Photodetector with plural switched feedback resistors
    1.
    发明授权
    Photodetector with plural switched feedback resistors 有权
    具有多个开关反馈电阻的光电检测器

    公开(公告)号:US07022967B2

    公开(公告)日:2006-04-04

    申请号:US10648110

    申请日:2003-08-26

    IPC分类号: H01J40/14 H03F3/08

    CPC分类号: G01J1/44 G01J2001/4406

    摘要: A photodetector continuously measure quantity of light ranging from high intensity to low intensity at high speed. The photodetector comprises an operational amplifier, a photodiode connected to an inverting terminal of the operational amplifier for outputting a signal corresponding to quantity of light to be detected, a plurality of feedback resistors differentiated in each resistance value, an analog switch for selectively connecting input terminals thereof to which one ends of the feedback resistors are connected to an output terminal of the operational amplifier except the feedback resistor having the maximum resistance value, or connecting the input terminal thereof which is rendered in a non-connection state to the output terminal of the operational amplifier instead of the feedback resistor having the maximum resistance value, wherein the feedback resistor having the maximum resistance value is connected to the output terminal of the operational amplifier at its one end and to the inverting input terminal of the operational amplifier at its other end, and wherein the other ends of the other feedback resistors are connected to the inverting input terminal of the operational amplifier.

    摘要翻译: 光电探测器连续地测量从高强度到低强度的高光量。 光检测器包括运算放大器,连接到运算放大器的反相端的光电二极管,用于输出对应于待检测光量的信号,在每个电阻值中区分的多个反馈电阻;模拟开关,用于选择性地连接输入端 其中反馈电阻器的一端连接到除了具有最大电阻值的反馈电阻器之外的运算放大器的输出端子,或者将其处于非连接状态的输入端子连接到非连接状态的输出端子 运算放大器代替具有最大电阻值的反馈电阻器,其中具有最大电阻值的反馈电阻器在其一端连接到运算放大器的输出端,并在其另一端连接到运算放大器的反相输入端 ,并且其中另一端的另一端 反馈电阻连接到运算放大器的反相输入端。

    Optical spectrum analyzer
    2.
    发明授权
    Optical spectrum analyzer 有权
    光谱分析仪

    公开(公告)号:US08264682B2

    公开(公告)日:2012-09-11

    申请号:US13092305

    申请日:2011-04-22

    申请人: Atsushi Horiguchi

    发明人: Atsushi Horiguchi

    IPC分类号: G01J3/28

    CPC分类号: G01J3/18 G01J3/027

    摘要: An optical spectrum analyzer includes a diffraction-grating control unit configured to change an angle of a diffraction grating to change a wavelength of a dispersed light beam extracted from incident light, a calculator unit configured to calculate an angle of the diffraction grating such that the wavelength of the dispersed light beam has a sampling wavelength, and to store the data indicating the angle, a FIFO memory configured such that part of the data is inputted to it, for outputting the data at each reception of a trigger signal indicating timing of sampling, and an FIFO memory control unit configured to output the subsequent data to the FIFO memory, when a remaining data amount of the FIFO memory reaches a predetermined value or lower.

    摘要翻译: 光谱分析仪包括衍射光栅控制单元,被配置为改变衍射光栅的角度以改变从入射光提取的分散光束的波长;计算单元,被配置为计算衍射光栅的角度,使得波长 的分散光束具有采样波长,并且存储指示角度的数据,配置为使得部分数据被输入到其中的FIFO存储器,用于在每次接收指示采样定时的触发信号时输出数据, 以及FIFO存储器控制单元,被配置为当FIFO存储器的剩余数据量达到预定值或更低时,将后续数据输出到FIFO存储器。

    OPTICAL SPECTRUM ANALYZER
    3.
    发明申请
    OPTICAL SPECTRUM ANALYZER 有权
    光谱分析仪

    公开(公告)号:US20110261357A1

    公开(公告)日:2011-10-27

    申请号:US13092305

    申请日:2011-04-22

    申请人: Atsushi Horiguchi

    发明人: Atsushi Horiguchi

    IPC分类号: G01J3/28

    CPC分类号: G01J3/18 G01J3/027

    摘要: An optical spectrum analyzer includes a diffraction-grating control unit configured to change an angle of a diffraction grating to change a wavelength of a dispersed light beam extracted from incident light, a calculator unit configured to calculate an angle of the diffraction grating such that the wavelength of the dispersed light beam has a sampling wavelength, and to store the data indicating the angle, a FIFO memory configured such that part of the data is inputted to it, for outputting the data at each reception of a trigger signal indicating timing of sampling, and an FIFO memory control unit configured to output the subsequent data to the FIFO memory, when a remaining data amount of the FIFO memory reaches a predetermined value or lower.

    摘要翻译: 光谱分析仪包括衍射光栅控制单元,被配置为改变衍射光栅的角度以改变从入射光提取的分散光束的波长;计算单元,被配置为计算衍射光栅的角度,使得波长 的分散光束具有采样波长,并且存储指示角度的数据,配置为使得部分数据被输入到其中的FIFO存储器,用于在每次接收指示采样定时的触发信号时输出数据, 以及FIFO存储器控制单元,被配置为当FIFO存储器的剩余数据量达到预定值或更低时,将后续数据输出到FIFO存储器。