| 摘要 |
PROBLEM TO BE SOLVED: To downsize an electronic device provided with a power-on reset circuit by eliminating the need for a capacitor with large capacitance for a long reset period setting and reducing the number of components. SOLUTION: The power-on reset circuit 2 of this invention that generates a terminal voltage Vq to bring an electric state of a circuit 1 to a power-on reset state until a prescribed power-on reset period elapses after application of power to the circuit 1 and gives the terminal voltage to a reset terminal RET of the circuit 1, includes an electric series connection configuration between a fixed resistor R1 that shows a usual resistance change characteristic against a temperature change and a positive characteristic thermistor PT providing a PTC(Positive Temperature Coefficient) characteristic against the temperature change and uses a voltage at a connection point between the resistor R1 and the thermistor PT for the terminal voltage so as to eliminate the need for the capacitor for a long reset period setting.
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