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    • 21. 发明授权
    • Amplifier circuit for optical disk drive
    • 用于光盘驱动器的放大器电路
    • US06818879B2
    • 2004-11-16
    • US10183367
    • 2002-06-28
    • Hiroshi YamaguchiMasaki Taniguchi
    • Hiroshi YamaguchiMasaki Taniguchi
    • H03F308
    • H03F3/08H03F3/45085H03F2203/45466H03G3/3084
    • An operational amplifier including a pair of differential input transistors is provided with a feedback resistor switching circuit and a variable current source. When a loaded optical disk is a DVD-ROM, the feedback resistor switching circuit reduces a gain of the operational amplifier and the variable current source selects a large current (of, for example, 1 mA) as a common bias current supplied to the differential input transistors. When the loaded optical disk is a DVD-RAM with low reflectance and low recording/reproducing speed, the feedback resistor switching circuit enhances the gain of the operational amplifier and the variable current source selects a small current (of, for example, 0.5 mA) as the common bias current.
    • 包括一对差分输入晶体管的运算放大器设置有反馈电阻器切换电路和可变电流源。 当加载的光盘是DVD-ROM时,反馈电阻器开关电路降低运算放大器的增益,并且可变电流源选择大电流(例如,1mA)作为提供给差分器的公共偏置电流 输入晶体管。 当装载的光盘是具有低反射率和低记录/再现速度的DVD-RAM时,反馈电阻器切换电路增强了运算放大器的增益,并且可变电流源选择小电流(例如,0.5mA) 作为常见的偏置电流。
    • 26. 发明授权
    • Semiconductor photodetector device
    • 半导体光电探测器
    • US07211829B2
    • 2007-05-01
    • US11059500
    • 2005-02-17
    • Hisatada YasukawaRyouichi ItoTakaki IwaiMasaki TaniguchiYasushi Jin
    • Hisatada YasukawaRyouichi ItoTakaki IwaiMasaki TaniguchiYasushi Jin
    • H01L27/15H01L31/113
    • H01L27/1443H01L31/0288H01L31/103Y02E10/50
    • A semiconductor photodetector device includes: a first semiconductor layer of a first conductivity type; and a second semiconductor layer of a second conductivity type formed on the first semiconductor layer and having a light-receiving region. The first semiconductor layer includes a first region containing an impurity of the first conductivity type at a high concentration and a second region formed on the first region and containing an impurity of the first conductivity type at a concentration lower than that of the first region. The second semiconductor layer includes a third region containing an impurity of the second conductivity type at a concentration higher than that of the second region and a fourth region formed on the third region and containing an impurity of the second conductivity type at a concentration higher than that of the third region.
    • 一种半导体光检测器件包括:第一导电类型的第一半导体层; 以及形成在第一半导体层上并具有光接收区域的第二导电类型的第二半导体层。 第一半导体层包括含有高浓度的第一导电类型的杂质的第一区域和形成在第一区域上并且含有浓度低于第一区域的浓度的第一导电类型杂质的第二区域。 第二半导体层包括含有浓度高于第二区域的第二导电类型的杂质的第三区域和形成在第三区域上的第四区域,并且含有浓度高于第二区域的浓度的第二导电类型的杂质。 的第三个地区。
    • 27. 发明申请
    • Amplifier unit and optical disc drive
    • 放大器单元和光盘驱动器
    • US20060202761A1
    • 2006-09-14
    • US11430241
    • 2006-05-09
    • Shinichi MiyamotoYousuke KuroiwaMasaya UedaHideo FukudaHiroshi YamaguchiMasaki Taniguchi
    • Shinichi MiyamotoYousuke KuroiwaMasaya UedaHideo FukudaHiroshi YamaguchiMasaki Taniguchi
    • H03F3/45
    • H03F3/3432H03F3/08H03F2200/78
    • An amplifier unit is provided, with which the need for manufacturing a photoelectric conversion IC in Bi-CMOS process is eliminated, and relatively low process cost of the photoelectric conversion IC is achieved. The input section of a buffer (the base of a transistor Q5) is connected with a plurality of patterns of phase compensation circuits each including a resistor and a capacitor connected in series. A bipolar transistor (Q6) is interposed between a positive power supply line and a capacitor (C2) forming a capacitance of the phase compensation circuit. By switching on/off the bipolar transistor (Q6), the capacitance value and resistance value of the phase compensation circuit are switched. Since the bipolar transistor (Q6) is interposed between the capacitor (C2) and the positive power supply line, base current (Isw) acting as a switch signal does not affect the amplifier unit.
    • 提供放大器单元,消除了在Bi-CMOS工艺中制造光电转换IC的需要,并且实现了光电转换IC的相对低的处理成本。 缓冲器(晶体管Q 5的基极)的输入部分与多个相位补偿电路相连,每个相位补偿电路均包括串联连接的电阻器和电容器。 在正电源线和形成相位补偿电路的电容的电容器(C 2)之间插入双极晶体管(Q6)。 通过接通/关断双极晶体管(Q 6),相位补偿电路的电容值和电阻值被切换。 由于双极晶体管(Q 6)插在电容器(C 2)和正电源线之间,所以作为开关信号的基极电流(Isw)不影响放大器单元。
    • 29. 发明授权
    • Passband-adjustable photo-detector for inverse photoemission spectroscopy
    • 用于逆光电子能谱的通带可调光电检测器
    • US5554844A
    • 1996-09-10
    • US404554
    • 1995-03-15
    • Hirofumi NamatameMasaki Taniguchi
    • Hirofumi NamatameMasaki Taniguchi
    • G01N23/227G01J1/02G01J1/04G01N21/62G01N23/225G01N21/00G02F1/01H01L31/10
    • G01N23/2251H01J2237/2445H01J2237/24485H01J2237/2516
    • A passband-adjustable photo-detector for inverse photoemission spectroscopy, in which an electron beam from an electron gun is applied onto a sample and a light reflected therefrom is converged, so as to effect photo-detection, wherein said photo-detector comprises a photo-electron multiplier, a LiF monocrystal window and a CaF.sub.2 monocrystal window individually deposited with a KCl thin film in the front of a photo-electron multiplier in the photo-detector, wherein said windows means are provided for arbitrarily setting the temperature from the vicinity of liquid nitrogen temperature to the order of 150.degree. C., a photo-electron multiplier having a first dinode deposited a KCl thin film on a surface thereof said photo-electron multiplier, and an output of the photo electron multiplier is connected with a pulse counter circuit through an amplifier, so as to measure anyone selected from the group consisting of light absorption property, window transmissibility and sensitivity as a bandpass filter.
    • 一种用于逆光电子发射光谱的通带可调光检测器,其中来自电子枪的电子束被施加到样品上并且从其反射的光会聚,以便进行光检测,其中所述光检测器包括照片 电子倍增器,在光电检测器中的光电子倍增器前面分别沉积有KCl薄膜的LiF单晶窗口和CaF 2单晶窗口,其中所述窗口装置用于任意设置温度从 液氮温度为150℃左右,具有第一个二极管的光电子倍增器在其表面上沉积有KCl薄膜,所述光电子倍增器,光电子倍增器的输出与脉冲计数器 电路通过放大器,以便测量从由光吸收特性,窗口传输性和灵敏度组成的组中选出的任何一个带通 过滤器