Diagnostic circuit for monitoring an analog-digital converter circuit
    3.
    发明授权
    Diagnostic circuit for monitoring an analog-digital converter circuit 有权
    用于监控模数转换器电路的诊断电路

    公开(公告)号:US09054724B2

    公开(公告)日:2015-06-09

    申请号:US13679315

    申请日:2012-11-16

    CPC classification number: H03M1/1071 H03M1/12

    Abstract: Described is monitoring of an analog-digital conversion of a measured value of at least one of a pressure gauge, a level gauge and a flowmeter. Different measured values can be provided for the analog-digital converter by means of a first microcontroller, wherein these measured values are subsequently transmitted from this first area into a second area by means of a unidirectional coupler. These values are acquired by a second microcontroller in the second area and compared with reference values that are stored in the second area or at another location. This diagnostic circuit may make it possible to detect drifts of resistances and of reference voltages, as well as a faulty analog-digital converter or a program execution error of the first microcontroller.

    Abstract translation: 描述了监测压力表,液位计和流量计中的至少一个的测量值的模数转换。 可以通过第一微控制器为模拟数字转换器提供不同的测量值,其中这些测量值随后通过单向耦合器从该第一区域发送到第二区域。 这些值由第二区域中的第二微控制器获取,并与存储在第二区域或另一位置的参考值进行比较。 该诊断电路可以检测电阻和参考电压的漂移以及第一微控制器的故障模数转换器或程序执行错误。

    Driver circuit for intrinsically safe circuits

    公开(公告)号:US10530241B2

    公开(公告)日:2020-01-07

    申请号:US15432596

    申请日:2017-02-14

    Abstract: A driver circuit for an electric device of an intrinsically safe circuit is provided, including a coupling capacitor configured to be open to AC voltage signals and to decouple DC voltage signals, the coupling capacitor includes first and second terminals, and is electrically connected to a first output line of the driver circuit by the first terminal; a first circuit configured to detect an output current of the coupling capacitor, which flows from the first terminal to the first output line; a switchable element electrically connected to the second terminal; a switching behaviour of the element being controllable by switching the element from an electrically blocking state to an electrically conductive state when the output current at the first terminal exceeds a predefined threshold, so that the element in the conductive state causes discharge of the coupling capacitor via the second terminal.

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