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    • 3. 发明授权
    • Process for production of surface-modified polymer structures
    • 表面改性聚合物结构的制造方法
    • US09029474B2
    • 2015-05-12
    • US12450778
    • 2008-04-23
    • Masaaki OzawaKeisuke OdoiHironori AtarashiKei-ichi AkaboriToshihiko NagamuraKeiji Tanaka
    • Masaaki OzawaKeisuke OdoiHironori AtarashiKei-ichi AkaboriToshihiko NagamuraKeiji Tanaka
    • C08L51/00C08L41/00C08J7/12C08L101/00
    • C08J7/12C08L101/005
    • The present invention relates to a process for producing a polymer structure comprising: mixing and unifying a matrix polymer made of a linear polymer and a highly-branched polymer having hydrophilic functional groups at molecular ends and to form a structure containing the matrix polymer and the highly-branched polymer; and subjecting the obtained structure to either immersion in water and/or a hydrophilic solvent or exposure to an atmosphere of vapor of water and/or a hydrophilic solvent at a temperature ranging from a temperature lower than Tg of the matrix polymer by 30° C. to decomposition temperature of the matrix polymer; wherein the hydrophilic functional groups at the molecular ends of the highly-branched polymer are distributed in outermost surface of the polymer structure at an enhanced density. The present invention also relates to a process for producing a polymer structure in which vinyl polymer chains are grafted to at least a part of the hydrophilic functional groups.
    • 本发明涉及一种聚合物结构体的制造方法,其特征在于,在分子末端将由线性聚合物构成的基质聚合物和具有亲水性官能团的高支化聚合物混合均匀并形成含有基体聚合物的结构, 支链聚合物 并将得到的结构物浸入水和/或亲水性溶剂中或在低于基体聚合物的Tg的温度范围内暴露于水和/或亲水性溶剂的气体的气氛中30℃。 到基体聚合物的分解温度; 其中高度支化聚合物的分子末端的亲水官能团以增强的密度分布在聚合物结构的最外表面。 本发明还涉及其中乙烯基聚合物链接枝至至少一部分亲水官能团的聚合物结构的方法。
    • 4. 发明授权
    • LD driver with an improved falling edge of driving signal and optical transmitter providing the same
    • LD驱动器具有改善的下降沿驱动信号和光发射机提供相同的功能
    • US08301033B2
    • 2012-10-30
    • US12752782
    • 2010-04-01
    • Keiji Tanaka
    • Keiji Tanaka
    • H04B10/04
    • H01S5/042H01S5/0428
    • An LD driver to generate an asymmetrical driving current with a relatively faster falling edge and an optical transmitter having the LD driver are disclosed. The LD driver includes a primary driver and the sub-driver connected in parallel to the primary driver. The primary driver converts the input signal or the delayed signal delayed from the input signal into the primary current. The sub-driver generates a symmetrical current tracing the input or the delayed signal, and an asymmetrical current formed by the OR operation between the input and delayed signals. The driving current is formed by adding the primary current, the symmetrical current and the asymmetrical current.
    • 公开了一种用于产生具有相对较快下降沿的不对称驱动电流的LD驱动器和具有LD驱动器的光发射器。 LD驱动器包括主驱动器和与主驱动器并联连接的副驱动器。 主驱动器将输入信号或从输入信号延迟的延迟信号转换为初级电流。 子驱动器产生对称电流跟踪输入或延迟信号,以及由输入和延迟信号之间的或运算形成的非对称电流。 通过增加一次电流,对称电流和不对称电流来形成驱动电流。
    • 6. 发明授权
    • Optical receiver
    • 光接收机
    • US07912380B2
    • 2011-03-22
    • US11416389
    • 2006-05-03
    • Katsumi UesakaKeiji Tanaka
    • Katsumi UesakaKeiji Tanaka
    • H04B10/06
    • H04B10/66H04B10/0799
    • The present invention provides an optical receiver able to monitor the level of the optical input signal in accurate even when the level is quite small. The optical receiver comprises a photodiode to generate a photocurrent Ipd, a current mirror circuit to reflect the photocurrent into a mirrored current Imon, a current-to-voltage converter to convert the mirrored current Imon to a voltage signal, switch to connect/cut the current mirror circuit with the current-to-voltage converter, and a correction unit for subtracting a signal when the switch is connected from a signal when the switch is cut.
    • 本发明提供一种即使当该电平相当小时也能够准确地监视光输入信号的电平的光接收器。 光接收器包括光电二极管以产生光电流Ipd,将光电流反射成镜像电流Imon的电流镜电路,用于将镜像电流Imon转换成电压信号的电流 - 电压转换器,切换到连接/切割 具有电流 - 电压转换器的电流镜电路,以及用于当开关切断时从信号连接开关时减去信号的校正单元。
    • 8. 发明授权
    • Optical receiver with monitoring unit and a method for detecting consecutive identical state of optical signal
    • 具有监控单元的光接收机和用于检测光信号的连续相同状态的方法
    • US07751725B2
    • 2010-07-06
    • US11500325
    • 2006-08-08
    • Keiji Tanaka
    • Keiji Tanaka
    • H04B10/06H04B10/08
    • H04B10/66
    • The present invention provides an optical receiver that includes a monitoring unit with a function to prevent the unit from misjudging of the loss-of-signal state. In particular, the present invention is applicable to the monitoring unit that receives the signal to be judged from the processing unit posterior to the optical converting unit that couples with the processing unit via the capacitor. The signal reflects the second or higher order response lag due to the coupling capacitor. The monitoring unit of the invention generates the loss-of-alarm signal when the signal is continuously smaller than the first reference by a preset time and continuously greater than the second reference by the present time.
    • 本发明提供一种光接收机,其包括具有防止该单元误信号状态失调的功能的监视单元。 特别地,本发明可应用于从经由电容器与处理单元耦合的光转换单元后面的处理单元接收要判断的信号的监视单元。 信号反映了由于耦合电容器引起的第二或更高阶响应滞后。 本发明的监视单元当信号连续小于第一参考预定时间并连续地大于当前时间的第二参考值时,产生报警信号。
    • 9. 发明授权
    • Optical receiver applicable to multiple transmission speed
    • 光接收机适用于多种传输速度
    • US07668469B2
    • 2010-02-23
    • US11411224
    • 2006-04-26
    • Seigo FurudateKeiji Tanaka
    • Seigo FurudateKeiji Tanaka
    • H04B10/06
    • H04B10/66
    • The present invention provides an optical receiver that enables to vary the sensitivity depending on the transmission speed. The optical receiver provides a photodiode to generate the photocurrent, the pre-amplifier to convert the photocurrent to the voltage signal, the lead pin to supply the bias voltage to the photodiode, and the control block to generate the switching signal for varying the current-to-voltage conversion efficiency and the frequency bandwidth of the pre-amplifier based on the control signal. The control signal is commonly provided from the lead pin through which the bias voltage is applied. The control block interprets the signal applied to the lead pin and generates the switching signal.
    • 本发明提供一种能够根据传输速度改变灵敏度的光接收机。 光接收器提供光电二极管以产生光电流,前置放大器将光电流转换为电压信号,引脚引脚将偏置电压提供给光电二极管,控制块产生开关信号, 基于控制信号的前置放大器的电压转换效率和频率带宽。 控制信号通常由施加偏置电压的引脚引脚提供。 控制块解释施加到引脚引脚的信号并产生开关信号。