公开(公告)号：US06876707B2

公开(公告)日：2005-04-05

申请号：US09740666

申请日：2000-12-19

申请人： Akira Mashimo ,  Keishi Ueno

发明人： Akira Mashimo ,  Keishi Ueno

IPC分类号： G06F1/06 ,  G11B20/14 ,  H03D3/00 ,  H03D3/04 ,  H04L25/34

CPC分类号： H03D3/04

摘要： A signal processing circuit generating a digital signal based on an input pulse signal is provided, which circuit includes a clock pulse output circuit which outputs clock pulses having one of positive and negative polarities for a period which includes a pulse of the input pulse signal, a counter circuit which counts the clock pulses, and an output circuit which outputs the digital signal based on a counted value of the counter circuit.

摘要翻译： 提供了基于输入脉冲信号产生数字信号的信号处理电路，该电路包括时钟脉冲输出电路，时钟脉冲输出电路在包括输入脉冲信号的脉冲的周期内输出具有正极性和负极性之一的时钟脉冲， 计数时钟脉冲的计数器电路，以及基于计数器电路的计数值输出数字信号的输出电路。

公开(公告)号：US5535183A

公开(公告)日：1996-07-09

申请号：US346002

申请日：1994-11-29

申请人： Tohru Miura ,  Mitsumasa Kubo ,  Akira Mashimo

发明人： Tohru Miura ,  Mitsumasa Kubo ,  Akira Mashimo

IPC分类号： G11B7/085 ,  G11B19/20 ,  G11B19/24 ,  G11B19/28 ,  G11B20/14 ,  G11B21/08 ,  G11B27/10 ,  G11B7/00

CPC分类号： G11B19/20 ,  G11B19/24 ,  G11B20/1403 ,  G11B27/105 ,  G11B7/08529 ,  G11B2020/10916 ,  G11B2220/213 ,  G11B2220/2545

摘要： An optical disk device generating reproduced data based on a reproduced digital signal which is derived by tracking a track on an optical disk with an optical pickup is shown. A bit-frequency-information generation unit measures a bit frequency of the reproduced digital signal after transition of the optical pickup in a seek operation, and generates measured-bit-frequency information which indicates a measured bit frequency measured thereby. In a bit-frequency setting unit, if there is a difference between the measured bit frequency and a specified bit frequency, the measured-bit-frequency information is corrected so as to adjust the bit frequency of the reproduced digital signal to the specified bit frequency by a given amount of correction, and is produced as setting-bit-frequency information. And a PLL circuit generates a synchronization clock which is phase synchronized to the reproduced digital signal and is used for generation of the reproduced data by means of setting the bit frequency indicated by the setting-bit-frequency information to a free-run frequency of the PLL circuit.

摘要翻译： 示出了基于通过用光学拾取器跟踪光盘上的轨道导出的再现数字信号来生成再现数据的光盘装置。 比特频率信息生成单元在搜索操作中测量光学拾取器的转换之后的再现的数字信号的比特频率，并且生成指示由此测量的测量的比特频率的测量比特频率信息。 在位频设置单元中，如果测量的比特频率和指定比特频率之间存在差异，则校正测量比特频率信息，以便将再现的数字信号的比特频率调整到指定的比特频率 通过给定量的校正，并且被产生为设置位频率信息。 并且PLL电路产生与再现的数字信号相位同步的同步时钟，并且通过将由设置位频率信息指示的位频率设置为自由运行频率而用于生成再现数据 PLL电路。

公开(公告)号：US5177727A

公开(公告)日：1993-01-05

申请号：US514423

申请日：1990-04-25

申请人： Akira Mashimo

发明人： Akira Mashimo

IPC分类号： G11B7/007 ,  G11B7/09 ,  G11B7/125 ,  G11B7/14 ,  G11B7/24 ,  G11B7/00 ,  G11B3/70

CPC分类号： G11B7/125 ,  G11B7/0901 ,  G11B7/14 ,  G11B7/24082

摘要： An optical disk includes a recording surface and a guide track which is a groove formed on the recording surface, and the edge lines of the groove has a wave shape that changes cyclically in a direction of a radius. An optical disk apparatus includes a first laser, a second laser, a first and second optical sensors which detect the reflected beams obtained by reflecting the light beams from the first and second lasers on the recording surface. The optical disk also includes first and second signal extraction circuits extracting signals having a frequency component corresponding to the wave shape of the edge line of the groove from the detection signals from the first and second optical sensors, a tracking controller controlling positions in a direction of the radius of the first and second lasers on the basis of the signals from the first and second extraction circuits, and a recording and reproducing unit for recording and reproducing on and from the optical disk.

摘要翻译： 光盘包括记录表面和作为形成在记录表面上的凹槽的导轨，并且凹槽的边缘线具有在半径方向上周期性地变化的波形。 光盘装置包括第一激光器，第二激光器，第一和第二光学传感器，其检测通过反射来自记录表面上的第一和第二激光器的光束而获得的反射光束。 光盘还包括第一和第二信号提取电路，从第一和第二光学传感器的检测信号中提取具有与沟槽边缘线的波形相对应的频率分量的信号，跟踪控制器控制方向上的位置 基于来自第一和第二提取电路的信号的第一和第二激光器的半径，以及用于在光盘上记录和再现光盘的记录和再现单元。

公开(公告)号：US5132957A

公开(公告)日：1992-07-21

申请号：US426789

申请日：1989-10-25

申请人： Akira Mashimo

发明人： Akira Mashimo

IPC分类号： G11B7/004 ,  G11B20/06 ,  G11B20/08 ,  H04N5/92 ,  H04N5/95

CPC分类号： G11B7/004 ,  G11B20/06 ,  G11B20/08 ,  H04N5/92 ,  H04N5/95

摘要： An information signal recording and reproducing system for recording and reproducing an information signal on and from a recording medium comprises a modulation circuit for modulating the information signal to form a modulated signal involving a number of pulses, a first frequency divider triggered responsive to a leading edge of the pulses in the modulated signal to produce a first frequency-divided signal having a frequency substantially lower than that of the modulated signal, a second frequency divider triggered responsive to a trailing edge of the pulses in the modulated signal to produce a second frequency-divided signal having a frequency substantially lower than that of the modulated signal, a recording device for recording the first and second frequency-divided signals on the recording medium, a reproducing device for detecting the first and second frequency-divided signals recorded on the recording medium to produce a first reproduced frequency-divided signal and a second reproduced frequency-divided signal, a synthesizing circuit supplied with the first and second reproduced frequency-divided signals to produce a synthetic modulated signal corresponding to the modulated signal by performing an exclusive-or operation of the first and second frequency-divided signals, and a demodulating circuit supplied with the synthetic modulated signal to produce a reproduced information signal.

摘要翻译： 一种用于在记录介质上记录和再现信息信号的信息信号记录和再现系统包括调制电路，用于调制信息信号以形成涉及多个脉冲的调制信号，响应于前沿触发的第一分频器 的调制信号中的脉冲以产生具有基本上低于调制信号频率的频率的第一分频信号，第二分频器响应于调制信号中的脉冲的后沿而触发，以产生第二频分复用信号， 具有基本上低于调制信号的频率的分频信号，用于在记录介质上记录第一和第二分频信号的记录装置，用于检测记录在记录介质上的第一和第二分频信号的再现装置 以产生第一再现分频信号和第二代表 合成电路，其被提供有第一和第二再现分频信号，以通过执行第一和第二分频信号的异或运算来产生与调制信号相对应的合成调制信号，以及 解调电路提供合成调制信号以产生再现的信息信号。

公开(公告)号：US5124675A

公开(公告)日：1992-06-23

申请号：US584176

申请日：1990-09-18

申请人： Tomokazu Komazaki ,  Katsuhiko Gunji ,  Norio Onishi ,  Ichiro Iwase ,  Akira Mashimo

发明人： Tomokazu Komazaki ,  Katsuhiko Gunji ,  Norio Onishi ,  Ichiro Iwase ,  Akira Mashimo

IPC分类号： H01P1/205

CPC分类号： H01P1/2056

摘要： An LC-type dielectric filter which includes strip lines on a dielectric plate forming distributed constant type resonators. The strip lines and other elements of the filter, such as coupling capacitances are plated onto the dielectric plate as printed circuits to realize a small, high-Q dielectric filter which is suitable for mass-production.

摘要翻译： 一种LC型介质滤波器，其在形成分布常数型谐振器的电介质板上包括带状线。 将滤波器的带状线和其它元件（例如耦合电容）作为印刷电路电镀在电介质板上，以实现适合于批量生产的小型高Q介质滤波器。

公开(公告)号：US4813034A

公开(公告)日：1989-03-14

申请号：US035760

申请日：1987-04-08

申请人： Akira Mashimo

发明人： Akira Mashimo

IPC分类号： G11B7/125 ,  G11B7/00 ,  H01S3/13

CPC分类号： G11B7/126

摘要： An optical disc recording apparatus comprises a light generating source for generating a recording light beam, an open loop circuit for controlling an amplitude of an angular modulated information signal responsive to a power setting signal indicative of a radial position of the recording light beam on the optical disc, a detector circuit for detecting a quantity of light of the recording light beam and for producing a D.C. signal within an output detection signal which is obtained by subjecting the detected quantity of light to a photoelectric conversion, a control circuit for variably controlling a level of the D.C. signal from the detecting circuit depending on the radial position of the recording light beam on the optical disc and according to a preset characteristic, and an adder for adding an output D.C. signal level of the control circuit and an output signal of the open loop circuit and for supplying an added signal to the light generating source so as to control a quantity of light of the recording light beam generated thereby. The D.C. signal from the detecting circuit is controlled by a closed loop circuit comprising the detecting circuit, the control circuit and the adder.

摘要翻译： 光盘记录装置包括用于产生记录光束的光产生源，用于响应于指示记录光束在光学上的径向位置的功率设置信号来控制角度调制信息信号的幅度的开环电路 光盘，检测电路，用于检测记录光束的光量，并产生通过使检测到的光量进行光电转换而获得的输出检测信号内的直流信号，用于可变地控制电平的控制电路 根据记录光束在光盘上的径向位置和根据预置特性的来自检测电路的DC信号，以及用于将控制电路的输出DC信号电平和开路的输出信号相加的加法器 并且用于向光产生源提供附加的信号以便控制数量 由此产生的记录光束的光。 来自检测电路的直流信号由包括检测电路，控制电路和加法器的闭环电路控制。

公开(公告)号：US4796097A

公开(公告)日：1989-01-03

申请号：US68016

申请日：1987-06-26

申请人： Akira Mashimo

发明人： Akira Mashimo

IPC分类号： G11B7/00 ,  G11B7/0045 ,  H04N5/85 ,  H04N5/91 ,  H04N9/83 ,  H04N9/85 ,  H04N9/80

CPC分类号： H04N9/83 ,  H04N5/85

摘要： An optical disc recording apparatus comprises a multiplexing circuit for frequency-division-multiplexing an FM luminance signal and the frequency converted carrier chrominance signal with a variable frequency-division-multiplexing ratio so that a frequency-division-multiplexing ratio of the frequency converted carrier chrominance signal with respect to the FM luminance signal becomes greater approximately proportionally to a relative linear velocity between an optical disc which rotates at the constant angular velocity and a laser beam which scans the optical disc, a limiter for converting an output frequency division multiplexed signal of the multiplexing circuit into a square wave having a constant amplitude, an amplitude varying circuit for varying an amplitude of the output square wave of the limiter approximately proportionally to the relative linear velocity, and a recording circuit including a laser light source for generating the laser beam responsive to an output signal of the amplitude varying circuit.

摘要翻译： 一种光盘记录装置，包括用于对FM亮度信号进行频分复用的多路复用电路和具有可变频分复用率的频率转换载波色度信号，使得频率转换载波色度的频分复用比 相对于FM亮度信号的信号与以恒定角速度旋转的光盘与扫描光盘的激光束之间的相对线速度近似成比例地变大，限幅器用于将输出频分复用信号 多路复用电路成为具有恒定振幅的方波;幅度变化电路，用于大致与所述相对线速度成比例地改变所述限幅器的输出方波的振幅;以及记录电路，包括用于产生所述激光束的激光光束 到该输出信号 振幅变化电路。

公开(公告)号：US08149026B2

公开(公告)日：2012-04-03

申请号：US12826317

申请日：2010-06-29

申请人： Yasukuni Inagaki ,  Akira Mashimo

发明人： Yasukuni Inagaki ,  Akira Mashimo

IPC分类号： H03B1/00

CPC分类号： G06F13/4072 ,  H04L25/028

摘要： A driver circuit includes an output section; a voltage-dividing section configured to divide a first voltage at a coupling point between the output section and a termination resistor; a comparison section configured to compare a voltage difference with one of the first voltage and a second voltage, the voltage difference being a difference between the second voltage at a coupling point between the termination resistor and a transmission path and a third voltage output from the voltage-dividing section; and an adjustment section configured to adjust a voltage division ratio of the voltage-dividing section on the basis of the comparison result obtained in the comparison section.

摘要翻译： 驱动器电路包括输出部分; 分压部，被配置为在输出部和终端电阻之间的耦合点处分割第一电压; 比较部，被配置为将电压差与所述第一电压和第二电压中的一个进行比较，所述电压差是所述终端电阻器和传输路径之间的耦合点处的所述第二电压与从所述电压输出的第三电压之间的差 分割段 以及调整部，其基于比较部中得到的比较结果，调整分压部的分压比。

公开(公告)号：US20110006812A1

公开(公告)日：2011-01-13

申请号：US12826317

申请日：2010-06-29

申请人： Yasukuni INAGAKI ,  Akira Mashimo

发明人： Yasukuni INAGAKI ,  Akira Mashimo

IPC分类号： H03B1/00

CPC分类号： G06F13/4072 ,  H04L25/028

摘要： A driver circuit includes an output section; a voltage-dividing section configured to divide a first voltage at a coupling point between the output section and a termination resistor; a comparison section configured to compare a voltage difference with one of the first voltage and a second voltage, the voltage difference being a difference between the second voltage at a coupling point between the termination resistor and a transmission path and a third voltage output from the voltage-dividing section; and an adjustment section configured to adjust a voltage division ratio of the voltage-dividing section on the basis of the comparison result obtained in the comparison section.

摘要翻译： 驱动器电路包括输出部分; 分压部，被配置为在输出部和终端电阻之间的耦合点处分割第一电压; 比较部，被配置为将电压差与所述第一电压和第二电压中的一个进行比较，所述电压差是所述终端电阻器和传输路径之间的耦合点处的所述第二电压与从所述电压输出的第三电压之间的差 分割段 以及调整部，其基于比较部中得到的比较结果，调整分压部的分压比。

公开(公告)号：US07817527B2

公开(公告)日：2010-10-19

申请号：US11796538

申请日：2007-04-26

申请人： Akira Mashimo

发明人： Akira Mashimo

IPC分类号： G11B7/24

CPC分类号： G11B7/0045 ,  G11B7/00736 ,  G11B7/1267 ,  G11B7/24082 ,  G11B2007/0013

摘要： Recording of data into a multilayer optical disk and reliable reproduction of the data are enabled. When user data are recorded on a multilayer optical disk having a first layer L0 and a second layer L1, the second layer L1 is formatted beforehand, to thus record dummy data. Subsequently, the user data are recorded into the first layer L0. Even after completion of recording of the user data at some point in the first layer L0, an area of the second layer L1 located immediately above or below a recorded area of the first layer L0 remains in a recorded state at all times. Compatibility with a play-only disk is maintained, and the play-only drive can reproduce the user data immediately after recording of the data.

摘要翻译： 将数据记录到多层光盘中并可靠地再现数据。 当将用户数据记录在具有第一层L0和第二层L1的多层光盘上时，预先格式化第二层L1，从而记录虚拟数据。 随后，将用户数据记录到第一层L0中。 即使在第一层L0中的某一点记录用户数据之后，位于第一层L0的记录区域的正上方或下方的第二层L1的区域始终保持在记录状态。 与仅播放磁盘的兼容性保持不变，只播放驱动器可以在记录数据后立即再现用户数据。