CURRENT SOURCE ARRANGEMENT

摘要

In a digital-to-analog converter (1) a plurality of binary weighted currents are generated, which currents must be in an accurate current ratio relative to each other. By means of a coupling network (15) which is controlled by a control circuit (17), a plurality of currents from said digital-to-analog converter (1) can be coupled to a precision current-mirror circuit (25) in accordance with a cyclic pattern, this allowing deviations in the ratios of the currents from the digital-to-analog converter (1) to be detected by detection means (80) which control correction means (18.2 to 18.16) by means of which the currents from the digital-to-analog converter (1) are corrected so as to reduce the detected deviations.