Patent ID: 7042254

Claim:
A differential signal transmission system for transmitting a first differential signal, a second differential signal, and a third differential signal, said differential signal transmission system comprising: a first transmission circuit comprising a first differential signal output circuit, having a first single input and a first pair of output lines, and a first pair of resistors serially connected across the first pair of output lines, said first differential signal output circuit receiving a first input signal and outputting to the first pair of output lines said first differential signal corresponding to the first input signal; a second transmission circuit comprising a second differential signal output circuit, having a second single input and a second pair of output lines, and a second pair of resistors serially connected across the second pair of output lines, said second differential signal output circuit receiving a second input signal and outputting to the second pair of output lines said second differential signal corresponding to the second input signal; a third transmission circuit comprising a third differential signal output circuit, having a third single input and a third pair of output lines, and a third pair of resistors serially connected across the third pair of output lines, said third differential signal output circuit receiving a third input signal and outputting to the third pair of output lines said third differential signal corresponding to the third input signal; a fixed voltage source connected to the junction of said serially connected third pair of resistors; a first connection part connecting a first one of the third pair of output lines to the junction of said serially connected first pair of resistors; a second connection part connecting a second one of the third pair of output lines to the junction of said serially connected second pair of resistors; a first signal line pair connected to the first pair of output lines; a second signal line pair connected to the second pair of output lines; a first terminator connected across said first signal line pair for transmitting the first differential signal with one side of the third differential signal as a first common voltage; a second terminator connected across said second signal line pair for transmitting the second differential signal with another side of the third differential signal as a second common voltage; and a voltage adjuster for equalizing voltages at a first intermediate node of the first terminator and a second intermediate node of the second terminator.