Digital/analog converter circuit

A selecting part (105) selects, from among a plurality of step voltages (SV1,SV2,SV3,...) to which a voltage changes stepwise in value, a step voltage corresponding to the digital value of a digital data (D-DATA). It should be noted that different digital values have been assigned to the respective step voltages (SV1,SV2,SV3,...). An amplifying part (106) amplifies the step voltage selected by the selecting part (105). An output part (107) supplies, as an output voltage (Vout), the step voltage, which has been amplified by amplifying part (106), only for an interval corresponding to the digital value of the digital data (D-DATA).