Digitally controlled even harmonic distortion correction

A system for equalizing errors in common mode inputs due to mismatches, the system comprising:

• a first bus configured to have a first voltage;
• a second bus configured to have a second voltage;
• a first delta-sigma modulator (DSM) having a first input coupled to the first bus, a second input coupled to the second bus, and an output coupled to an analog-to-digital converter (ADC);
• a second DSM having a first input coupled to the first bus, a second input coupled to the second bus, a third input coupled to the ADC, and an output coupled to the ADC;
• a dynamic-element-matching network (DEM) having a first input coupled to the ADC and a second input coupled to the ADC;
• and
• a digital-to-analog converter (DAC) having a first input coupled to the DEM and a second input coupled to the DEM, and a first output coupled to the first bus and a second output coupled to the second bus.