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    ANALOG CURRENT OUTPUT CIRCUIT
    1.
    发明公开
    ANALOG CURRENT OUTPUT CIRCUIT 无效

    公开(公告)号：EP2372887A4

    公开(公告)日：2018-03-07

    申请号：EP08879196

    申请日：2008-12-26

    申请人： MITSUBISHI ELECTRIC CORP

    发明人： SAITO SEIICHI ,  NOMOTO HIROKAZU ,  AKEBOSHI YOSHIHIRO

    IPC分类号： H02M3/00 ,  G05F1/56 ,  H02M1/00 ,  H02M3/28

    CPC分类号： G05F1/56 ,  H02M3/28 ,  H02M2001/0032 ,  H02M2001/0045 ,  Y02B70/16 ,  Y10T307/944

    摘要： For the purpose of obtaining an analog current output circuit that can realize a reduction in a power loss that occurs when the resistance of a load connected to the analog current output circuit is small and securing of quick responsiveness performed when the resistance of the connected load is large, a rising start position and a tilt of an internal control voltage Va are set such that the internal control voltage Va crosses, at the maximum of an analog output current, a load end voltage Vb obtained when the resistance of a load 3 is a resistance near the center of a specification range. According to a comparison result in a comparator 11, a switch 8 causes a DC/DC converter 1 to input a high reference voltage H and causes an output transistor 2 to output a high power supply voltage VccH when the internal control voltage Va is smaller than the load end voltage Vb and causes the DC/DC converter 1 to input a low reference voltage L and causes the output transistor 2 to output a low power supply voltage VccL when the internal control voltage Va is larger than the load end voltage Vb.