Patent ID: 8476944

Claim:
A reset circuit set in an electronic device for restoring the electronic device to factory settings, the reset circuit comprising: a single-pole-double-throw selection button, wherein a first terminal of a pole of the selection button is connected to a first power supply or a second power supply; a first voltage converter, wherein an input terminal of the first voltage converter is connected to a first contact of the selection button; a second voltage converter, wherein an input terminal of the second voltage converter is connected to a second contact of the selection button and an output of the first voltage converter; a processor connected to an output terminal of the second voltage converter; a first voltage dividing circuit; a second voltage dividing circuit connected to the first voltage dividing circuit and the processor; and a switching circuit connected between the first and second voltage dividing circuits; wherein when a second terminal of the pole is connected to the first contact of the selection button and the first terminal of the pole is connected to a first power supply, the first and second voltage converters convert a voltage from the first power supply to supply power for the processor, the first voltage dividing circuit turns on the switching circuit to make the second voltage dividing circuit output a first signal to the processor; when the second terminal of the pole is connected to the second contact of the selection button and the first terminal of the pole is connected to a second power supply, the second voltage converter converts a voltage from the second power supply to supply power for the processor, the first voltage dividing circuit turns off the switching circuit to make the second voltage dividing circuit output a second signal to the processor, and the processor restores the electronic device to factory default settings according to the second signal.