,  Chih-Ching Chen ,  Yuh Cheng ,  Ming-Jiou Yu ,  Kuo-Jung Lan ,  Chun-Yu Lin ,  Shu-Hung Chou

发明人： Chia-Wei Liao ,  Chih-Ching Chen ,  Yuh Cheng ,  Ming-Jiou Yu ,  Kuo-Jung Lan ,  Chun-Yu Lin ,  Shu-Hung Chou

IPC分类号： G11B7/00

CPC分类号： G11B7/0941 ,  G11B7/0903

摘要： The invention provides an apparatus for controlling servo signal gains of an optical disc drive. The apparatus adjusts the gains of a plurality of servo signals controlling a servo system of the optical disc drive when the optical disk drive encounters an operating state transition. In a first mode, at least one AGC loop of the apparatus compensates the gains of the servo signals with a selectable bandwidth during a specific period after the operating state transition to accelerate the convergence of the servo signals. In a second mode, at least one AGC loop of the apparatus reloads the previously saved convergence values or pre-determined values as the initial values according to the current operating state immediately after the operating state transition to accelerate the convergence of the servo signals.

摘要翻译： 本发明提供一种用于控制光盘驱动器的伺服信号增益的装置。 当光盘驱动器遇到操作状态转换时，该装置调节控制光盘驱动器的伺服系统的多个伺服信号的增益。 在第一模式中，该装置的至少一个AGC环路在操作状态转换之后的特定时段期间以可选择的带宽补偿伺服信号的增益，以加速伺服信号的收敛。 在第二模式中，装置的至少一个AGC环路根据紧接在运行状态转换之后的当前运行状态重新加载先前存储的收敛值或预定值作为初始值，以加速伺服信号的收敛。

公开(公告)号：US07706219B2

公开(公告)日：2010-04-27

申请号：US11758017

申请日：2007-06-05

申请人： Chia-Wei Liao ,  Chih-Ching Chen ,  Yuh Cheng ,  Ming-Jiou Yu ,  Kuo-Jung Lan ,  Chun-Yu Lin ,  Shiue-Shin Liu ,  Shu-Hung Chou ,  Yu-Hsuan Lin ,  Jong-Woei Chen

发明人： Chia-Wei Liao ,  Chih-Ching Chen ,  Yuh Cheng ,  Ming-Jiou Yu ,  Kuo-Jung Lan ,  Chun-Yu Lin ,  Shiue-Shin Liu ,  Shu-Hung Chou ,  Yu-Hsuan Lin ,  Jong-Woei Chen

IPC分类号： G11B7/00

CPC分类号： G11B20/10 ,  G11B7/0903 ,  G11B7/0909 ,  G11B7/0943 ,  G11B7/1263 ,  G11B20/10009 ,  G11B2220/2537

摘要： A signal processing apparatus includes sample and hold units for holding a plurality of analog photo diode signals. A signal holding controller generates control signals to the sample and hold units for holding the analog photo diode signals. Analog adjusting modules adjust the held analog photo diode signals. A multiplexer selectively couples one input end of the multiplexer to the output end of the multiplexer for outputting the adjusted analog photo diode signals. An analog to digital converter converts the adjusted analog photo diode signals into digital photo diode signals.

摘要翻译： 信号处理装置包括用于保持多个模拟光电二极管信号的采样和保持单元。 信号保持控制器产生用于保持模拟光电二极管信号的采样和保持单元的控制信号。 模拟调整模块调节保持的模拟光电二极管信号。 复用器选择性地将多路复用器的输入端耦合到多路复用器的输出端，以输出经调整的模拟光电二极管信号。 模数转换器将调整后的模拟光电二极管信号转换为数字光电二极管信号。

公开(公告)号：US20070280066A1

公开(公告)日：2007-12-06

申请号：US11758082

申请日：2007-06-05

申请人： Chia-Wei Liao ,  Chih-Ching Chen ,  Yuh Cheng ,  Ming-Jiou Yu ,  Kuo-Jung Lan ,  Chun-Yu Lin ,  Shu-Hung Chou

发明人： Chia-Wei Liao ,  Chih-Ching Chen ,  Yuh Cheng ,  Ming-Jiou Yu ,  Kuo-Jung Lan ,  Chun-Yu Lin ,  Shu-Hung Chou

IPC分类号： G11B7/00

CPC分类号： G11B7/0941 ,  G11B7/0903

摘要： The invention provides an apparatus for controlling servo signal gains of an optical disc drive. The apparatus adjusts the gains of a plurality of servo signals controlling a servo system of the optical disc drive according to a closed-loop mode or a state-reloading mode whenever the optical disk drive encounters an operating state transition. In closed-loop mode, at least one AGC loop of the apparatus compensates the gains of the servo signals with a selectable bandwidth during a specific period after the operating state transition to accelerate the convergence of the servo signals. In state-reloading mode, at least one AGC loop of the apparatus reloads the previously saved convergence values or pre-determined values as the initial values according to the current operating state immediately after the operating state transition to accelerate the convergence of the servo signals.

摘要翻译： 本发明提供一种用于控制光盘驱动器的伺服信号增益的装置。 只要光盘驱动器遇到操作状态转换，该装置根据闭环模式或状态重新加载模式来调整控制光盘驱动器的伺服系统的多个伺服信号的增益。 在闭环模式中，该装置的至少一个AGC环路在操作状态转换之后的特定周期期间以可选择的带宽补偿伺服信号的增益，以加速伺服信号的收敛。 在状态重新加载模式中，装置的至少一个AGC回路根据当前运行状态在运行状态转换之后重新加载先前存储的收敛值或预定值作为初始值，以加速伺服信号的收敛。

公开(公告)号：US07796480B2

公开(公告)日：2010-09-14

申请号：US11757426

申请日：2007-06-04

申请人： Yuh Cheng ,  Chih-Ching Chen ,  Chia-Wei Liao ,  Ming-Jiou Yu ,  Kuo-Jung Lan ,  Shu-Hung Chou ,  Yu-Hsuan Lin

发明人： Yuh Cheng ,  Chih-Ching Chen ,  Chia-Wei Liao ,  Ming-Jiou Yu ,  Kuo-Jung Lan ,  Shu-Hung Chou ,  Yu-Hsuan Lin

IPC分类号： G11B7/00

CPC分类号： G11B7/094 ,  G11B7/0941 ,  G11B7/0956 ,  G11B20/10009 ,  G11B2020/1287

摘要： An apparatus for light spot servo signal detection for reading an optical recording medium having a plurality of non-writable areas between writable data areas containing address information. An optical pickup provides a light spot to the non-writable areas of the optical recording medium with a predetermined state according to a control signal, and detects optical reflecting signals from the optical recording medium to generate a detection signal. A signal adjusting module offsets signal levels of the detection signal to an operating range to generate an offset shifted detection signal. An analog to digital converter digitizes the offset shifted detection signal to generate a digital signal. A detection circuit detects the servo detection signal according to the digital signal.

摘要翻译： 一种光点伺服信号检测装置，用于读取在包含地址信息的可写数据区之间具有多个不可写区域的光记录介质。 光拾取器根据控制信号以预定状态向光记录介质的不可写区域提供光点，并且检测来自光记录介质的光反射信号以产生检测信号。 信号调整模块将检测信号的信号电平偏移到工作范围以产生偏移移位的检测信号。 模数转换器对偏移检测信号进行数字化以产生数字信号。 检测电路根据数字信号检测伺服检测信号。

公开(公告)号：US07706238B2

公开(公告)日：2010-04-27

申请号：US11758018

申请日：2007-06-05

申请人： Ming-Jiou Yu ,  Chun-Yu Lin ,  Kuo-Jung Lan ,  Kuan-Hua Chao ,  Chia-Wei Liao ,  Chih-Ching Chen ,  Shu-Hung Chou ,  Jong-Woei Chen

发明人： Ming-Jiou Yu ,  Chun-Yu Lin ,  Kuo-Jung Lan ,  Kuan-Hua Chao ,  Chia-Wei Liao ,  Chih-Ching Chen ,  Shu-Hung Chou ,  Jong-Woei Chen

IPC分类号： G11B7/00

CPC分类号： G11B7/1263 ,  G11B7/08505 ,  G11B7/0903

摘要： A laser power control system and related method for reducing a settling time in a target laser power transition are disclosed. The laser power control system includes a state decision circuit, for generating a state decision signal according to a selected operational state of a target circuit; a plurality of buffers, for storing a plurality of control data corresponding to a plurality of candidate operational states of the target circuit respectively; and a multiplexer, coupled between the state decision circuit and the buffers, for coupling a selected buffer of the buffers and the target circuit according to the state decision signal for outputting a control datum stored in the selected buffer to the target circuit.

摘要翻译： 公开了一种用于减少目标激光功率转换中的建立时间的激光功率控制系统和相关方法。 激光功率控制系统包括状态判定电路，用于根据所选择的目标电路的操作状态产生状态判定信号; 多个缓冲器，用于分别存储对应于所述目标电路的多个候选操作状态的多个控制数据; 以及耦合在所述状态判定电路和所述缓冲器之间的多路复用器，用于根据用于将所选择的缓冲器中存储的控制数据输出到所述目标电路的所述状态判定信号来耦合所述缓冲器的选定缓冲器和所述目标电路。

公开(公告)号：US20070280062A1

公开(公告)日：2007-12-06

申请号：US11758102

申请日：2007-06-05

申请人： Kuo-Jung Lan ,  Chih-Ching Chen ,  Chia-Wei Liao ,  Yuh Cheng ,  Ming-Jiou Yu ,  Yu-Hsuan Lin ,  Shu-Hung Chou

发明人： Kuo-Jung Lan ,  Chih-Ching Chen ,  Chia-Wei Liao ,  Yuh Cheng ,  Ming-Jiou Yu ,  Yu-Hsuan Lin ,  Shu-Hung Chou

IPC分类号： G11B7/00

CPC分类号： G11B20/10009 ,  G11B20/10027 ,  G11B20/10037 ,  G11B20/10046

摘要： An apparatus and method of generating a zero crossing signal for an optical disc drive to reduce width deviation due to sampling effect, thereby improving servo control and detection. An embodiment of the apparatus comprises a reshaping device receiving a first digital servo signal of the optical disc drive to upsample the first digital servo signal data, thereby generating a second digital servo signal with higher resolution than the first digital servo signal; and a servo control-and-detection device receiving and slicing the second digital servo signal to generate a servo zero crossing signal.

摘要翻译： 一种用于产生用于光盘驱动器的过零信号以减少由于采样效应引起的宽度偏差的装置和方法，从而改善伺服控制和检测。 该装置的一个实施例包括重新成形装置，接收光盘驱动器的第一数字伺服信号以对第一数字伺服信号数据进行上采样，从而产生具有比第一数字伺服信号更高分辨率的第二数字伺服信号; 以及伺服控制和检测装置，接收和分割第二数字伺服信号以产生伺服过零信号。

公开(公告)号：US20070280061A1

公开(公告)日：2007-12-06

申请号：US11758019

申请日：2007-06-05

申请人： Kuo-Jung Lan ,  Chun-Yu Lin ,  Yu-Hsuan Lin ,  Ming-Jiou Yu ,  Chih-Ching Chen ,  Chia-Wei Liao ,  Shu-Hung Chou

发明人： Kuo-Jung Lan ,  Chun-Yu Lin ,  Yu-Hsuan Lin ,  Ming-Jiou Yu ,  Chih-Ching Chen ,  Chia-Wei Liao ,  Shu-Hung Chou

IPC分类号： G11B7/00

CPC分类号： G11B20/10027 ,  G11B20/10046 ,  G11B20/10203 ,  G11B20/10222 ,  G11B2220/2575

摘要： An apparatus of processing an input signal generated according to accessing of an optical storage medium is disclosed. The apparatus has a detecting circuit and a decision logic. The detecting circuit is coupled to the input signal for detecting a target peak value and a target bottom value of the input signal within a time period, wherein the time period is not less than a period of a reference signal generated according to accessing of the optical storage medium. The decision logic is coupled to the detecting circuit for determining a reference level according to the target peak value and the target bottom value.

摘要翻译： 公开了一种处理根据光存储介质的存取产生的输入信号的装置。 该装置具有检测电路和判定逻辑。 检测电路耦合到输入信号，用于在一段时间内检测输入信号的目标峰值和目标底值，其中时间周期不小于根据光学访问产生的参考信号的周期 存储介质。 决定逻辑耦合到检测电路，用于根据目标峰值和目标底值确定参考电平。

公开(公告)号：US07911891B2

公开(公告)日：2011-03-22

申请号：US11758082

申请日：2007-06-05

申请人： Chia-Wei Liao ,  Chih-Ching Chen ,  Yuh Cheng ,  Ming-Jiou Yu ,  Kuo-Jung Lan ,  Chun-Yu Lin ,  Shu-Hung Chou

发明人： Chia-Wei Liao ,  Chih-Ching Chen ,  Yuh Cheng ,  Ming-Jiou Yu ,  Kuo-Jung Lan ,  Chun-Yu Lin ,  Shu-Hung Chou

IPC分类号： G11B7/00

CPC分类号： G11B7/0941 ,  G11B7/0903

摘要： The invention provides an apparatus for controlling servo signal gains of an optical disc drive. The apparatus adjusts the gains of a plurality of servo signals controlling a servo system of the optical disc drive according to a closed-loop mode or a state-reloading mode whenever the optical disk drive encounters an operating state transition. In closed-loop mode, at least one AGC loop of the apparatus compensates the gains of the servo signals with a selectable bandwidth during a specific period after the operating state transition to accelerate the convergence of the servo signals. In state-reloading mode, at least one AGC loop of the apparatus reloads the previously saved convergence values or pre-determined values as the initial values according to the current operating state immediately after the operating state transition to accelerate the convergence of the servo signals.

摘要翻译： 本发明提供一种用于控制光盘驱动器的伺服信号增益的装置。 只要光盘驱动器遇到操作状态转换，该装置根据闭环模式或状态重新加载模式来调整控制光盘驱动器的伺服系统的多个伺服信号的增益。 在闭环模式中，该装置的至少一个AGC环路在操作状态转换之后的特定周期期间以可选择的带宽补偿伺服信号的增益，以加速伺服信号的收敛。 在状态重新加载模式中，装置的至少一个AGC回路根据当前运行状态在运行状态转换之后重新加载先前存储的收敛值或预定值作为初始值，以加速伺服信号的收敛。

公开(公告)号：US20070291622A1

公开(公告)日：2007-12-20

申请号：US11758094

申请日：2007-06-05

申请人： Kuo-Jung Lan ,  Chih-Ching Chen ,  Chia-Wei Liao ,  Yuh Cheng ,  Ming-Jiou Yu ,  Yu-Hsuan Lin ,  Shu-Hung Chou

发明人： Kuo-Jung Lan ,  Chih-Ching Chen ,  Chia-Wei Liao ,  Yuh Cheng ,  Ming-Jiou Yu ,  Yu-Hsuan Lin ,  Shu-Hung Chou

IPC分类号： G11B7/00

CPC分类号： G11B7/0943 ,  G11B7/0903 ,  G11B7/0909 ,  G11B7/1263

摘要： A high pass filtering device for an optical disc drive comprises a first low pass filter (LPF) of a first sampling rate, filtering a digital input signal; a down-sampler receiving a first filtered signal form the first LPF to down-sample the first filtered signal by an integer factor N; a second LPF of a second sampling rate, filtering a first down-sampled signal from the down-sampler, wherein the second LPF has a corner frequency corresponding to a desired frequency of the high pass filtering device, and the second sampling rate is equal to 1/N times the first sampling rate; an up-sampler receiving a second filtered signal from the second LPF to up-sample the second filtered signal by the factor N; and a subtractor subtracting an up-sampled signal output by the up-sampler from the digital input signal when the filter frequency is below a threshold frequency.

摘要翻译： 用于光盘驱动器的高通滤波装置包括第一采样率的第一低通滤波器（LPF），对数字输入信号进行滤波; 下采样器从第一LPF接收第一滤波信号，以对第一滤波信号进行下采样整数因子N; 第二采样率的第二LPF，滤波来自下采样器的第一下采样信号，其中第二LPF具有对应于高通滤波器件的期望频率的转角频率，第二采样率等于 1 / N次第一次采样率; 上采样器接收来自第二LPF的第二滤波信号，以将第二滤波信号向上采样因子N; 以及当滤波器频率低于阈值频率时，减法器从数字输入信号中减去上采样器输出的上采样信号。