Digital-to-analog converter with dynamic matching and bit splitting

摘要

A digital-to-analog (D/A) converter (400) receives a N bit digital signal SN by a signal divider (440) which divides it into digital group signals SNk. In converter blocks (401k), these digital group signals SNk are then separately converted into analog group signals SGk. In a summation circuit (460) these analog group signals SGk are combined to the analog signal SA. The converter blocks (401k) can comprise banks (430k) with, e.g., current sources whose currents Ii are combined into the analog group signal SGk selectively according to the digital group signal SNk. The converter blocks (401k) can include circuits to equalize component variations, such as dynamic matching circuits (480k). The converter blocks (401k) can be configured according to the significance of the digital group signals SNk and the hardware can be optimized.