Patent ID: 7994656

Claim:
A power supply system, comprising: a power supply to provide a working voltage; a daughterboard comprising a first voltage regulator module (VRM) connector, a second VRM connector, a first power connector, and a second power connector; wherein the first VRM connector and the second VRM connector are connected to the power supply to receive the working voltage; wherein the first power connector is connected to the first VRM connector via a first copper foil, and the second power connector is connected to the second VRM connector via a second copper foil; and a motherboard comprising a third power connector, a fourth power connector, and a plurality of loads; wherein the third power connector is connected to the fourth power connector via a third copper foil; wherein the third power connector and the fourth power connector are respectively connected to the first power connector and the second power connector of the daughterboard to receive the working voltage for the plurality of loads; wherein a difference between desired impedances of the first copper foil and the second copper foil is equal to a voltage difference between the third power connector and the fourth power connector divided by an average of output currents of the third power connector and the fourth power connector.