DocumentCode :
1132776
Title :
Design and Analysis of Actively-Deskewed Resonant Clock Networks
Author :
Xu, Zheng ; Shepard, Kenneth L.
Author_Institution :
Boston Design Center, Boston, MA
Volume :
44
Issue :
2
fYear :
2009
Firstpage :
558
Lastpage :
568
Abstract :
Active deskewing is an important technique for managing variability in clock distributions but introduces latency and power-supply-noise sensitivity into the resulting networks. In this paper, an adaptively deskewed resonant clock network, based on an injection-locked distributed differential oscillator, is described, in which the delay lines required for deskewing are incorporated into the injection-lock source, dramatically improving jitter immunity. A power management system based on automatic amplitude control of the resonant grid further enhances energy efficiency. A prototype system operates at a nominal 2-GHz frequency in a 0.18 mum technology with on-chip jitter and skew measurement circuits and with more than 25 pF/mm2 of clock loading.
Keywords :
clocks; delay lines; injection locked oscillators; power supply circuits; timing jitter; active deskewing; actively-deskewed resonant clock networks; automatic amplitude control; clock distributions; clock loading; delay lines; injection-lock source; injection-locked distributed differential oscillator; jitter immunity; on-chip jitter; power management system; power-supply-noise sensitivity; resonant grid; skew measurement circuits; Automatic control; Clocks; Control systems; Delay lines; Energy efficiency; Energy management; Injection-locked oscillators; Jitter; Power system management; Resonance; Clocking; clock; deskew; filtering; jitter; power; resonant; resonant clocking; skew;
fLanguage :
English
Journal_Title :
Solid-State Circuits, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9200
Type :
jour
DOI :
10.1109/JSSC.2008.2010760
Filename :
4768887
Link To Document :
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