Receiver of serial data link, calibration circuit and method of adjusting direct current offset

The invention relates to a receiver of a serial data link, a calibration circuit and a method of adjusting DC offset. The receiver of the serial data link comprises: an analog front end comprising a continuous time linear equalizer configured to receive an input signal from a transmitter, the continuous time linear equalizer comprising: a first output node; a second output node; a plurality of programmable tail current sources configured to adjust a DC offset between the first output node and the second output node; and a calibration circuit including: a limiter configured to output a difference between a first average output voltage corresponding to the first output node and a second average output voltage corresponding to the second output node; and a calibration counter configured to incrementally or incrementally decrease the offset count based on the difference, where the plurality of programmable tail current sources are adjusted based on a value of the offset count. 本发明涉及串行数据链路的接收器、校准电路和调节直流偏移的方法。该串行数据