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http://dx.doi.org/10.5573/ieie.2016.53.5.077

Dual-Mode Reference-less Clock Data Recovery Algorithm  

Kwon, Ki-Won (College of Information and Communication Engineer, Sungkyunkwan University)
Jin, Ja-Hoon (College of Information and Communication Engineer, Sungkyunkwan University)
Chun, Jung-Hoon (College of Information and Communication Engineer, Sungkyunkwan University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.53, no.5, 2016 , pp. 77-86 More about this Journal
Abstract
This paper describes a dual-mode reference-less CDR(Clock Data Recovery) operating at full / half-rate and its operation algorithm. Proposed reference-less CDR consists of a frequency detector, a phase detector, a charge pump, a loop filter, a voltage controlled oscillator, and a digital block. The frequency and phase detectors operate at both full / half-rate for dual-mode operation and especially the frequency detector is capable of detecting the difference between data rate and clock frequency in the dead zone of general frequency detectors. Dual-mode reference-less CDR with the proposed algorithm can recover the data and clock within 1.2-1.3 us and operates reliably at both full-rate (2.7 Gb/s) and half-rate (5.4 Gb/s) with 0.5-UI input jitter.
Keywords
Clock and Data Recovery; Reference-less CDR; Dual-mode; Dead zone; Frequency detector;
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