| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To surely output a reset signal at a low level, even when a power source voltage Vp is not larger than an operation threshold voltage of a reset signal output circuit. <P>SOLUTION: The reset signal output circuit 3 for outputting a reset signal at a low level, when the output power source voltage Vp is the lower limit value or smaller and having an operation threshold voltage lower than the lower limit value, and a depletion type switching circuit 9 inserted between an output terminal 5 of the reset signal of the reset signal output circuit and the ground, which becomes conductive, when the power source voltage is the lower limit value or less and shields when exceeding the lower limit value, are provided. <P>COPYRIGHT: (C)2003,JPO</p> |
