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公开(公告)号：US20070127350A1
公开(公告)日：2007-06-07
申请号：US10584772
申请日：2004-12-22
申请人： Yoshio Fukutomi , Toru Nagara
发明人： Yoshio Fukutomi , Toru Nagara
IPC分类号： G11B7/00
CPC分类号： G11B7/1263 , G11B7/1356 , G11B7/1395
摘要： In an optical disk apparatus, transmittance and reflectance of a polarization beam splitter 13 to the S polarization and the P polarization of laser beams are adjusted so that a first polarization component level ratio in the laser beam received by a light receiver for reproducing signal 17 from a laser diode 11 via the polarization beam splitter 13, and a second polarization component level ratio in the laser beam received by a light receiver for monitoring light source 18 from the laser diode 11 via the polarization beam splitter 13 become equal or the difference between the first and the second polarization component level ratios becomes within a predetermined permissible range.
摘要翻译： 在光盘装置中，调整偏振光束分离器13与激光的S偏振和P偏振的透射率和反射率，使得由用于再现信号17的光接收器接收的激光束中的第一偏振分量电平比 通过偏振分束器13的激光二极管11和由受光器接收的用于经由偏振分束器13从激光二极管11监测光源18的激光束中的第二偏振分量电平比变得相等或者 第一和第二偏振分量电平比变得在预定的允许范围内。
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公开(公告)号：US20050105414A1
公开(公告)日：2005-05-19
申请号：US10961161
申请日：2004-10-12
申请人： Toru Nagara , Yoshio Fukutomi
发明人： Toru Nagara , Yoshio Fukutomi
IPC分类号： G11B7/00
CPC分类号： G11B7/0903
摘要： An optical disk apparatus includes a digital signal processor, a photo-detector circuit, and a sample-and-hold circuit. By using a sampling-timing signal generated by the sampling-timing signal based on a sampling-timing signal transmitted from the digital signal processor to the photo-detector circuit through a flexible cable, the sample-and-hold circuit can be operated. Based on a sampling-timing signal dedicated for a side spot, the sample-and-hold circuit can be operated.
摘要翻译： 光盘装置包括数字信号处理器，光电检测器电路和采样和保持电路。 通过使用基于从数字信号处理器通过柔性电缆发送到光检测器电路的采样定时信号由采样定时信号产生的采样定时信号，可以操作采样保持电路。 基于专用于侧面点的采样定时信号，可以操作采样和保持电路。
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公开(公告)号：US07570562B2
公开(公告)日：2009-08-04
申请号：US10584772
申请日：2004-12-22
申请人： Yoshio Fukutomi , Toru Nagara
发明人： Yoshio Fukutomi , Toru Nagara
IPC分类号： G11B7/00
CPC分类号： G11B7/1263 , G11B7/1356 , G11B7/1395
摘要： In an optical disk apparatus, transmittance and reflectance of a polarization beam splitter 13 to the S polarization and the P polarization of laser beams are adjusted so that a first polarization component level ratio in the laser beam received by a light receiver for reproducing signal 17 from a laser diode 11 via the polarization beam splitter 13, and a second polarization component level ratio in the laser beam received by a light receiver for monitoring light source 18 from the laser diode 11 via the polarization beam splitter 13 become equal or the difference between the first and the second polarization component level ratios becomes within a predetermined permissible range.
摘要翻译： 在光盘装置中，调整偏振光束分离器13与激光的S偏振和P偏振的透射率和反射率，使得由用于再现信号17的光接收器接收的激光束中的第一偏振分量电平比 通过偏振分束器13的激光二极管11和由受光器接收的用于经由偏振分束器13从激光二极管11监测光源18的激光束中的第二偏振分量电平比变得相等或者 第一和第二偏振分量电平比变得在预定的允许范围内。
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公开(公告)号：US20060231729A1
公开(公告)日：2006-10-19
申请号：US11407311
申请日：2006-04-18
申请人： Yoshio Fukutomi , Toru Nagara
发明人： Yoshio Fukutomi , Toru Nagara
摘要： A signal-detecting light-receiving device formed as an integrated circuit, which receives a light beam reflected from an optical recording medium, and which outputs a signal obtained from the received reflected light beam, through a current-output-type current amplifier circuit. The light-receiving device includes the following components: at least one resistor configured as a part of the integrated circuit, the at least one resistor being an output resistor used as a termination resistor for an output terminal of the light-receiving device, the output terminal being connected to an output of the current amplifier circuit; and a selecting circuit configured as a part of the integrated circuit, which controls the at least one resistor so as to enable/disable connection of the at least one resistor to the output terminal of the light-receiving device.
摘要翻译： 形成为集成电路的信号检测光接收装置，其接收从光记录介质反射的光束，并且通过电流输出型电流放大器电路输出从接收的反射光束获得的信号。 光接收装置包括以下部件：被配置为集成电路的一部分的至少一个电阻器，所述至少一个电阻器是用作光接收装置的输出端子的终端电阻器的输出电阻器，输出端 端子连接到电流放大器电路的输出端; 以及选择电路，其被配置为集成电路的一部分，其控制所述至少一个电阻器，以便使能/禁止所述至少一个电阻器与所述光接收装置的输出端子的连接。
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公开(公告)号：US07319221B2
公开(公告)日：2008-01-15
申请号：US11407311
申请日：2006-04-18
申请人： Yoshio Fukutomi , Toru Nagara
发明人： Yoshio Fukutomi , Toru Nagara
摘要： A signal-detecting light-receiving device formed as an integrated circuit, which receives a light beam reflected from an optical recording medium, and which outputs a signal obtained from the received reflected light beam, through a current-output-type current amplifier circuit. The light-receiving device includes the following components: at least one resistor configured as a part of the integrated circuit, the at least one resistor being an output resistor used as a termination resistor for an output terminal of the light-receiving device, the output terminal being connected to an output of the current amplifier circuit; and a selecting circuit configured as a part of the integrated circuit, which controls the at least one resistor so as to enable/disable connection of the at least one resistor to the output terminal of the light-receiving device.
摘要翻译： 形成为集成电路的信号检测光接收装置，其接收从光记录介质反射的光束，并且通过电流输出型电流放大器电路输出从接收的反射光束获得的信号。 光接收装置包括以下部件：被配置为集成电路的一部分的至少一个电阻器，所述至少一个电阻器是用作光接收装置的输出端子的终端电阻器的输出电阻器，输出端 端子连接到电流放大器电路的输出端; 以及选择电路，其被配置为集成电路的一部分，其控制所述至少一个电阻器，以便使能/禁止所述至少一个电阻器与所述光接收装置的输出端子的连接。
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公开(公告)号：US20050265200A1
公开(公告)日：2005-12-01
申请号：US11108534
申请日：2005-04-18
申请人： Yoshio Fukutomi , Toru Nagara
发明人： Yoshio Fukutomi , Toru Nagara
摘要： Disclosed herein is a laser noise cancel circuit for reducing laser noises in a reproduction system for an optical disk device including, a gain-variable amplifying noise cancel circuit for amplifying a monitor output signal for laser light, a first low-pass filter for extracting low frequency signal components of a monitor output signal for noise canceling, a second low-pass filter for extracting low frequency signal components, a negative return loop circuit for controlling a gain in the amplifying noise cancel circuit based on the low frequency signal components of the monitor output signal for noise canceling extracted as well as on the low frequency signal components of the reproduced high frequency signal extracted, to determine the low frequency signal component rate of the monitor output signal for noise canceling as identical to the low frequency signal component rate of the reproduced high frequency signal, and an arithmetic circuit for generating the reproduced high frequency signal with the laser noise components cancelled by canceling the laser noise components extracted from the monitor output signal for noise canceling with a low frequency signal component rate determined as identical to the low frequency signal component rate of the reproduced high frequency signal with the laser noise components of the reproduced high frequency signal.
摘要翻译： 这里公开了一种用于减少用于光盘装置的再现系统中的激光噪声的激光噪声消除电路，包括用于放大用于激光的监视器输出信号的增益可变放大噪声消除电路，用于提取低电平的第一低通滤波器 用于噪声消除的监视器输出信号的频率信号分量，用于提取低频信号分量的第二低通滤波器，用于基于监视器的低频信号分量来控制放大噪声消除电路中的增益的负返回环路 提取的噪声消除输出信号以及所提取的再现的高频信号的低频信号分量，以确定用于噪声消除的监视器输出信号的低频信号分量率与低频信号分量速率相同 再现的高频信号，以及用于产生再现的高频信号的运算电路 y信号，其中激光噪声分量通过消除从监视器输出信号提取的用于噪声消除的激光噪声分量被消除，其中低频信号分量速率被确定为与具有激光噪声的再现的高频信号的低频信号分量率相同 再生高频信号的分量。
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公开(公告)号：US20050135222A1
公开(公告)日：2005-06-23
申请号：US11005041
申请日：2004-12-07
申请人： Yoshio Fukutomi , Toru Nagara
发明人： Yoshio Fukutomi , Toru Nagara
CPC分类号： G11B7/1263
摘要： A laser noise elimination circuit raises the gain of a first TIA and at the same time reflected light from an optical disc of a laser beam is subjected to photoelectric conversion by means of a photo detector and a second TIA to obtain an RF signal. Then, the direct current component of the FPD signal obtained by photoelectric conversion of part of the laser beam by means of another photo detector and the first TIA is cut out by a high pass filter and then subtracted by a subtracter. The gain of the first TIA is raised in a read mode of operation for reading data from the optical disc and lowered in a write mode of operation for writing data onto the optical disc so as to always effectively eliminate only the laser noise from the RF signal and prevent the circuit from being saturated in a write mode.
摘要翻译： 激光噪声消除电路提高第一TIA的增益，并且同时来自激光束的光盘的反射光通过光电检测器和第二TIA进行光电转换以获得RF信号。 然后，通过另一光电检测器和第一TIA光电转换激光束获得的FPD信号的直流分量由高通滤波器切出，然后用减法器减去。 第一TIA的增益在用于从光盘读取数据的读取操作模式下升高，并且以写入数据到光盘的写入操作模式降低，以便始终有效地消除来自RF信号的激光噪声 并防止电路在写入模式下饱和。
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公开(公告)号：US07307930B2
公开(公告)日：2007-12-11
申请号：US10961161
申请日：2004-10-12
申请人： Toru Nagara , Yoshio Fukutomi
发明人： Toru Nagara , Yoshio Fukutomi
IPC分类号： B11B7/00
CPC分类号： G11B7/0903
摘要： An optical disk apparatus includes a digital signal processor, a photo-detector circuit, and a sample-and-hold circuit. By using a sampling-timing signal generated by the sampling-timing signal based on a sampling-timing signal transmitted from the digital signal processor to the photo-detector circuit through a flexible cable, the sample-and-hold circuit can be operated. Based on a sampling-timing signal dedicated for a side spot, the sample-and-hold circuit can be operated.
摘要翻译： 光盘装置包括数字信号处理器，光电检测器电路和采样和保持电路。 通过使用基于从数字信号处理器通过柔性电缆发送到光检测器电路的采样定时信号由采样定时信号产生的采样定时信号，可以操作采样保持电路。 基于专用于侧面点的采样定时信号，可以操作采样和保持电路。
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公开(公告)号：US07149232B2
公开(公告)日：2006-12-12
申请号：US11108534
申请日：2005-04-18
申请人： Yoshio Fukutomi , Toru Nagara
发明人： Yoshio Fukutomi , Toru Nagara
IPC分类号： H01S3/00
摘要： Disclosed herein is a laser noise cancel circuit for reducing laser noises in a reproduction system for an optical disk device including, a gain-variable amplifying noise cancel circuit for amplifying a monitor output signal for laser light, a first low-pass filter for extracting low frequency signal components of a monitor output signal for noise canceling, a second low-pass filter for extracting low frequency signal components, a negative return loop circuit for controlling a gain in the amplifying noise cancel circuit based on the low frequency signal components of the monitor output signal for noise canceling extracted as well as on the low frequency signal components of the reproduced high frequency signal extracted, to determine the low frequency signal component rate of the monitor output signal for noise canceling as identical to the low frequency signal component rate of the reproduced high frequency signal, and an arithmetic circuit for generating the reproduced high frequency signal with the laser noise components cancelled by canceling the laser noise components extracted from the monitor output signal for noise canceling with a low frequency signal component rate determined as identical to the low frequency signal component rate of the reproduced high frequency signal with the laser noise components of the reproduced high frequency signal.
摘要翻译： 这里公开了一种用于减少用于光盘装置的再现系统中的激光噪声的激光噪声消除电路，包括用于放大用于激光的监视器输出信号的增益可变放大噪声消除电路，用于提取低电平的第一低通滤波器 用于噪声消除的监视器输出信号的频率信号分量，用于提取低频信号分量的第二低通滤波器，用于基于监视器的低频信号分量来控制放大噪声消除电路中的增益的负返回环路 提取的噪声消除输出信号以及所提取的再现的高频信号的低频信号分量，以确定用于噪声消除的监视器输出信号的低频信号分量率与低频信号分量速率相同 再现的高频信号，以及用于产生再现的高频信号的运算电路 y信号，其中激光噪声分量通过消除从监视器输出信号提取的用于噪声消除的激光噪声分量被消除，其中低频信号分量速率被确定为与具有激光噪声的再现的高频信号的低频信号分量率相同 再生高频信号的分量。
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公开(公告)号：US08054725B2
公开(公告)日：2011-11-08
申请号：US10964625
申请日：2004-10-15
申请人： Toru Nagara , Yoshio Fukutomi
发明人： Toru Nagara , Yoshio Fukutomi
IPC分类号： G11B7/00
CPC分类号： G11B7/00456 , G11B7/123 , G11B7/1263 , G11B7/13
摘要： An optical disk apparatus for writing signals on a recording medium by irradiating the recording medium with a laser beam modulated based on the signals includes a first converting unit for converting a first reflected laser beam component from the recording medium into electrical signals; a second converting unit for converting a second reflected laser beam component into electrical signals; a first sample-and-hold unit for sampling and holding the electrical signals from the first converting unit; a second sample-and-hold unit for sampling and holding the electrical signals from the second converting unit; and transmitting devices for transmitting the held signals from the first and the second sample-and-hold units. The sampled signals are averaged, and the averaged signal is held in each of the first and the second sample-and-hold units during signal writing.
摘要翻译： 一种用于通过用基于信号调制的激光束照射记录介质来在记录介质上写入信号的光盘装置包括用于将来自记录介质的第一反射激光束分量转换为电信号的第一转换单元; 第二转换单元，用于将第二反射激光束分量转换成电信号; 第一采样保持单元，用于对来自第一转换单元的电信号进行采样和保持; 第二采样保持单元，用于对来自第二转换单元的电信号进行采样和保持; 以及用于发送来自第一和第二采样保持单元的保持信号的发送设备。 对采样信号进行平均，并且在信号写入期间将平均信号保持在第一和第二采样保持单元中的每一个中。
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