Patent ID: 7372292
Filing Date: 2008-05-13
Classification: G06F,H04B,H04L,H05K

Abstract:
1. A signal transmitting device comprising: a first transmission line; at least one termination element to terminate the first transmission line at one end or both ends; a first integrated circuit to receive a signal; and a first connector adapted to connect a mother board, on which the first connector is mounted, to a first daughter board which comprises: a second integrated circuit to output a signal; a second transmission line which acts as a circuit element having a predetermined impedance and which transmits the signal output from the second integrated circuit to the first transmission line at high frequency; and a first resistor coupled between the first transmission line and the second transmission line, wherein the resistance of the said first resistor and the impedance of the first and second transmission lines are adapted to suppress increases in signal amplitude on the first transmission line to permit high speed signal transmission at a frequency of 50 Mhz. or higher for the signal output from the second integrated circuit and input to the first integrated circuit via the second transmission line and the first transmission line, and wherein the first resistor is located around the first connector to reduce signal reflection in the second transmission line.