公开(公告)号：US5736896A

公开(公告)日：1998-04-07

申请号：US551913

申请日：1995-10-23

申请人： Haruyasu Sakishita ,  Hideaki Ishihara ,  Hirohiko Yamada

发明人： Haruyasu Sakishita ,  Hideaki Ishihara ,  Hirohiko Yamada

IPC分类号： F02D45/00 ,  G01L23/22 ,  H03H19/00

CPC分类号： H03H19/004 ,  G01L23/225

摘要： A signal processing circuit includes a signal selecting device operative for selecting and outputting one of plural input signals. A filter connected to the signal selecting device filters the signal selected by the signal selecting device with a changeable center frequency of a pass band of the filtering. A frequency changing device is operative for temporarily changing the center frequency when the signal selected by the signal selecting device is changed from one to another. The filter includes, for example, a switched-capacitor filter.

摘要翻译： 信号处理电路包括可选择并输出多个输入信号之一的信号选择装置。 连接到信号选择装置的滤波器用信号选择装置选择的信号以滤波的通带的可变中心频率进行滤波。 当由信号选择装置选择的信号从一个变化到另一个时，变频装置用于临时改变中心频率。 滤波器包括例如开关电容滤波器。

公开(公告)号：US6131073A

公开(公告)日：2000-10-10

申请号：US870732

申请日：1997-06-06

申请人： Yoshimitsu Honda ,  Hideaki Ishihara ,  Haruyasu Sakishita ,  Kouichi Maeda

发明人： Yoshimitsu Honda ,  Hideaki Ishihara ,  Haruyasu Sakishita ,  Kouichi Maeda

IPC分类号： H01L27/04 ,  G01R1/44 ,  G05F1/56 ,  H01L21/822 ,  H03K19/003

CPC分类号： G01R1/44

摘要： A power voltage of a power source circuit is produced by amplifying a threshold voltage difference of an operational amplifier by an amplification factor corresponding to a dividing ratio of a resistance dividing circuit. The power source circuit is integrated on a CMOS substrate together with a computer block. A plurality of analog switches are associated with the resistance dividing circuit to stabilize the power voltage of the power source circuit. One of these switches is selectively closed to change the dividing ratio of the resistance dividing circuit in accordance with actuation data stored in a control register.

摘要翻译： 电源电路的电源电压通过将运算放大器的阈值电压差放大到与电阻分割电路的分频比相对应的放大系数来产生。 电源电路与计算机块一起集成在CMOS衬底上。 多个模拟开关与电阻划分电路相关联，以稳定电源电路的电源电压。 这些开关中的一个选择性地闭合，以根据存储在控制寄存器中的致动数据改变电阻分割电路的分压比。

公开(公告)号：US5522254A

公开(公告)日：1996-06-04

申请号：US349000

申请日：1994-11-29

申请人： Koichi Kamabora ,  Koji Sakakibara ,  Kazuhiro Nakai ,  Hirohiko Yamada ,  Hideaki Ishihara ,  Haruyasu Sakishita

发明人： Koichi Kamabora ,  Koji Sakakibara ,  Kazuhiro Nakai ,  Hirohiko Yamada ,  Hideaki Ishihara ,  Haruyasu Sakishita

IPC分类号： G01L23/22

CPC分类号： G01L23/225

摘要： A knock sensing apparatus for an internal combustion engine which can detect a failure in a knock sensor signal system correctly even when a changeover operation due to hardware is performed at a place between a knock sensor and a band pass filter. In this knock sensing apparatus, the failure detection by a failure detecting circuit for detecting a failure in a signal system from knock sensors is invalidated for a predetermined period after one of the knock sensors has been changed over to the other knock sensor, or one of two kinds of pass bands of a band pass filter has been changed over to the other pass band, to prevent a decrease in failure detection accuracy due to the signal delaying action of the switched capacitor filter.

摘要翻译： 一种用于内燃机的爆震感测装置，即使在爆震传感器和带通滤波器之间的位置执行由于硬件的切换操作，也能正确地检测爆震传感器信号系统的故障。 在该爆震检测装置中，在爆震传感器中的一个已经转换到另一个爆震传感器之后，预定时间段内，用于检测来自爆震传感器的信号系统故障的故障检测电路的故障检测无效， 已经将带通滤波器的两种通带切换到另一个通带，以防止由于开关电容滤波器的信号延迟动作导致的故障检测精度的降低。