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    • 1. 发明授权
    • Digital to analog conversion method and system with the introduction and
later removal of dither
    • 数字到模拟转换的方法和系统与引入和以后去除抖动
    • US4686509A
    • 1987-08-11
    • US810975
    • 1985-12-19
    • Tetsuro ArakiHiroyuki Onda
    • Tetsuro ArakiHiroyuki Onda
    • H03M1/20H03M1/00H03M1/66
    • H03M1/0641
    • A digital data signal such as a digitized audio signal is time division multiplexed with a digital dither signal to provide a multiplex signal compound of the digital dither signal and a digital data/dither signal, the latter being an addition of the digital data and dither signals. Then the multiplex signal is converted from digital to analog form by one and the same digital to analog converter. The subsequent removal of the analog dither signal from the analog data/dither signal provides an analog data signal as a replica of the digital data signal. The use of the same converter for the conversion of both dither signal and data/dither signal from digital to analog form makes possible the maximum possible removal of the dither from the analog data/dither signal.
    • 诸如数字化音频信号的数字数据信号与数字抖动信号进行时分复用,以提供数字抖动信号和数字数据/抖动信号的多路复用信号混合,后者是数字数据和抖动信号的相加 。 然后,多路复用信号由数字模拟转换为同一个数模转换器。 随后从模拟数据/抖动信号中去除模拟抖动信号提供模拟数据信号作为数字数据信号的副本。 使用相同的转换器将抖动信号和数据/抖动信号从数字模式转换为模拟形式使得可以从模拟数据/抖动信号中最大程度地去除抖动。
    • 3. 发明授权
    • Analog to digital conversion method and system with the introduction and
later removal of dither
    • 模拟数字转换方法和系统,随后引入和删除抖动
    • US4700173A
    • 1987-10-13
    • US810973
    • 1985-12-19
    • Tetsuro ArakiHiroyuki Onda
    • Tetsuro ArakiHiroyuki Onda
    • H03M1/08H03M1/00H03M1/20
    • H03M1/0641
    • For the distortionless conversion of an audio or like data signal from analog to digital form as by pulse code modulation, the input data signal is time division multiplexed with an analog dither (white noise) signal to provide a multiplex signal composed of the analog dither signal and an analog data/dither signal, the latter being an addition of the analog data and dither signals. Then the multiplex signal is converted from analog to digital form by one and the same analog to digital converter. The subsequent removal of the digital dither component from the digital data/dither signal provides a digital data signal as a replica of the input analog data signal. The use of the same converter for the conversion of both dither signal and data/dither signal from analog to digital form makes possible the maximum possible removal of the dither from the digital data/dither signal.
    • 为了通过脉码调制将音频或类似数据信号从模拟到数字形式进行无失真转换,输入数据信号与模拟抖动(白噪声)信号进行时分复用,以提供由模拟抖动信号 以及模拟数据/抖动信号,后者是模拟数据和抖动信号的相加。 然后,多路复用信号由模数转换为数模转换器。 随后从数字数据/抖动信号中去除数字抖动分量提供数字数据信号作为输入模拟数据信号的副本。 使用相同的转换器将抖动信号和数据/抖动信号从模拟信号转换为数字形式使得可能从数字数据/抖动信号中最大程度地去除抖动。
    • 4. 发明授权
    • Digital to analog conversion system with the addition of dither to the
digital input
    • 数字到模拟转换系统,加上抖动到数字输入
    • US4644324A
    • 1987-02-17
    • US810974
    • 1985-12-19
    • Tetsuro ArakiHiroyuki Onda
    • Tetsuro ArakiHiroyuki Onda
    • H03M1/20H03M1/00H03M1/04H03M1/66
    • H03M1/201
    • A system for converting an audio or like data signal from digital to analog form, with the addition of dither (white noise) to the digital input, with or without the subsequent removal of the dither from the analog output, for the reduction of quantization noise. Included is a network of n adders, equal in number to the n bits of the coded data signal, for adding in bit parallel form the digital data signal and the digital dither signal. Generated by an analog dither generator, the dither signal is transformed by an analog to digital converter into an m bit coded digital output, m being less than n, prior to delivery to the adder network. Some, preferably all, of the m bits of the digital dither signal are each added to, for example, two different ones of the n bits of the digital data signal so that, for instance, an eight bits analog to digital converter can be used for the provision of a digital dither signal to be added to a 16 bits digital audio signal. The adder network is connected to a digital to analog converter for converting the bit parallel addition of the data and dither signals into analog form.
    • 一种用于将音频或类似数据信号从数字形式转换成模拟形式的系统,在数字输入端添加抖动(白噪声),伴随或不用随后从模拟输出中去除抖动,以减少量化噪声 。 包括与编码数据信号的n位数相等的n个加法器的网络,用于以数字数据信号和数字抖动信号的位并行形式相加。 由模拟抖动发生器产生的抖动信号由模拟数字转换器转换成m位编码的数字输出,m小于n,然后传送到加法器网络。 数字抖动信号的m位中的一些,优选地,全部每一个都被添加到例如数字数据信号的n位中的两个不同的位,使得例如可以使用8位模数转换器 用于提供要添加到16位数字音频信号的数字抖动信号。 加法器网络连接到数模转换器,用于将数据和抖动信号的位并行加法转换为模拟形式。
    • 5. 发明授权
    • Constant linear velocity optical disk apparatus having improved
circuitry for speed data access
    • 具有用于速度数据访问的改进电路的恒定线速度光盘装置
    • US5627811A
    • 1997-05-06
    • US488658
    • 1995-06-08
    • Tsutomu MoritaHiroyuki OndaMasasi TanakaKatsumi Aoyama
    • Tsutomu MoritaHiroyuki OndaMasasi TanakaKatsumi Aoyama
    • G11B19/28G11B7/085G11B19/20G11B19/247G11B19/26G11B7/00
    • G11B7/08505G11B19/2009G11B19/247G11B19/26
    • An optical disk apparatus includes a disk servo unit which generates a servo signal based on a data signal read from an optical disk. The servo signal is supplied to a disk motor to control a rotation of the motor so that a linear velocity of the disk is kept constant when data is read from or written onto the disk. The disk servo unit is connected to the motor when the data is read from or written onto the disk, so that the servo signal is supplied to the motor, and the disk servo unit is disconnected from the motor when a pickup jumps from a present track of the disk to a destination track thereof so that the supply of the servo signal to the motor is inhibited. A velocity change signal which enables the motor to increase or decrease a rotating speed of the motor is generated depending on which one of two directions of the track jump is specified by a direction signal. A time signal which defines an estimated time of the track jump required to change an angular velocity at the present track to an angular velocity at the destination track is generated. The optical disk apparatus supplies the velocity change signal to the motor during the estimated time.
    • 光盘装置包括:盘伺服单元,其基于从光盘读取的数据信号产生伺服信号。 伺服信号被提供给盘马达,以控制马达的旋转,使得当数据从盘读取或写入盘时,盘的线速度保持恒定。 当数据从盘读取或写入盘时,盘伺服单元连接到电动机,使得伺服信号被提供给电动机,并且当拾取器从当前轨迹跳跃时,盘伺服单元与电动机断开连接 的磁盘到目标磁道,从而禁止向电机提供伺服信号。 根据通过方向信号指定轨道跳跃的两个方向中的哪一个,使得电动机能够增大或减小电动机的转速的速度变化信号。 产生定义将目前轨道处的角速度改变为目的地轨道的角速度所需的轨道跳跃的估计时间的时间信号。 光盘装置在估计时间期间向马达提供速度改变信号。
    • 6. 发明授权
    • Electron multiplier with improved dynode geometry for reduced crosstalk
    • 电子倍增器,具有改进的倍增极几何形状,可减少串扰
    • US5481158A
    • 1996-01-02
    • US148280
    • 1993-11-08
    • Hisaki KatoSuenori KimuraKiyoshi NakatsugawaTsuguo UchinoItsuo OzawaHiroyuki Onda
    • Hisaki KatoSuenori KimuraKiyoshi NakatsugawaTsuguo UchinoItsuo OzawaHiroyuki Onda
    • H01J43/04H01J43/18H01J43/10
    • H01J43/045H01J43/18
    • The present invention relates to a linear multi-anode photomultiplier or electron multiplier on which a plurality of light beams to be measured or energy beams of electrons, ions and so forth are incident one-dimensionally. The object of the present invention is to prevent crosstalk between dynode arrays caused by leaking electrons. A transmission type photomultiplier is characterized in that the direction of secondary electron emission of the first-stage dynode of each dynode array is set in the opposite direction at 180.degree. from that of an adjacent dynode array. Then, adjacent dynode arrays will not oppose each other but are shifted from each other at a predetermined distance in the lateral direction. Accordingly, even if electrons leak from a gap between dynodes of a certain dynode array, the leaking electrons will not enter the adjacent dynode array, thereby preventing crosstalk.
    • 本发明涉及一种线性多阳极光电倍增管或电子倍增器,其中待测量的多个光束或电子,离子等的能量束一维地入射。 本发明的目的是防止由电子泄漏引起的多极阵列之间的串扰。 透射型光电倍增管的特征在于,将每个倍增电极阵列的第一级倍增电极的二次电子发射方向设定为与相邻的倍增极阵列的方向相反的方向为180°。 然后,相邻的倍增电极阵列不会彼此相对,而是在横向上以预定距离彼此偏移。 因此,即使电子从某个倍增电极阵列的倍增电极之间的间隙泄漏,泄漏的电子将不会进入相邻的倍增极阵列,从而防止串扰。
    • 8. 发明授权
    • Optical disk device
    • 光盘装置
    • US06310845B1
    • 2001-10-30
    • US09274921
    • 1999-03-23
    • Junichi KanenagaHiroyuki Onda
    • Junichi KanenagaHiroyuki Onda
    • G11B700
    • G11B20/10009G11B7/0037G11B19/06G11B19/26G11B20/1816
    • An optical disk device has a unit for counting data read errors from an optical disk and a unit for reducing a playback speed of an optical disk. When a number of data read errors occurring in a predetermined period of time exceeds a predetermined value the playback speed reducing unit reduces the playback speed of the optical disk. As a result, repetition of error detection and consequent reduction in playback speed with each data read command when reading defective sectors of an optical disk can be prevented and the time required for error detection and speed reduction thereby eliminated, greatly improving overall average playback speed.
    • 光盘装置具有用于从光盘计数数据读取错误的单元和用于降低光盘的重放速度的单元。 当在预定时间段内发生的多个数据读取错误超过预定值时,重放速度降低单元降低光盘的播放速度。 结果,可以防止在读取光盘的缺陷扇区时利用每个数据读取命令重复错误检测和随之而来的重放速度的降低,从而消除了错误检测和速度降低所需的时间,从而大大提高了总体平均回放速度。