Patent ID: 8635482

Claim:
A motherboard comprising: an Input/Output (I/O) chip adapted to detect a standby voltage on the motherboard and output an indicating signal that indicates whether the standby voltage is at high level; a south bridge chip, connected to the I/O chip, adapted to receive the indicating signal; and a delay circuit, connected to the I/O chip and the south bridge chip, adapted to delay the indicating signal before sending the indicating signal to the south bridge chip; wherein the delay circuit comprises a first resistor, a second resistor, and a capacitor; a first terminal of the first resistor is coupled to a power source, a second terminal of the first resistor is connected to a first terminal of the second resistor and connected to the I/O chip to receive the indicating signal, and a second terminal of the second resistor is connected to ground; a first terminal of the capacitor is connected to the first terminal of the second resistor and connected to the south bridge chip to output the delayed indicating signal, and a second terminal of the capacitor is connected to ground.