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    An integrator with a switched capacitor and its use in a filter
    2.
    发明公开
    An integrator with a switched capacitor and its use in a filter 失效
    积分器geschaltetem Kondensator和seine Verwendung在einem过滤器。

    公开(公告)号：EP0030824A1

    公开(公告)日：1981-06-24

    申请号：EP80304374.4

    申请日：1980-12-04

    申请人： FUJITSU LIMITED

    发明人： Akihiko, Ito ,  Kazuhiro, Kobayashi ,  Hisami, Tanaka ,  Norio, Ueno

    IPC分类号： G06G7/186 ,  H03H19/00

    CPC分类号： H03H19/004 ,  G06G7/1865

    摘要： The switched capacitor comprises a capacitor CA 1 and a switching element S which can be periodically changed over for charging CA, with an input voltage V IN and for discharging the capacitor CA, to one input end (A) of an operational amplifier OP,. Another input end of OP, is connected to a reference potential (ground) and an integrating capacitor CB, is connected between an output end of OP, and the input end (A).
    Switching elements S 2 and S 3 are connected to input end (A) and the output end of OP 1 . The switching elements can be closed to make the potentials of the input end (A) and the output end of OP 1 equal to the reference potential (ground).
    This prevents potentials at input end (A) and the output end becoming unfixed when the integrator is out of operation, and ensures rapid stabilization of operation when the integrator is brought into operation.

    摘要翻译： 开关电容器包括电容器CA1和开关元件S1，开关元件S1可以周期性地改变以便用输入电压YIN对CA1充电，并且将电容器CA1放电到运算放大器OP1的一个输入端（A）。 0P1的另一个输入端连接到参考电位（地），并且积分电容器CB1连接在OP1的输出端和输入端（A）之间。开关元件S2和S3连接到输入端 A）和OP1的输出端。 开关元件可以闭合，使输入端（A）的电位和OP1的输出端等于参考电位（地）。 ... 这样可以防止输入端（A）的电位和输出端在积分器停止运行时变得不固定，并确保在积分器运行时快速稳定运行。