公开(公告)号：US5460028A

公开(公告)日：1995-10-24

申请号：US341230

申请日：1994-12-05

申请人： Peter Werner ,  Hermann Hemminger ,  Beate Glockner ,  Gerard Byrne ,  Stephan Johne

发明人： Peter Werner ,  Hermann Hemminger ,  Beate Glockner ,  Gerard Byrne ,  Stephan Johne

IPC分类号： G01N27/409 ,  F02D41/14 ,  F02D41/24 ,  G01N27/26 ,  F02B3/08

CPC分类号： F02D41/28 ,  F02D41/1493 ,  F02D41/1456

摘要： The invention is directed to a circuit for conditioning the output signal of a measuring sensor for further processing in a control apparatus which has a fixed ground potential which does not necessarily correspond to the ground potential of the measuring sensor. A conditioning circuit is provided which can be integrated on a chip and has the following characteristics. The conditioning circuit compensates for the fluctuating ground offset between exhaust gas probe and control apparatus ground when utilizing an exhaust gas probe burdened with a potential. The circuit arrangement includes an external circuit which can be changed to influence the input signal to the conditioning circuit. With this changeable external circuit, the output signal of the circuit arrangement can be so modified that the control apparatus outputs an output voltage with offset and an output voltage without offset. In the case of the external circuit for an output voltage without offset, an offset is impressed upon the input voltage which is then again subtracted at the output with an amplification factor so that the absolute value of the impressed offset has no influence on the output voltage.

摘要翻译： 本发明涉及一种用于调节测量传感器的输出信号的电路，用于在具有固定接地电位的控制装置中进一步处理，该固定接地电位不一定对应于测量传感器的接地电位。 提供了可以集成在芯片上并具有以下特征的调理电路。 调理电路补偿了排气探头与控制装置接地之间波动的接地偏移，并利用负载有潜力的排气探头。 电路装置包括可以改变以影响调节电路的输入信号的外部电路。 利用这种可变的外部电路，可以对电路装置的输出信号进行如此修改，使得控制装置输出具有偏移的输出电压和没有偏移的输出电压。 在没有偏移的输出电压的外部电路的情况下，在输入电压上施加偏移，然后在放大系数的输出处再次减去输入电压，使得被施加的偏移的绝对值对输出电压没有影响 。

公开(公告)号：US5294890A

公开(公告)日：1994-03-15

申请号：US971867

申请日：1993-01-19

申请人： Hermann Hemminger ,  Stephan Johne

发明人： Hermann Hemminger ,  Stephan Johne

IPC分类号： G01D18/00 ,  G01R31/02 ,  G01R31/28

CPC分类号： G01R31/2829

摘要： The monitoring circuit for a sensor connected to a low-potential and high-potential line, such as a thermal element, includes a high-resistance pulldown resistor connected between the high potential line and ground, a offset voltage source connected to the low-potential line to supply an offset voltage higher than a minimum transistor control voltage; first and second testing transistor shaving control electrodes connected to respective ones of the lines via resistor arrangements; and a third testing transistor having a control electrode connected to an output of a p-type channel FET having a control electrode connected to one of the two sensor lines. Whether the operating state of the sensor is normal, involves a short circuit to ground or the supply voltage or an interruption of the sensor lines is determined by monitoring the switching states of the first testing transistor and a series combination of the second and third testing transistor.

摘要翻译： PCT No.PCT / DE92 / 00327 Sec。 371日期：1993年1月19日 102（e）日期1993年1月19日PCT提交1992年4月24日PCT公布。 第WO92 / 21985号公报 日期为1992年12月10日。连接到低电位和高电位线路（例如热元件）的传感器的监控电路包括连接在高电位线和地之间的高电阻下拉电阻，偏移电压 源极连接到低电位线以提供高于最小晶体管控制电压的偏移电压; 第一和第二测试晶体管剃须控制电极经由电阻器布置连接到相应的线路; 以及第三测试晶体管，其具有连接到具有连接到两个传感器线之一的控制电极的p型沟道FET的输出的控制电极。 传感器的运行状态是否正常，涉及到地短路或电源电压，或通过监测第一测试晶体管的开关状态和第二和第三测试晶体管的串联组合来确定传感器线的中断 。