To provide a starting circuit which allows arbitrarily setting of a starting determination value with a simple configuration so as to prevent shut-off time delay.SOLUTION: A starting circuit 20 mounted on a vehicle comprises: an ignition signal input terminal 21 to which an ignition voltage Vig is applied; a high-potential line LH connected to the ignition signal input terminal 21; an output terminal 22 which outputs an output voltage V1; a PNP transistor Tr1, having a collector terminal connected to the output terminal 22, which outputs the output voltage V1 to the output terminal 22 when turned on; a Zener diode Z1, reversely connected between the high-potential line LH and a ground GND, which is clamped at a predetermined Zener voltage Vz1; a resistor R1 connected in series to the Zener diode Z1; and a line L1 which connects a connection point between the Zener diode Z1 and the resistor R1 to a base terminal of the PNP transistor Tr1.SELECTED DRAWING: Figure 2

    【課題】簡単な構成で起動判定値を任意に設定可能とし、遮断時間遅れを抑制することができる起動回路を提供する。【解決手段】車両に搭載される起動回路20は、イグニッション電圧Vigが印加されるイグニッション信号入力端子21と、イグニッション信号入力端子21に接続された高電位ラインLHと、出力電圧V1を出力する出力端子22と、コレクタ端子が出力端子22に接続され、オンになったときに出力端子22に出力電圧V1を出力するPNPトランジスタTr1と、高電位ラインLHとグランドGNDとの間で逆方向に接続され、予め定められたツェナー電圧Vz1でクランプするツェナーダイオードZ1と、ツェナーダイオードZ1と直列に接続された抵抗R1と、ツェナーダイオードZ1と抵抗R1の接続点をPNPトランジスタTr1のベース端子に接続するラインL1とを備えた。【選択図】図2


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    Title :

    STARTING CIRCUIT


    Additional title:

    起動回路


    Contributors:

    Publication date :

    2019-12-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    H03K PULSE TECHNIQUE , Impulstechnik / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR



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