Comparative Study on Pre-Distortion/Cal...

This paper introduces a variety of different pre-distortion/calibration methods for current-steering digital-to-analog converters (CS-DAC) and compares their respective performance. The comparison is done through simulations of the different methods with a static CS-DAC model in MATLAB and the subsequent calculation of the signal-to-distortion ratio (SDR) and the spurious-free dynamic range (SFDR). Since the requirements for high-speed, high-precision applications are becoming more and more stringent on the data converters the need for calibration methods becomes also increasingly important. A quantitative comparison can help to decide on the right method for different applications in terms of reducing the distortions resulting from the static current cell mismatch of CS-DACs. This paper extends upon the previous research by using different input signal types for the simulations.