A 10-Gbs 003-mm 2 128-pJbit Half-Rate Injection-Locked CDR With Path Mismatch Tr

Abstract

A 10-Gb/s, 0.03-mm 2, 1.28-pJ/bit half-rate all- digital injection-locked clock and data recovery (ILCDR) with a path mismatch tracking (PMT) loop is presented. When injection timing is not perfectly aligned with the phase of the oscillator , the timing margin of the data sampler is reduced, resulting in the degradation of jitter tolerance (JTOL) performance. The proposed ILCDR achieves robust injection behavior over path mismatch variations by correlating the error information from the phase de