Knock detection circuit
    2.
    发明公开
    Knock detection circuit 失效
    Klopfsensorschaltung。

    公开(公告)号:EP0271294A1

    公开(公告)日:1988-06-15

    申请号:EP87310683.5

    申请日:1987-12-04

    发明人: Mainprize, David

    IPC分类号: G06G7/186 F02P5/155

    摘要: A rectifying and integrating circuit, particularly in a knock-detection system for an internal combustion engine, comprises an operational amplifier OA, an integrat­ing capacitor C2 with one side connected to the amplifier output and its other side connected to the signal input of the amplifier, a first rectifying device D2 connecting the amplifier output to the one side (i.e. output side) of the integrating capacitor, and a second rectifying device D1 connecting the amplifier output to its signal input. The signal input current is balanced by feedback through one or other of the two paths D2, C2 and D1, depending on the polarity of the input. Integration occurs on one polarity in the absence of a rectifier amplifier preceding a separate integrator, errors due to input offset voltages of the rectifier amplifier are avoided.

    摘要翻译: 特别是在用于内燃机的爆震检测系统中的整流和积分电路包括运算放大器OA,积分电容器C2,其一侧连接到放大器输出端,另一侧连接到放大器的信号输入端, 将放大器输出连接到积分电容器的一侧(即,输出侧)的第一整流装置D2和将放大器输出连接到其信号输入的第二整流装置D1。 根据输入的极性,信号输入电流通过两个路径D2,C2和D1中的一个或另一个的反馈平衡。 在单独的积分器之前没有整流放大器的情况下,在一个极性上产生积分,避免了由于整流放大器的输入失调电压引起的误差。