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Analysis and design of a double-quadrature CMOS VCO for subharmonic mixing at Ka-band

Mazzanti, Andrea; Sacchi, Enrico; Andreani, Pietro LU and Svelto, Francesco (2008) In IEEE Transactions on Microwave Theory and Techniques 56(2). p.355-363
Abstract
In this paper, we analyze the potentials of a four-phase 14-GHz CMOS voltage-controlled oscillator, tailored to a sub-harmonic receiver, for signal processing at Ka-band. When mild phase accuracies between in-phase and quadrature down-converted signals are required, the four-phase oscillator displays roughly the same phase noise figure-of-merit as quadrature oscillator counterparts. However, the operation at half-frequency leads to an improved performance due to a higher quality factor of the tuning varactors, and because the local oscillator circuitry and signal path run at different frequencies, relaxing coupling issues. A detailed time-variant analysis of phase noise in multiphase oscillators is introduced and validated by both... (More)
In this paper, we analyze the potentials of a four-phase 14-GHz CMOS voltage-controlled oscillator, tailored to a sub-harmonic receiver, for signal processing at Ka-band. When mild phase accuracies between in-phase and quadrature down-converted signals are required, the four-phase oscillator displays roughly the same phase noise figure-of-merit as quadrature oscillator counterparts. However, the operation at half-frequency leads to an improved performance due to a higher quality factor of the tuning varactors, and because the local oscillator circuitry and signal path run at different frequencies, relaxing coupling issues. A detailed time-variant analysis of phase noise in multiphase oscillators is introduced and validated by both simulations and experiments. Prototypes realized in a 65-nm technology occupy an active area of 0.5 mm2 and show the following performances: a 26% frequency tuning range (from 12.2 to 15.9 GHz), maximum phase error from pi/4 of 2deg, and a phase noise of -110 dBc/Hz at 1 MHz from 14 GHz, while consuming 18 mA from 0.8-V supply. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
CMOS direct conversion local oscillator (LO) generation millimeter waves multiphase phase noise subharmonic receivers voltage-controlled oscillator (VCO)
in
IEEE Transactions on Microwave Theory and Techniques
volume
56
issue
2
pages
355 - 363
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • WOS:000253084800012
  • Scopus:38949100808
ISSN
0018-9480
DOI
10.1109/TMTT.2007.914365
language
English
LU publication?
yes
id
b804b207-7e1b-4fc8-aee2-8e50c5c87997 (old id 1050671)
alternative location
http://ieeexplore.ieee.org/iel5/22/4446042/04428279.pdf?tp=&arnumber=4428279&isnumber=4446042
date added to LUP
2008-03-27 13:21:43
date last changed
2016-10-13 04:29:19
@misc{b804b207-7e1b-4fc8-aee2-8e50c5c87997,
  abstract     = {In this paper, we analyze the potentials of a four-phase 14-GHz CMOS voltage-controlled oscillator, tailored to a sub-harmonic receiver, for signal processing at Ka-band. When mild phase accuracies between in-phase and quadrature down-converted signals are required, the four-phase oscillator displays roughly the same phase noise figure-of-merit as quadrature oscillator counterparts. However, the operation at half-frequency leads to an improved performance due to a higher quality factor of the tuning varactors, and because the local oscillator circuitry and signal path run at different frequencies, relaxing coupling issues. A detailed time-variant analysis of phase noise in multiphase oscillators is introduced and validated by both simulations and experiments. Prototypes realized in a 65-nm technology occupy an active area of 0.5 mm2 and show the following performances: a 26% frequency tuning range (from 12.2 to 15.9 GHz), maximum phase error from pi/4 of 2deg, and a phase noise of -110 dBc/Hz at 1 MHz from 14 GHz, while consuming 18 mA from 0.8-V supply.},
  author       = {Mazzanti, Andrea and Sacchi, Enrico and Andreani, Pietro and Svelto, Francesco},
  issn         = {0018-9480},
  keyword      = {CMOS direct conversion   local oscillator (LO) generation   millimeter waves   multiphase   phase noise   subharmonic receivers   voltage-controlled oscillator (VCO)},
  language     = {eng},
  number       = {2},
  pages        = {355--363},
  publisher    = {ARRAY(0x5c4dcf0)},
  series       = {IEEE Transactions on Microwave Theory and Techniques},
  title        = {Analysis and design of a double-quadrature CMOS VCO for subharmonic mixing at Ka-band},
  url          = {http://dx.doi.org/10.1109/TMTT.2007.914365},
  volume       = {56},
  year         = {2008},
}