Abstract: A frequency-domain equalizer with a mixed-signal adaptive control loop and a novel baseline wander (BLW) canceller are proposed.The equalizer is independent of channel-modeling accuracy,and its control loop is intrinsically stable.An AGC function is incorporated into the equalizer without an extra AGC circuit.The proposed BLW canceller uses a peak detector to monitor the BLW and full feedback method to accomplish BLW canceling.High canceling accuracy and robust performance are achieved.The circuits are tested in 0.25μm CMOS technology.Better performance and smaller silicon area are achieved compared with results in the literature.

Key words: equalizer, baseline wander, adaptive control loop