Abstract
DAC mismatch is the bottleneck for data converters to achieve high
resolution. The error-feedback mismatch error shaping (EF-MES) is an
effective method to address the DAC mismatch. However, the existing
EF-MES can only achieve the 1st-order shaping for continuous-time (CT)
DACs. This letter proposes the methodology and implementation details of
a 2nd-order EF MES for CT DACs. This method can also be generalized to
arbitrarily high-order EF MES.