| 摘要 |
<p>PURPOSE:To surely reset a circuit despite the change of a time constant caused to the rise of a power supply by outputting a reset signal after detecting the power voltage with which an element is completely stabilized after application of the power supply. CONSTITUTION:The power voltage with which a voltage comparator 6 outputs an inverted signal is set at a level where an element is stabilized. Thus, the inverted output can be used as a reset signal. That is, a reset signal is outputted with the voltage of a power supply 7 based on the difference potential between the resistance dividing voltage equivalent to the variable resistance obtained by a MOS transistor 1, a MOS transistor 2, and resistor 3 and the resistance dividing voltage obtained by the resistors 4 and 5. Thus, it is possible to solve such a problem where a circuit could not be reset when the rise time constant of the power supply 7 exceeds the time constant set by the resistor and a capaci tor.</p> |
