Patent ID: 8102631
Filing Date: 2012-01-24
Classification: G06F

Abstract:
1. A computer power supply, comprising: a standby voltage output terminal to output a standby voltage; a power connector comprising a standby voltage output pin that is connected to the standby voltage output terminal; and a standby voltage discharge circuit, comprising: wherein, the standby voltage output pin of the power connector is connected to a cathode of the zener diode, an anode of the zener diode is connected to a first terminal of the first electrical switch, a second terminal of the first electrical switch is grounded, a third terminal of the first electrical switch is connected to a first terminal of the second electrical switch and connected to the standby voltage output terminal via a first resistor, a second terminal of the second electrical switch is grounded, a third terminal of the second electrical switch is connected to the standby voltage output terminal via a second resistor, the capacitor is connected between the standby voltage output terminal and ground, each of the first and second electrical switches is turned on in response to the first terminal thereof is at a high voltage level, and each of the first and second electrical switches is turned off in response to the first terminal thereof is at a low voltage level; wherein when the computer power supply is powered, the zener diode is turned on to turn on the first electrical switch and turn off the second electrical switch; when the computer power supply is not powered and the standby voltage is reduced to a predetermined value, the zener diode is turned off to turn off the first electrical switch and turn on the second electrical switch, such that the standby voltage is reduced by discharging through the second electrical switch.