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On the amplitude and phase errors of quadrature LC-tank CMOS oscillators

Mazzanti, Andrea; Svelto, Francesco and Andreani, Pietro LU (2006) In IEEE Journal of Solid-State Circuits 41(6). p.1305-1313
Abstract
An analytic approach for the estimation of the phase and amplitude imbalances caused by component mismatches and parasitic magnetic fields in two popular quadrature LC oscillators is presented. Very simple and closed-form equations are derived, proving that, although the two topologies share the same small signal circuit, they display very different sensitivities to the mentioned sources of imbalance. Moreover, it is shown that parasitic inductors coupling, overlooked up to date, plays a key role ultimately limiting the achievable phase accuracy. The theoretical results are verified through extensive simulations and measurements on a 1.7-GHz quadrature oscillator and frequency up-converter implemented in a 0.18-/spl mu/m CMOS process.
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 radio frequency integrated circuits image rejection local oscillators phase accuracy quadrature voltage-controlled oscillators (QVCOs)
in
IEEE Journal of Solid-State Circuits
volume
41
issue
6
pages
1305 - 1313
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • Scopus:33746612492
ISSN
0018-9200
DOI
10.1109/JSSC.2006.874333
language
English
LU publication?
yes
id
0551c59a-77b8-4e8e-b7aa-d31ef58f3b84 (old id 1050912)
alternative location
http://ieeexplore.ieee.org/iel5/4/34322/01637595.pdf
date added to LUP
2008-03-27 15:10:50
date last changed
2016-11-06 04:26:25
@misc{0551c59a-77b8-4e8e-b7aa-d31ef58f3b84,
  abstract     = {An analytic approach for the estimation of the phase and amplitude imbalances caused by component mismatches and parasitic magnetic fields in two popular quadrature LC oscillators is presented. Very simple and closed-form equations are derived, proving that, although the two topologies share the same small signal circuit, they display very different sensitivities to the mentioned sources of imbalance. Moreover, it is shown that parasitic inductors coupling, overlooked up to date, plays a key role ultimately limiting the achievable phase accuracy. The theoretical results are verified through extensive simulations and measurements on a 1.7-GHz quadrature oscillator and frequency up-converter implemented in a 0.18-/spl mu/m CMOS process.},
  author       = {Mazzanti, Andrea and Svelto, Francesco and Andreani, Pietro},
  issn         = {0018-9200},
  keyword      = {CMOS radio frequency integrated circuits   image rejection   local oscillators   phase accuracy   quadrature voltage-controlled oscillators (QVCOs)},
  language     = {eng},
  number       = {6},
  pages        = {1305--1313},
  publisher    = {ARRAY(0x8fa9930)},
  series       = {IEEE Journal of Solid-State Circuits},
  title        = {On the amplitude and phase errors of quadrature LC-tank CMOS oscillators},
  url          = {http://dx.doi.org/10.1109/JSSC.2006.874333},
  volume       = {41},
  year         = {2006},
}