Patent ID: 8400194

Claim:
A current driving type transmitter using independent current signals, adapted for transmitting a logic state of data by differential current supplied through a pair of transmission lines composed of a true line and a bar line, comprising: a first data current source configured to independently generate and supply positive data current that constitutes the differential current; a second data current source configured to independently generate and supply negative data current that constitutes the differential current; a first selection switch configured to supply the positive data current generated by the first data current source to the true line or the bar line through a switching operation depending upon a logic state of data to be transmitted; a second selection switch configured to supply the negative data current generated by the second data current source to the bar line or the true line through a switching operation depending upon a logic state of data to be transmitted; an equalizing switch connected between the true line and the bar line and configured to equalize potentials through a switching operation; and a switching controller configured to control the switching operations of the first selection switch, the second selection switch and the equalizing switch depending upon whether the data to be transmitted transits or not.