A bang-bang PLL employing dynamic gain control for low jitter and fast lock times

Chan, Michael J., Postula, Adam, Ding, Yong and Jozwiak, Lech (2006) A bang-bang PLL employing dynamic gain control for low jitter and fast lock times. Analog Integrated Circuits and Signal Processing, 49 2: 131-140. doi:10.1007/s10470-006-7581-3

Author Chan, Michael J.
Postula, Adam
Ding, Yong
Jozwiak, Lech
Title A bang-bang PLL employing dynamic gain control for low jitter and fast lock times
Journal name Analog Integrated Circuits and Signal Processing   Check publisher's open access policy
ISSN 0925-1030
Publication date 2006-11
Sub-type Article (original research)
DOI 10.1007/s10470-006-7581-3
Volume 49
Issue 2
Start page 131
End page 140
Total pages 10
Editor D. G. Haigh
M. Ismail
N. Fujii
Place of publication New York, U.S.A.
Publisher Springer-Verlag
Collection year 2006
Language eng
Subject C1
290902 Integrated Circuits
700302 Telecommunications
Abstract Bang-bang phase detector based PLLs are simple to design, suffer no systematic phase error, and can run at the highest speed a process can make a working flip-flop. For these reasons designers are employing them in the design of very high speed Clock Data Recovery (CDR) architectures. The major drawback of this class of PLL is the inherent jitter due to quantized phase and frequency corrections. Reducing loop gain can proportionally improve jitter performance, but also reduces locking time and pull-in range. This paper presents a novel PLL design that dynamically scales its gain in order to achieve fast lock times while improving fitter performance in lock. Under certain circumstances the design also demonstrates improved capture range. This paper also analyses the behaviour of a bang-bang type PLL when far from lock, and demonstrates that the pull-in range is proportional to the square root of the PLL loop gain.
Keyword Bang-bang Pll
Binary Pll
Gain Control
Capture Range
Computer Science, Hardware & Architecture
Engineering, Electrical & Electronic
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

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Created: Wed, 15 Aug 2007, 09:39:49 EST