Device and method for phase adjustment of receiver for PAM signaling

A device for independent phase adjustment of a pulse amplitude modulation (PAM) receiver, the device comprising:

• a plurality of samplers configured to perform sampling for signal level decision of multi-level input data;
• a global clock source configured to provide a common sampling clock to the samplers;
• and
• a plurality of phase adjusters configured to respectively adjust a phase of the common sampling clock to provide a sampling phase applied to a corresponding sampler;
• wherein the number of phase adjusters is less than the number of samplers, and
• two or more of the samplers are set as a group, and one phase adjuster corresponding to the group provides a sampling phase to the samplers of the group.

A method of independent phase adjustment of a pulse amplitude modulation (PAM) receiver including a plurality of samplers and a plurality of phase adjusters, the method comprising:

• determining a maximum height of each eye opening of a plurality of eye openings of multi-level input data;
• determining respectively a phase corresponding to the maximum height of each eye opening;
• adjusting respectively a phase of a common sampling clock provided from a global clock source to a determined phase in a phase adjuster corresponding to each eye opening;
• and
• sampling the multi-level input data by a sampler corresponding to each phase adjuster using the adjusted phase as a sampling phase.