| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a voltage detection circuit having short stabilization time. <P>SOLUTION: The voltage detection circuit is started by an enable signal, and is detected by outputting a detection signal whether a measured voltage is higher than or lower than a reference voltage as a threshold. The circuit is provided with: a D-type flip flop using a power supply voltage as a D input, and using an inverted signal of the output of a comparator circuit as a clock, and using an enable inverted signal as a reset input; a detection output circuit for calculating the logical product of the Q output of the D-type flip flop and the output of the comparator circuit, and for outputting a detection signal; and an acceleration charging circuit for calculating the negative logical product of the inverted signal of the D-type flip flop Q output and the output of the comparator circuit, and for outputting a control signal to control connection from a power supply voltage to a divided voltage. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
