Patent ID: 7930570

Claim:
A power supply control circuit for a computer, comprising: a first electric switch comprising a control terminal connected to a super input/output chip to receive a control signal, a power terminal connected to a standby power supply, and a ground terminal, wherein the control signal is high when the computer is in a working state and an off state, and low when the computer is in a sleep state; a second electric switch comprising a control terminal connected to the power terminal of the first electric switch, a power terminal connected to the standby power supply, and a ground terminal; a third electric switch comprising a control terminal connected to the power terminal of the second electric switch, a power terminal connected to the standby power supply, and an output terminal; a fourth electric switch comprising a control terminal connected to the power terminal of the first electric switch, a power terminal connected to a first system power supply, and a ground terminal; and a fifth electric switch comprising a control terminal connected to the power terminal of the fourth electric switch, a power terminal connected to a second system power supply, and an output terminal connected to the output terminal of the third electric switch; wherein upon a condition that the computer is in the working state, the standby power supply and the first and second power supplies are provided, the first electric switch is turned on, the second and fourth electric switches are turned off, the third electric switch is turned off, the fifth electric switch is turned on, the output terminal of the fifth electric switch outputs the second system power supply; upon a condition that the computer is in the sleep state, only the standby power supply is provided, the first electric switch is turned off, the second electric switch is turned on, the third electric switch is turned on, and the output terminal of third electric switch outputs the standby power supply; and upon a condition that the computer is in the off state, only the standby power supply is provided, the first electric switch is turned on, the second electric switch is turned off, the third electric switch is turned off, and the output terminal of the third electric switch outputs no power supply.