Dynamic Mismatch Compensation (DMC) algorithm for amplitude and timing errors in current-steering DACs

A novel calibration algorithm called Dynamic Mismatch Compensation is proposed to reduce amplitude, delay and duty-cycle errors of MSB current cells (MSBs) in current-steering DACs. The DMC algorithm, suitable for high resolution and high speed DAC applications, can improve the SFDR by more than 10dBc, according to the behavioral-level DAC simulation results in Matlab. Transistor-level simulation results of two MSBs in 65nm technology show that 3D errors are reduced significantly by DMC algorithm.