To provide a signal output device that ensures a system stability when a short circuit between an output terminal and another terminal is detected.SOLUTION: An output terminal 23 of a signal output device 20 is connected via a branch path 33 to a voltage dividing point D provided in the middle of main paths 31 and 32 for connecting a power supply terminal 21 and a ground terminal 22, and externally transmits an output signal based upon a voltage of the voltage dividing point D. A signal generation circuit 60 adjusts a voltage at the voltage dividing point D to generate an output signal. A short circuit detection circuit 50 detects a short circuit between the output terminal 23 and another terminal when a current flowing through the branch path 33 is larger than a predetermined short circuit detection threshold. When the short circuit is detected by the short circuit detection circuit 50, switching circuits 61 and 62 switch an energizing capability or a configuration of the signal generation circuit 60 so as to limit a short-circuit current flowing in the branch path 33. The short-circuit current is set to a value equal to or higher than the short circuit detection threshold and lower than a current upper limit value based on a supply capability of a DC power supply.SELECTED DRAWING: Figure 1

    【課題】出力端子と他の端子とのショートが検出されたとき、システムの安定性を確保する信号出力装置を提供する。【解決手段】信号出力装置20の出力端子23は、電源端子21とグランド端子22とを接続する主幹経路31、32の途中に設けられた分圧点Dに分岐経路33を経由して接続され、分圧点Dの電圧に基づく出力信号を外部に送信する。信号生成回路60は、分圧点Dの電圧を調整し、出力信号を生成する。ショート検出回路50は、分岐経路33に流れる電流が所定のショート検出閾値より大きいとき、出力端子23と他の端子とのショートを検出する。切替回路61、62は、ショート検出回路50によりショートが検出されたとき、信号生成回路60の通電能力又は構成を切り替え、分岐経路33に流れるショート時電流を制限する。ショート時電流は、ショート検出閾値以上、且つ、直流電源の供給能力に基づく電流上限値より小さい値に設定される。【選択図】図1


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    Title :

    SIGNAL OUTPUT DEVICE


    Additional title:

    信号出力装置


    Contributors:

    Publication date :

    2019-06-24


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G08C Übertragungssysteme für Messwerte, Regel-, Steuer- oder ähnliche Signale , TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR



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