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1. 发明授权

US06785207B2 Wobble signal reproducing circuit 有权
标题翻译：摆动信号再现电路
公开(公告)号：US06785207B2
公开(公告)日：2004-08-31
申请号：US09794393
申请日：2001-02-28
申请人： Kouichirou Nishimura , Kouichi Hirose , Manabu Katsuki , Toshifumi Takeuchi
发明人： Kouichirou Nishimura , Kouichi Hirose , Manabu Katsuki , Toshifumi Takeuchi
IPC分类号： G11B509
CPC分类号： G11B7/005 , G11B7/0053 , G11B7/0901 , G11B7/0941 , G11B7/0943 , G11B7/0948 , G11B2007/0006
摘要： The present invention has an object to stably reproduce wobble signals of all disks of CD-R/RW, DVD-R/RW and DVD-RAM by one wobble signal reproducing circuit. In the wobble signal reproducing circuit, an AGC (AUTOMATIC GAIN CONTROL) circuit for equating a push-pull circuit output of a wide range and an RF amplitude of an optical detector output of two systems obtained by push-pull, and an AGC circuit for making a wobble amplitude uniform are provided with a function to hold a gain or to change over a response time constant, and an address information recording region (PID region) at the time of reproduction, the AGC (AUTOMATIC GAIN CONTROL) is held or the response time constant is changed over.
摘要翻译：本发明的目的是通过一个摆动信号再现电路来稳定地再现CD-R / RW，DVD-R / RW和DVD-RAM的所有磁盘的摆动信号。在摆动信号再现电路中，用于将宽范围的推挽电路输出与通过推挽获得的两个系统的光检测器输出的RF振幅等价的AGC（自动增益控制）电路和用于提供了摆动幅度均匀性，具有保持增益或改变响应时间常数的功能，以及再现时的地址信息记录区域（PID区域），AGC（自动增益控制）被保持或响应时间常数被改变。

2. 发明授权

US06904086B2 Adaptive equalizer circuit 失效
标题翻译：自适应均衡器电路
公开(公告)号：US06904086B2
公开(公告)日：2005-06-07
申请号：US09812694
申请日：2001-03-21
申请人： Kouichirou Nishimura , Kouichi Hirose
发明人： Kouichirou Nishimura , Kouichi Hirose
IPC分类号： G11B20/10 , H03H15/00 , H03H21/00 , H04B3/06 , H04L25/03 , H03H7/30 , H03H7/40 , H03K5/159
CPC分类号： H03H21/0012 , H04L25/03038 , H04L2025/03477 , H04L2025/03617
摘要： An adaptive equalizer processing an input having a fluctuating amplitude realizes a stable adaptive equalization operation without changing over a reference value for computing an equalization error. An input signal is held as a sample with a timing signal shifted from a reference clock of the input signal by a phase of ½ cycle. An equalization output is compute from sample data. The difference between only the first output value after a zero-crossing and an arbitrary reference value is computed, and the computed value is set as an equalization error. A coefficient of the adaptive equalization circuit is updated from the equalization error and the sample data. To stabilize for displacement of symmetry of the input, the reference value of the equalizer is changed corresponding to the change of a digitization threshold value of a digitization circuit which constitutes a rear stage of the adaptive equalizer.
摘要翻译：处理具有波动幅度的输入的自适应均衡器实现稳定的自适应均衡操作，而不改变用于计算均衡误差的参考值。输入信号被保持为具有从输入信号的参考时钟偏移了1/2周期的定时信号作为样本。从样本数据计算均衡输出。计算零过零之后的第一输出值与任意的基准值之间的差，并将计算出的值设定为均衡误差。根据均衡误差和样本数据更新自适应均衡电路的系数。为了稳定输入的对称位移，均衡器的参考值根据构成自适应均衡器的后级的数字化电路的数字化阈值的变化而改变。

3. 发明申请

US20070030769A1 Wobble signal reproducing circuit 有权
标题翻译：摆动信号再现电路
公开(公告)号：US20070030769A1
公开(公告)日：2007-02-08
申请号：US11546289
申请日：2006-10-12
申请人： Kouichirou Nishimura , Kouichi Hirose , Manabu Katsuki , Toshifumi Takeuchi
发明人： Kouichirou Nishimura , Kouichi Hirose , Manabu Katsuki , Toshifumi Takeuchi
IPC分类号： G11B7/00
CPC分类号： G11B7/005 , G11B7/0053 , G11B7/0901 , G11B7/0941 , G11B7/0943 , G11B7/0948 , G11B2007/0006
摘要： The present invention has an object to stably reproduce wobble signals of all disks of CD-R/RW, DVD-R/RW and DVD-RAM by one wobble signal reproducing circuit. In the wobble signal reproducing circuit, an AGC (AUTOMATIC GAIN CONTROL) circuit for equating a push-pull circuit output of a wide range and an RF amplitude of an optical detector output of two systems obtained by push-pull, and an AGC (AUTOMATIC GAIN CONTROL) circuit for making a wobble amplitude uniform are provided with a function to hold a gain or to change over a response time constant, and at the time of reproduction of the DVD-R/RW, a land pre-pit region is detected by the push-pull output to hold AGC (AUTOMATIC GAIN CONTROL) or change over a response time constant. Besides, in an address information recording region (PID region) at the time of reproduction of the DVD-RAM, the AGC (AUTOMATIC GAIN CONTROL) is held or the response time constant is changed over.
摘要翻译：本发明的目的是通过一个摆动信号再现电路来稳定地再现CD-R / RW，DVD-R / RW和DVD-RAM的所有磁盘的摆动信号。在摆动信号再现电路中，用于将宽范围的推挽电路输出与通过推挽获得的两个系统的光检测器输出的RF幅度和AGC（AUTOMATIC）之间进行等效的AGC（自动增益控制）电路提供摆动幅度均匀的增益控制电路具有保持增益或改变响应时间常数的功能，并且在再现DVD-R / RW时，检测到纹间预制凹坑区域通过推挽输出保持AGC（自动增益控制）或更改响应时间常数。此外，在再现DVD-RAM时的地址信息记录区域（PID区域）中，保持AGC（自动增益控制）或者改变响应时间常数。

4. 发明授权

US07295499B2 Wobble signal reproducing circuit 有权
公开(公告)号：US07295499B2
公开(公告)日：2007-11-13
申请号：US11546289
申请日：2006-10-12
申请人： Kouichirou Nishimura , Kouichi Hirose , Manabu Katsuki , Toshifumi Takeuchi
发明人： Kouichirou Nishimura , Kouichi Hirose , Manabu Katsuki , Toshifumi Takeuchi
IPC分类号： G11B7/00
CPC分类号： G11B7/005 , G11B7/0053 , G11B7/0901 , G11B7/0941 , G11B7/0943 , G11B7/0948 , G11B2007/0006
摘要： The present invention has an object to stably reproduce wobble signals of all disks of CD-R/RW, DVD-R/RW and DVD-RAM by one wobble signal reproducing circuit. In the wobble signal reproducing circuit, an AGC (AUTOMATIC GAIN CONTROL) circuit for equating a push-pull circuit output of a wide range and an RF amplitude of an optical detector output of two systems obtained by push-pull, and an AGC (AUTOMATIC GAIN CONTROL) circuit for making a wobble amplitude uniform are provided with a function to hold a gain or to change over a response time constant, and at the time of reproduction of the DVD-R/RW, a land pre-pit region is detected by the push-pull output to hold AGC (AUTOMATIC GAIN CONTROL) or change over a response time constant. Besides, in an address information recording region (PID region) at the time of reproduction of the DVD-RAM, the AGC (AUTOMATIC GAIN CONTROL) is held or the response time constant is changed over.

5. 发明授权

US07133335B2 Wobble signal reproducing circuit 有权
标题翻译：摆动信号再现电路
公开(公告)号：US07133335B2
公开(公告)日：2006-11-07
申请号：US10836213
申请日：2004-05-03
申请人： Kouichirou Nishimura , Kouichi Hirose , Manabu Katsuki , Toshifumi Takeuchi
发明人： Kouichirou Nishimura , Kouichi Hirose , Manabu Katsuki , Toshifumi Takeuchi
IPC分类号： G11B7/05 , G11B19/02
CPC分类号： G11B7/005 , G11B7/0053 , G11B7/0901 , G11B7/0941 , G11B7/0943 , G11B7/0948 , G11B2007/0006
摘要： The present invention has an object to stably reproduce wobble signals of all disks of CD-R/RW, DVD-R/RW and DVD-RAM by one wobble signal reproducing circuit. In the wobble signal reproducing circuit, an AGC (AUTOMATIC GAIN CONTROL) circuit for equating a push-pull circuit output of a wide range and an RF amplitude of an optical detector output of two systems obtained by push-pull, and an AGC (AUTOMATIC GAIN CONTROL) circuit for making a wobble amplitude uniform are provided with a function to hold a gain or to change over a response time constant, and at the time of reproduction of the DVD-R/RW, a land pre-pit region is detected by the push-pull output to hold AGC (AUTOMATIC GAIN CONTROL) or change over a response time constant. Besides, in an address information recording region (PID region) at the time of reproduction of the DVD-RAM, the AGC (AUTOMATIC GAIN CONTROL) is held or the response time constant is changed over.
摘要翻译：本发明的目的是通过一个摆动信号再现电路来稳定地再现CD-R / RW，DVD-R / RW和DVD-RAM的所有磁盘的摆动信号。在摆动信号再现电路中，用于将宽范围的推挽电路输出与通过推挽获得的两个系统的光检测器输出的RF幅度和AGC（AUTOMATIC）之间进行等效的AGC（自动增益控制）电路提供摆动幅度均匀的增益控制电路具有保持增益或改变响应时间常数的功能，并且在再现DVD-R / RW时，检测到纹间预制凹坑区域通过推挽输出保持AGC（自动增益控制）或更改响应时间常数。此外，在再现DVD-RAM时的地址信息记录区域（PID区域）中，保持AGC（自动增益控制）或者改变响应时间常数。

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