Title :
A 180-Mb/s to 3.2-Gb/s, continuous-rate, fast-locking CDR without using external reference clock
Author :
Hwang, Moon-Sang ; Lee, Sang-Yoon ; Kim, Jeong-Kyoum ; Kim, Suhwan ; Jeong, Deog-Kyoon
Author_Institution :
Seoul Nat.Univ., Seoul
Abstract :
A referenceless, continuous-rate, fast-locking CDR with an operating range of 180 Mb/s to 3.2 Gb/s is presented. The harmonic lock property of a rotational frequency detector and the maximum run-length limit of 8B10B encoded data are utilized to detect a harmonic lock and to accelerate acquisition process. A separate VCO control scheme is introduced to stabilize the loop with a modest amount of on-chip capacitance.
Keywords :
clocks; synchronisation; voltage-controlled oscillators; VCO; external reference clock; fast-locking clock and data recovery; harmonic lock; on-chip capacitance; rotational frequency detector; Acceleration; Capacitance; Clocks; Counting circuits; Detectors; Frequency locked loops; Robust stability; Solid state circuits; Voltage control; Voltage-controlled oscillators;
Conference_Titel :
Solid-State Circuits Conference, 2007. ASSCC '07. IEEE Asian
Conference_Location :
Jeju
Print_ISBN :
978-1-4244-1359-1
Electronic_ISBN :
978-1-4244-1360-7
DOI :
10.1109/ASSCC.2007.4425751
