A transmitter includes a driver circuit configured to drive a channel connected to a first node by controlling a turn-on impedance of a pull-up path, a turn on impedance of a pull-down path, or both according to a plurality of control signals; an encoder configured to generate the plurality of control signals according to a multi-bit data and a calibration signal; and a calibration circuit configured to generate the calibration signal including calibration information corresponding to the plurality of control signals, wherein the encoder determines activation and magnitude of each of the plurality of control signals according to the multi-bit data and the calibration information.