Patent ID: 7608941

Claim:
An adaptor circuit for a power supply comprising: a power connector adapted for coupling to an Advanced Technology Extended (ATX) power supply, the power connector comprising a power good pin and a power pin; a first electric switch having a first terminal connected to the power good pin of the power connector, a second terminal connected to the power pin of the power connector via a first resistor, and a grounded third terminal; a second electric switch having a first terminal connected to the second terminal of the first electric switch, a second terminal connected to a first voltage terminal via a first transmission line or a second voltage terminal via a second transmission line by selectively mounting a connection component to close an open segment of the corresponding transmission line according to a specification of chipsets on a motherboard, and a grounded third terminal; and an output terminal connected to the second terminal of the second electric switch to provide a voltage signal according to the specification of the chipsets to the chipsets on the motherboard as a driving voltage signal.