Patent ID: 7916494
Filing Date: 2011-03-29
Classification: H05K

Abstract:
1. A printed circuit board (PCB) comprising: a high-speed differential signal control chip; a first to a fourth coupling capacitor pads; a first and a second connector pads; a first and a second inductor pads; two first transmission lines, two second transmission lines, two third transmission lines, and two fourth transmission lines; a power pin; and two sharing pads arranged on the same layer together with the second and third transmission lines, the first to fourth coupling capacitor pads, and the first and second connector pads, wherein two first terminals of the two first transmission lines are connected to two output terminals of the high-speed differential signal control chip respectively, two second terminals of the two first transmission lines are connected to the two selection pads respectively, two first terminals of the two fourth transmission lines are connected to the power pin respectively, two second terminals of the two fourth transmission lines are connected to the two inductor pads respectively; and two selection pads connected to the two sharing pads through two vias, respectively, and arranged on the same layer together with the high-speed differential signal control chip, the first and fourth transmission lines, the first and second inductor pads, and the power pin, wherein two first terminals of the two second transmission lines are connected to the first connector pads respectively, two second terminals of the two second transmission lines are connected to the first and second coupling capacitor pads respectively, two first terminals of the two third transmission lines are connected to the second connector pads respectively, two second terminals of the third transmitting lines are connected to the third and fourth coupling capacitor pads respectively; wherein a coupling capacitor is operable to selectively connect each of the first and second coupling capacitor pads and a corresponding one of the two sharing pads, or connect each of the third and fourth coupling capacitor pads and a corresponding one of the two sharing pads; and wherein an inductor is operable to connect each of the first and second inductor pads and a corresponding one of the two selection pads, and the first and second inductor pads and the two selection pads are operable to be void.