Paper Info
Title
A 1-mW 1.13–1.9 GHz CMOS LC VCO Using Shunt-Connected Switched-Coupled Inductors
Abstract
A low-power wideband LC VCO has been designed and implemented in a 90-nm CMOS technology. Wide tuning range, low phase noise and low power consumption are achieved thanks to the adopted LC tank, which makes use of shunt-connected switched-coupled inductors and a proper arrangement of varactors. The shunt-connected switched-coupled inductors provide coarse tuning and phase noise optimization without using amplitude calibration loop or trimming of the bias current. The proposed varactors configuration employs accumulation mode thin and thick MOS devices, which has been differently biased to obtain tuning range maximization along with minimization of the amplitude-to-phase noise conversion. The LC-tank topology and inductor layout have been properly designed to attain a die area comparable to a single-inductor VCO, taking advantage of the inductors mutual coupling. The VCO exhibits a phase noise at 1-MHz offset frequency lower than -114 dBc/Hz over the entire tuning range and achieves -126.1 dBc/Hz at 1.2 GHz. It provides a tuning range of 51% from 1.13 GHz to 1.9 GHz with a tuning voltage ranging from 0 to 1.2 V. Despite a very low current consumption, which is 0.88 mA from a 1.2-V supply, the proposed VCO has the outstanding PFTN figure-of-merit of 10. The VCO core die area is 0.5 mm2.
Year
DOI
Venue
2012
10.1109/TCSI.2011.2173383
Circuits and Systems I: Regular Papers, IEEE Transactions
Keywords
DocType
Volume
CMOS integrated circuits,LC circuits,circuit tuning,inductors,integrated circuit design,low-power electronics,phase noise,varactors,voltage-controlled oscillators,CMOS LC VCO,CMOS technology,LC-tank topology,MOS devices,accumulation mode,adopted LC tank,amplitude calibration loop,amplitude-to-phase noise conversion,bias current,coarse tuning,current 0.88 mA,die area,frequency 1.13 GHz to 1.9 GHz,inductor layout,inductors mutual coupling,low phase noise,low power consumption,low-power wideband LC VCO,phase noise optimization,power 1 mW,shunt-connected switched-coupled inductors,single-inductor VCO,size 90 nm,tuning range maximization,varactors configuration,voltage 0 V to 1.2 V,wide tuning range,CMOS voltage controlled oscillators,low-power circuits,phase noise,switched inductors,tuning range,wireless sensor networks
Journal
59
Issue
ISSN
Citations 
6
1549-8328
8
PageRank 
References 
Authors
0.72
18
3
Name
Order
Citations
PageRank
Alessandro Italia1143.63
Calogero Marco Ippolito280.72
Giuseppe Palmisano320926.26