Abstract
An improved DWA method for 14-bit 5+4+5 segmented current-steering digital-to-analog converters is proposed. Through to SFDR and dynamic performance of compromise consideration, this method uses two barrel shifters to control the starting position of the current element sequence every four clocks. Compared with the conventional DWA method, it features smaller device size and improves SFDR. And based on SIMULINK platform, through the establishment of high level of current steering D/A converter model with matching errors and output impedance. The simulation results show that SFDR is improved about 25dB.
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