Baseline wander correction using zero and one mismatch adaptation

A method, comprising:

• receiving a serial data stream by an equalizer circuit, wherein the serial data stream includes a plurality of data symbols;
• determining, by a circuit, an average magnitude of a first data value using a subset of the plurality of data symbols;
• determining, by the circuit, an average magnitude of a second data value using one or more data symbols of the subset of the plurality of data symbols;
• and
• adjusting a common mode operating point of the equalizer circuit by sinking, by the circuit, a current from an input of the equalizer circuit, wherein a value of the current is based on a result of comparing the average magnitude of the first data value and the average magnitude of the second data value.

A system, comprising:

• a first device configured to transmit a serial data stream, wherein the serial data stream encodes a plurality of data symbols;
• and
• a second device including an equalizer circuit, wherein the second device is configured to:
• receive the serial data stream;
• determine an average magnitude of a first data value using one or more data symbols of a subset of the plurality of data symbols;
• determine an average magnitude of a second data value using the one or more data symbols of the subset of the plurality of data symbols;
• and
• adjust a common mode operating point of the equalizer circuit by sinking a current from an input of the equalizer circuit, wherein a value of the current is based on a comparison of the average magnitude of the first data value and the average magnitude of the second data value.