Clock phase aligning apparatus for burst-mode data

A clock phase aligning apparatus comprising:

• an over-sampling unit to change one bit into a plurality of bits represented as a continuous serial signal by oversampling data amplified and converted into an electric signal after received in a form of a burst mode optical signal;
• a parallel conversion unit to convert the continuous serial signal into a parallel signal;
• a parallel phase alignment unit to group a plurality of pieces of parallel data constituting the parallel signal within a clock period in a unit of bits to which one bit is divided by the oversampling;
• a phase determination unit to determine a phase value by comparing parallel data of at least one of the groups with a sampling pattern preset for selecting a phase;
• a signal selection unit to select and output a signal corresponding to the determined phase value from the plurality of pieces of parallel data;
• and
• is a controller to control a start time of the phase determination unit and to maintain the determined phase value until another phase comparison and phase determination for a next input data packet are performed.