Reducing the standby power consumption of the S3 state for PCS

Most of the research into saving energy which tries to improve the power efficiency and manage the power systems uses software control, but in our design we modify the S3 state to Deep S3 state in order to save power consumption by means of the Suspend to RAM mode. We redesign the circuit to save power in the PC standby mode. First, we recheck the whole circuit in the standby mode and to clarify the chip which is used to wake up the system and to turn off any unnecessary chip power in the standby mode. Secondly, we redesign the power sequence and use an additional chip to control the system power that allows a normal system operation to turn off the power of the unnecessary control chips. Third, we simplify the multiple remote wake-up mechanism to control the power of the remote boot device, which saves the power of the standby mode. The improvement shows that our design consumes less than 0.23W in Deep S3 state and 0.42W with multiple remote wake-up functions.