DIGITAAL/ANALOOG-OMZETTER.

摘要

A digital-to-analog converter includes a plurality of constant current sources (401-407) arrayed in a prescribed order and connected with a grounding lead wire (70). The respective constant current sources (401-407) are selectively connected to a first bus (303) by corresponding switches (501-507), respectively. A decoder (2) outputs switching signals to the switches (501-507). The switching signals are outputted from the decoder (2) to the switches (501-507) so that the constant current sources symmetrically positioned with respect to the center of an array of the plurality of constant current sources (401-407) are sequentially connected to the first bus (303). Thus, the digital-to-analog converter is improved in linearity.