Patent ID: 7992025

Claim:
A power control circuit for supplying power for a computer component of a computer, the power control circuit comprising: a first switch comprising a first terminal connected to a standby power supply via a first resistor, a second terminal to receive a motherboard state signal from a motherboard of the computer, and a third terminal connected to the standby power supply via a second resistor; a second switch comprising a first terminal to receive a power state signal from the standby power supply, a second terminal grounded, and a third terminal connected to the first terminal of the first switch, configured for being turned on when the power state signal is at high level, and for being turned off when the power state signal is at low level; a third switch comprising a first terminal connected to the third terminal of the first switch, a second terminal connected to the standby power supply, a third terminal connected to a power terminal of the computer component to supply power to the computer component, and configured for being turned on when the first switch is turned off, and for being turned off when the first switch is turned on; a fourth switch comprising a first terminal connected to a first system power supply, a second terminal grounded, a third terminal connected to the standby power supply via a third resistor, and configured for being turned on when the first system power supply is powered; a fifth switch comprising a first terminal connected to the third terminal of the fourth switch, a second terminal grounded, a third terminal connected to a second system power supply via a fourth resistor, and configured for being turned on when the fourth switch is turned off, and for being turned off when the fourth switch is turned on; and a sixth switch comprising a first terminal connected to the third terminal of the fifth switch, a second terminal connected to the first system power supply, a third terminal connected to the power terminal of the computer component, and configured for being turned on when the fifth switch is turned off, and for being turned off when the fifth switch is turned on; wherein in response to the computer changing to a normal work state, the power state signal changes from low level to high level and the motherboard state signal is at high level, the fourth switch is turned on, the fifth switch is turned off, and the sixth switch is turned on, the power terminal of the computer component is stably supplied power by the first system power supply; wherein the motherboard state signal and the power state signal are at low level in response to the computer changing to a sleep state, the second switch is turned off, the first and third switches are turned on, the power terminal of the computer component is stably supplied power by the standby power supply.