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    • 22. 发明授权
    • Optical receiving apparatus and method
    • 光接收装置及方法
    • US06498670B2
    • 2002-12-24
    • US09119595
    • 1998-07-21
    • Katsuya YamashitaTakeshi IharaHiroshi Hamano
    • Katsuya YamashitaTakeshi IharaHiroshi Hamano
    • H04B1006
    • H04B10/6932H04L7/033
    • It is aimed at providing an optical receiving apparatus and an optical receiving method, which can assuredly receive and process signal lights having different transmission rates, by a simple and single device. To this end, the signal light received by the present optical receiving apparatus is converted into an electric signal by a light receiving element and thereafter sent to an equalizing amplifier whereby the signal is amplified. The transmission rate of this received signal is detected by a transmission rate detecting part, and a band of the equalizing amplifier is optimally controlled by an equalizing band controlling part, corresponding to the detected transmission rate. In case of adopting a PLL (phase-locked loop) circuit as a clock generating circuit, there is also controlled a band of a loop filter corresponding to the transmission rate detected by the transmission rate detecting part. Thus, there can be obtained an excellent reception characteristics, even when receiving signal lights having different transmission rates.
    • 旨在提供一种光接收装置和光接收方法,其可以通过简单且单一的装置可靠地接收和处理具有不同传输速率的信号灯。 为此,由光接收装置接收的信号光被光接收元件转换成电信号,然后发送到均衡放大器,由此信号被放大。 该接收信号的传输速率由传输速率检测部分检测,并且均衡放大器的频带被对应于检测到的传输速率的均衡频带控制部分最佳地控制。 在采用PLL(锁相环)电路作为时钟发生电路的情况下,还控制与由传输速率检测部分检测到的传输速率相对应的环路滤波器的频带。 因此,即使接收到具有不同传输速率的信号灯,也可以获得良好的接收特性。
    • 28. 发明授权
    • Polysaccharide derivative
    • 多糖衍生物
    • US06541614B1
    • 2003-04-01
    • US09926688
    • 2001-12-03
    • Atsushi NagasawaTomohito KitsukiTakeshi Ihara
    • Atsushi NagasawaTomohito KitsukiTakeshi Ihara
    • C07H1508
    • C08B37/00A61K8/73A61Q5/02A61Q19/00A61Q19/10C08B11/00C08B11/08C08B11/20C08B31/00C08B31/08C08B31/12C08B31/125
    • Polysaccharide derivatives derived from a polysaccharide or a derivative thereof by substituting a part or all of the hydrogen atoms of the hydroxyl groups of the polysaccharide or the derivative thereof with the groups represented by the following formula (1): —E1—(OA)n—E2—R  (1) wherein E1 represents a divalent saturated C1-6 hydrocarbon group which may be substituted with one or more hydroxyl groups or oxo groups, n stands for a number of from 8 to 300, n numbers of As may be the same or different and each independently represent a divalent saturated C1-6 hydrocarbon group, E2 represents an ether bond or an oxycarbonyl group, and R represents a C4-30 alkyl group which may be substituted with one or more hydroxyl groups, in which the H(s) of one or more hydroxy groups in each of said groups (1) may be further substituted with the groups (1); thickeners and emulsifiers comprising these polysaccharide derivatives; as well as aqueous compositions containing said polysaccharide derivatives. The polysaccharide derivatives of the present invention are excellent in water solubility and have such a rheological characteristic that the viscosity thereof increases at high temperatures, whereby they are very useful as a thickener exhibiting an excellent handling property at low temperatures and a sufficient thickening effect at high temperatures, as an emulsifier exhibiting an excellent emulsifying action allowing hydrophobic compounds to exist very stably in water, and also as a thickening and stabilizing agent for various toiletry products such as viscous bath preparations, massaging cosmetic preparations, shower preparations, skin care preparations, hair washing preparations, body washing preparations, garment detergents, garment finishing agents and hard surface cleaning agents.
    • 通过用下述式(1)表示的基团代替多糖或其衍生物的羟基的部分或全部的氢原子的一部分或全部来自多糖或其衍生物的多糖衍生物:其中E1表示二价饱和C1 可以被一个或多个羟基或氧代基取代的烃基,n表示数量为8至300,n数可以相同或不同,并且各自独立地表示二价饱和C 1-6烃 基团,E2表示醚键或氧羰基,R表示可被一个或多个羟基取代的C4-30烷基,其中每个所述基团中的一个或多个羟基的H(s) (1)可以进一步被基团(1)取代; 包含这些多糖衍生物的增稠剂和乳化剂; 以及含有所述多糖衍生物的含水组合物。本发明的多糖衍生物具有优异的水溶性,并且具有其粘度在高温下增加的流变特性,因此它们作为显示出优异处理性能的增稠剂是非常有用的 在低温下和在高温下具有充分的增稠效果,作为表现出优异的乳化作用的乳化剂,使疏水性化合物在水中非常稳定地存在,以及作为用于各种化妆品的增稠和稳定剂,例如粘稠浴剂,按摩化妆品 制剂,沐浴用品,护肤品,洗发剂,洗身剂,衣物洗涤剂,服装整理剂和硬表面清洁剂。
    • 29. 发明授权
    • Equalizing filter and control method for signal equalization
    • 均衡滤波器和信号均衡控制方法
    • US5963110A
    • 1999-10-05
    • US33238
    • 1998-03-03
    • Takeshi IharaHiroshi Hamano
    • Takeshi IharaHiroshi Hamano
    • H03H7/01H03H7/03
    • H04L25/03878
    • An equalizing filter with an optimized frequency response and improved reliability and quality, for equalizing a reception signal so as to regain its original waveform. The equalizing filter comprises a low-pass filter and a high-frequency booster circuit. With its limited passband, the low-pass filter rejects the noise components contained in the signal being processed. The high-frequency booster circuit has such a frequency response that exhibits a stepwise gain increase at high frequencies. Those two elements, composed of reliable passive components, are coupled in series to provide a combined frequency response that is optimized for the design of highly sensitive optical receivers. As integral part of the high-frequency booster circuit, the equalizing filter employs an inductor made of a bonding wire. To obtain a predetermined inductance with high accuracy, the bonding wire is divided into a plurality of sections, which are used to make a daisy chain connection that bridges between a plurality of lands disposed on the substrate.
    • 具有优化的频率响应和改进的可靠性和质量的均衡滤波器,用于均衡接收信号以恢复其原始波形。 均衡滤波器包括低通滤波器和高频增强电路。 低通滤波器通过其有限的通带来抑制正在处理的信号中包含的噪声分量。 高频升压电路具有这样的频率响应,其在高频时呈逐步增益。 这些由可靠的无源元件组成的两个元件串联耦合,以提供针对高灵敏度光接收器的设计而优化的组合频率响应。 作为高频升压电路的组成部分,均衡滤波器采用由接合线构成的电感器。 为了以高精度获得预定的电感,接合线被分成多个部分,这些部分用于形成桥接在设置在基板上的多个焊盘之间的菊花链连接。