Patent ID: 8243869
Filing Date: 2012-08-14
Classification: H04L

Abstract:
1. A burst mode clock and data recovery (BCDR) circuit for fast data recovery of passive optical network (PON) traffic, the BCDR circuit comprising: an over-sampler for over sampling an input burst data signal and being for generating over-sampled data streams; a phase interpolator for generating sampling clock signals using a reference clock and phase information; a phase estimation unit (PEU) for determining a phase error in the over-sampled data streams; a burst detector for generating an incoming burst data indication by identifying a known pattern in a preamble and a number of transitions in the over-sampled data streams; a phase retrieval unit for setting the phase interpolator with respective phase information of the input burst data signal prior to reception of the input burst data signal as indicated by the incoming burst data indication received from the burst detector; and a pipeline for delaying the over-sampled data streams from being output until a single data stream is selected, the selected single data stream is output when the incoming burst data indication is asserted.