POWER-ON-RESET CIRCUIT

摘要

PROBLEM TO BE SOLVED: To obtain a power-on-reset circuit enabling secure generation of a power-on-reset signal (one-shot pulse), irrespective of and unaffected by the rise speed of a source voltage.

SOLUTION: The power-on-reset circuit is provided with: a first voltage setting section 1 having a first output voltage Va (t) which increases toward a first voltage with a voltage increase of a high voltage-level source VDD; a second voltage setting section 2 having a second output node b for outputting a second output voltage Vb (t) which increases toward a second voltage different from the first voltage with the voltage increase of the high voltage-level source VDD; and a comparator CMP comparing the first output voltage Va (t) with the second output voltage Vb (t) and generating a reset pulse when the comparison results in match.

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