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    • 10. 发明专利
    • Integrated circuit with power supply state determination circuit
    • 集成电路与电源状态确定电路
    • JP2012069728A
    • 2012-04-05
    • JP2010213170
    • 2010-09-24
    • Fujitsu Semiconductor Ltd富士通セミコンダクター株式会社
    • SUGIYAMA HIDETOSHINAGASAWA TAKAYUKISUZUKI HIDEAKI
    • H01L27/04G01R31/28H01L21/822
    • H01L27/0274G01R31/026G01R31/2884
    • PROBLEM TO BE SOLVED: To increase operation margin of a power supply open detection circuit.SOLUTION: The integrated circuit in which a power supply terminal, a ground terminal, an input terminal and an internal circuit are formed comprises: a unidirectional circuit provided between the input terminal and the power supply terminal in a direction from the input terminal to the power supply terminal; and a power supply state determination circuit which detects whether or not the power supply terminal is connected with an external power supply and outputs a power supply open detection signal. The unidirectional circuit has a first transistor having a gate to which voltage of the power supply terminal is applied and a second transistor connected in series with the first transistor, and voltage of the external power supply is input to the input terminal.
    • 要解决的问题:增加电源打开检测电路的运行余量。 解决方案:其中形成电源端子,接地端子,输入端子和内部电路的集成电路包括:单向电路,其从输入端子方向设置在输入端子和电源端子之间 到电源端子; 以及电源状态确定电路,其检测电源端子是否与外部电源连接,并输出电源打开检测信号。 单向电路具有第一晶体管,其具有施加电源端子的电压的栅极和与第一晶体管串联连接的第二晶体管,并且外部电源的电压被输入到输入端子。 版权所有(C)2012,JPO&INPIT