Circuit for facilitating computer system waking up from sleep state

A circuit for a computer system, comprising:

• a PWM module capable of converting a first voltage to a second voltage, the first voltage being capable of decreasing slower than the second voltage to have the PWM module entering in an unwanted state when the computer system is changed from a first state to a second state, the PWM module comprising a disabling pin capable of locking the PWM module;
• and
• a first switch and a second switch, the first switch comprising an input end and an output end, the second switch comprising an input end and an output end, a standby voltage, which is maintained when the computer system enters in the second state, providing power to the second switch, the output end of the first switch connected to the input end of the second switch, the output end of the second switch connected to the disabling pin, the input end of the first switch capable of monitoring the computer system being changed from a first state to a second state to control the output end of second switch, thereby locking the PWM module to prevent the PWM module from entering in the unwanted state.