Patent ID: 8614430
Filing Date: 2013-12-24
Classification: H03K

Abstract:
1. A reset circuit, comprising: a power supply; a metal-oxide-semiconductor field-effect transistor (MOSFET) that has a gate, a drain, and a source; both the gate and the drain connected to the power supply; a capacitor that has one end connected to the source and another end grounded; a Schmitt trigger connected to the capacitor; an inverter connected to the Schmitt trigger; and a photoelectric coupler comprising a light emitting unit and a light receiving unit; the light emitting unit connected to the power supply, and the light receiving unit connected to an electronic device; wherein a voltage of the capacitor charges through the source of the MOSFET by the power supply, and discharges upon reaching a threshold voltage of the Schmitt trigger causing the Schmitt trigger to generate a reset signal output by the inverter; a voltage of power supply turns on the light emitting unit, the light emitting unit emits light to turn on the light receiving unit, and the light receiving unit receives and transmits the reset signal to the electronic device to reset the electronic device.