A 6Gb/s 40dB burst-mode digitally adaptive equalizer with reference-calibrated overshoot control

This paper presents a burst-mode equalizer for the communication incorporating electrical idle state which is usually used for power management. Fabricated in 0.18μm CMOS technology, the proposed equalizer can compensate over 90-inch microstrip on an FR4 PCB, which has a 40dB loss at 3GHz. The proposed overshoot control scheme with reference calibration can reduce offset-induced error on detections and is observed to achieve jitter improvement of 0.06UI. With the help of envelope detector and digital adaptation, the reaction time under burst-mode transmission is 5.5ns or 33bit-time. The equalizer consumes 26.7mW from a 1.8V supply and measured BER is less than 10^-12.