1.25Gb/s Burst-mode CDR with Robustness to Duty Cycle Distortion

With burst-mode optical receivers, duty cycle distortion appears inevitably. If CDR based on gatedoscillators is used in the burst mode receiver, its performance is seriously affected by duty cycle distortion. In this paper, we show why duty cycle distortion occurs, and how this distortion affects the CDR. And we propose a new CDR structure which is robust to duty cycle distortion.