Gain switching circuit for preamplifier
    2.
    发明公开
    Gain switching circuit for preamplifier 有权
    VerstärkungsschaltkreisfürVorverstärker

    公开(公告)号:EP2161833A1

    公开(公告)日:2010-03-10

    申请号:EP09009347.7

    申请日:2003-07-30

    IPC分类号: H03G3/30 H03G1/00

    摘要: A gain switching circuit (3) that switches a conversion gain of a preamp (2) , which outputs a voltage signal upon amplifying an output current of a photo-detecting element (1) that converts a burst-form optical signal into an electrical signal and with which a series circuit, formed with a first resistor (6) and a first switching element (9) , and a series circuit, formed with a second resistor (7) and a second switching element (10) are connected in parallel to a feedback resistor (2B). The switching circuit further includes a gate signal generating circuit that generates, upon receiving an output of the pre-amplifier, a gate signal for a first and second operating unit.

    摘要翻译: 一种增益切换电路(3),其切换前置放大器(2)的转换增益,该放大器(2)的转换增益在放大光电检测元件(1)的输出电流时输出,该光检测元件将突发形式的光信号转换为电信号 与第一电阻器(6)和第一开关元件(9)形成的串联电路和形成有第二电阻器(7)和第二开关元件(10)的串联电路并联连接到 反馈电阻器(2B)。 开关电路还包括门信号发生电路,其在接收到前置放大器的输出时产生用于第一和第二操作单元的门信号。