Patent ID: 7965104

Claim:
A data transmission system comprising: a transmission line including a first transmission line and a second transmission line; a transmitter connected to one end of the transmission line; a receiver connected to another end of the transmission line; a first input protection resistor connected between the first node and the data detection unit; a second input protection resistor connected between the second node and the data detection unit; and a third input protection resistor connected between the third node and the current supply unit, wherein the transmitter comprises: a first connection unit connected to one end of the first transmission line, the first connection unit being controlled to be turned ON and OFF in accordance with data for transmission, the first connection unit, when turned ON, electrically connecting the first transmission line to a ground terminal; and a second connection unit connected to one end of the second transmission line, the second connection unit being controlled to be turned ON and OFF complementarily with the first connection unit in accordance with the data for transmission, the second connection unit, when turned ON, electrically connecting the second transmission line to a ground terminal, and wherein the receiver comprises: a first termination resistor having one end connected to a first node that is connected to another end of the first transmission line; a second termination resistor having one end connected to a second node that is connected to another end of the second transmission line; the first and second termination resistors having another ends connected in common to a third node; and a receiver circuit comprising: a current supply unit that supplies a current to the third node; and a data detection unit that generates and outputs received data corresponding to the data for transmission, in accordance with a potential difference between the first node and the second node.