Patent ID: 8548069

Claim:
A data transmission system comprising a first apparatus transmitting data, a second apparatus receiving the data, and a pair of transmission lines connecting the first and second apparatuses, the second apparatus comprising: a bridge termination resistor connected between the pair of transmission lines and having a resistance value that matches a differential impedance of the pair of transmission lines; a first switch that connects the bridge termination resistor to the pair of transmission lines when being turned on, and that disconnects the bridge termination resistor from the pair of transmission lines when being turned off; pull-up/down resistors connected between the transmission lines and a fixed voltage node, and having resistance values that respectively match characteristic impedances of the transmission lines, the fixed voltage node being either one of a power supply and a ground; and second switches that connect the pull-up/down resistors between the pair of transmission lines and the fixed voltage node when being turned on, and that disconnects the pull-up/down resistors from the pair of transmission lines when being turned off.