Title
A 1.6-to-3.0-GHz Fractional-N MDLL with a Digital-to-Time Converter Range-Reduction Technique Achieving 397fs Jitter at 2.5-mW Power.
Abstract
This article analyzes the jitter-power tradeoff in multiplying delay-locked loops (MDLLs), which differs from the more typical phase-locked loop one, and identifies a design optimization criterion. The methodology is applied to a fractional- <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">${N}$ </tex-math></inline-formula> MDLL with a sub-sampling bang-bang phase detector and a novel digital-to-time converter (DTC) range-reduction technique, which limits the jitter added to the reference signal, at no additional power penalty. The prototype has been implemented in 65-nm CMOS and covers a 1.6-to-3.0-GHz tuning range, achieving an absolute rms jitter (integrated from 30 kHz to 30 MHz) of 397 fs at 2.5-mW power, with a corresponding jitter-power figure of merit of −244 dB. In-band fractional spurs are as low as −51.5 dB and the occupied core area is 0.0275 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> .
Year
DOI
Venue
2019
10.1109/CICC.2019.8780235
IEEE Journal of Solid-state Circuits
Keywords
DocType
Volume
Jitter,Phase locked loops,Bandwidth,Phase noise,Multiplexing,Optimization
Journal
54
Issue
ISSN
ISBN
11
0018-9200
978-1-5386-9396-4
Citations 
PageRank 
References 
7
0.46
5
Authors
5
Name
Order
Citations
PageRank
Alessio Santiccioli1173.01
Mario Mercandelli2154.32
Andrea L. Lacaita332042.41
Carlo Samori434939.76
Salvatore Levantino535143.23