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    A CMOS integrated interface circuit for processing the signal supplied by a capacitive sensor, particularly a piezoelectric accelerometric sensor
    1.
    发明公开
    A CMOS integrated interface circuit for processing the signal supplied by a capacitive sensor, particularly a piezoelectric accelerometric sensor 失效
    用于处理电容传感器信号的输出，特别是压电式加速度传感器的集成CMOS接口电路。

    公开(公告)号：EP0421953A1

    公开(公告)日：1991-04-10

    申请号：EP90830423.1

    申请日：1990-09-26

    申请人： MARELLI AUTRONICA S.p.A.

    发明人： Maloberti, Franco ,  Polito, Gino ,  Salerno, Franco

    IPC分类号： G01P15/09

    CPC分类号： G01P15/09 ,  F02B1/04

    摘要： The circuit comprises an amplitude limiter (3) made up with the use of two CMOS transistors (MP1; MP2) and a circuit (4) connected to the output of the amplitude limiter (S) for filtering the signal and changing its level. The filtering and level-changing circuit (4) is arranged, in particular, to achieve band-pass filtering in order to prevent aliasing effects which might arise during the sampling of the signal by subsequent switched-capacitance processing circuits, and to attenuate low-frequency components of the signal.

    摘要翻译： 限幅器（3）的电路包括由与使用两个CMOS晶体管（MP1，MP2）和电路（4）连接至所述限幅器（S），用于滤波的信号，并改变其电平的输出的。 过滤和标高变化电路（4）被布置，特别地，实现带通，以防止由随后切换电容处理电路的信号的采样过程中可能产生其中混叠效应滤波，并衰减低 该信号的频率分量。

    Device for detecting pinking, cylinder by cylinder, in an internal combustion engine
    3.
    发明公开
    Device for detecting pinking, cylinder by cylinder, in an internal combustion engine 失效
    Vorrichtung zum Erkennen des Klopfens，ZylinderfürZylinder，in einem Verbrennungsmotor。

    公开(公告)号：EP0421952A1

    公开(公告)日：1991-04-10

    申请号：EP90830422.3

    申请日：1990-09-26

    申请人： MARELLI AUTRONICA S.p.A.

    发明人： Polito, Gino ,  Salerno, Franco ,  Maloberti, Franco

    IPC分类号： G01L23/22 ,  F02P5/15

    CPC分类号： G01L23/225 ,  F02B1/04 ,  F02P5/1522 ,  Y02T10/46

    摘要： The device includes two channels (A, B) for detecting and processing the signal provided by an accelerometric sensor (S) operating in two frequency bands in which peaks indicative of pinking (knocking) may occur. In each combustion phase, a third channel (C) also connected to the sensor (S) provides a signal representative of the noise component of the signal from the sensor (S) in a frequency band in which the peaks do not occur.
    The signals provided by the first and second channels (A, B) are integrated and then compared with a reference signal generated in dependence on the noise component detected cylinder by cylinder. The device thus enables pinking to be detected cylinder by cylinder.

    摘要翻译： 该装置包括用于检测和处理由在两个频带中操作的加速度传感器（S）提供的信号的两个通道（A，B），其中可能发生指示粉红色（敲击）的峰值。 在每个燃烧阶段，也连接到传感器（S）的第三通道（C）在不发生峰值的频带中提供表示来自传感器（S）的信号的噪声分量的信号。 由第一和第二通道（A，B）提供的信号被积分，然后与根据由气缸检测的噪声分量产生的参考信号进行比较。 因此，该装置能够通过圆柱体检测滚筒的粉色。

    A MOS integrated circuit with switched capacitors, having a full-wave-rectifying and integrating function
    5.
    发明公开
    A MOS integrated circuit with switched capacitors, having a full-wave-rectifying and integrating function 失效
    MOS-IC mit geschalteten Kondensatoren und mit Vollwellengleichrichtungs- und Integrations-Funktion。

    公开(公告)号：EP0424331A1

    公开(公告)日：1991-04-24

    申请号：EP90830441.3

    申请日：1990-10-09

    申请人： MARELLI AUTRONICA S.p.A.

    发明人： Maloberti, Franco ,  Polito, Gino ,  Salerno, Franco

    IPC分类号： G01R19/22

    CPC分类号： G01R19/22 ,  F02B1/04

    摘要： A switched-capacitor circuit is described, which performs the functions of a full-wave rectifier and of an integrator and has a single operational amplifier (A1) and a comparator (CO1). The circuit is insensitive to the stray capacitances and offsets of the comparator (CO1) and the operational amplifier (A1). In particular, the input signal (V in ) is sampled during only one phase of the clock (CU) which pilots the operation of the switched-capacitance network.

    摘要翻译： 描述了开关电容器电路，其执行全波整流器和积分器的功能，并且具有单个运算放大器（A1）和比较器（CO1）。 电路对比较器（CO1）和运算放大器（A1）的杂散电容和偏移不敏感。 特别地，在仅导通开关电容网络的操作的时钟（CU）的一个相位期间，对输入信号（V in）进行采样。