In certain embodiments, a method for synchronizing login processes in a web environment includes receiving user authentication information for a particular one of a plurality of access points, each access point operable to provide a user system that submitted the user authentication information access to one or more target items. THE PWM control signal is coupled to a secondary of the power supply system and used to control a synchronous rectifier that is coupled within the secondary side. The crystal member is constructed in such a manner that a third angle is substantially equal to a half of a fourth angle.