Patent ID: 7358792

Claim:
A discharge device connected to an output terminal of a power supply stabilizing device, the discharge device comprising: a comparison means for comparing an input power supply voltage and an output power supply voltage of the power supply stabilizing device; an acquisition means for receiving a comparison signal, wherein the comparison signal is a comparison of an activation voltage and the input power supply voltage of the power supply stabilizing device; and a control device, connected to the comparison means and the acquisition means, including a first terminal connected to the output terminal of the power supply voltage stabilizing device, a second terminal, which is grounded, and a control terminal, which is connected to the comparison means and the acquisition means; wherein the comparison means controls the control device such that the output power supply voltage follows the input power supply voltage when the input power supply voltage becomes lower than or equal to the output power supply voltage; and the acquisition means controls the control device such that the output terminal is grounded when the input power supply voltage becomes lower than or equal to the activation voltage.