| 摘要 |
PROBLEM TO BE SOLVED: To enable stable voltage monitoring of two systems without using a power supply other than a power supply monitored by a single input port.SOLUTION: A reset circuit 10 comprises: a first power supply (3.3 V); a first reset circuit (11) having an input terminal connected to the first power supply; a second power supply (5.0 V); a second reset circuit (12) having an input terminal connected to the second power supply; a first resistor (R2) having one end connected to the first power supply; a second resistor (R1) having one end connected to the second power supply; a circuit to be reset (13) reset by the first reset circuit or the second reset circuit and having an input port; and a PNP transistor (TR1) having an emitter connected to an output terminal of the first reset circuit, the other end of the first resistor, and the input port, having a base connected to an output terminal of the second reset circuit and the other end of the second resistor, and having a collector connected to the ground. |
