A true 4-cycle lock reference-less all-digital burst-mode CDR utilizing coarse-fine phase generator with embedded TDC

This paper presents a reference-less all-digital burst-mode CDR using a coarse-fine phase generator with embedded TDC. It achieves true 4-cycle lock without any reference clocks and warm-ups, and eliminates dynamic power consumption in a stand-by state. Fabricated in 65nm CMOS, this CDR operates from 1.40 to 2.06Gb/s and consumes 9.6mW at 2.06Gb/s while occupying 80×80μm 2 area.