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An analysis of 1/f2 phase noise in bipolar colpitts oscillators (With a digression on bipolar differential-pair LC oscillators)

Fard, Ali and Andreani, Pietro LU (2007) In IEEE Journal of Solid-State Circuits 42(2). p.374-384
Abstract
This work presents an analysis of phase noise in the 1/f(2) region displayed by both single-ended and differential bipolar Colpitts oscillators. Very accurate and rigorous symbolic phase noise expressions are derived, enabling a deeper insight into the major mechanisms of phase noise generation, and providing new tools for design optimization. Phase noise expressions for the cross-coupled differential-pair LC-tank oscillator are derived as well.

The theoretical analysis is validated on a 3 GHz differential bipolar Colpitts VCO implemented in a 0.35 mu m SiGe process. Measurements show a phase noise of -123 dBc/Hz or less at 1 MHz offset frequency from the 2.8-3.1 GHz carrier, for a phase noise figure-of-merit of at least 183... (More)
This work presents an analysis of phase noise in the 1/f(2) region displayed by both single-ended and differential bipolar Colpitts oscillators. Very accurate and rigorous symbolic phase noise expressions are derived, enabling a deeper insight into the major mechanisms of phase noise generation, and providing new tools for design optimization. Phase noise expressions for the cross-coupled differential-pair LC-tank oscillator are derived as well.

The theoretical analysis is validated on a 3 GHz differential bipolar Colpitts VCO implemented in a 0.35 mu m SiGe process. Measurements show a phase noise of -123 dBc/Hz or less at 1 MHz offset frequency from the 2.8-3.1 GHz carrier, for a phase noise figure-of-merit of at least 183 dBc/Hz across the tuning range. A very good agreement between theory, numerical simulations, and. measurements is observed. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
IEEE Journal of Solid-State Circuits
volume
42
issue
2
pages
374 - 384
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • Scopus:33847713392
ISSN
0018-9200
DOI
10.1109/JSSC.2006.889388
language
English
LU publication?
no
id
6a6676a8-d096-4b1b-a80f-22c5c144ca69 (old id 1051557)
alternative location
http://ieeexplore.ieee.org/iel5/4/4077153/04077159.pdf
date added to LUP
2008-04-03 12:59:59
date last changed
2016-11-06 04:24:57
@misc{6a6676a8-d096-4b1b-a80f-22c5c144ca69,
  abstract     = {This work presents an analysis of phase noise in the 1/f(2) region displayed by both single-ended and differential bipolar Colpitts oscillators. Very accurate and rigorous symbolic phase noise expressions are derived, enabling a deeper insight into the major mechanisms of phase noise generation, and providing new tools for design optimization. Phase noise expressions for the cross-coupled differential-pair LC-tank oscillator are derived as well.<br/><br>
The theoretical analysis is validated on a 3 GHz differential bipolar Colpitts VCO implemented in a 0.35 mu m SiGe process. Measurements show a phase noise of -123 dBc/Hz or less at 1 MHz offset frequency from the 2.8-3.1 GHz carrier, for a phase noise figure-of-merit of at least 183 dBc/Hz across the tuning range. A very good agreement between theory, numerical simulations, and. measurements is observed.},
  author       = {Fard, Ali and Andreani, Pietro},
  issn         = {0018-9200},
  language     = {eng},
  number       = {2},
  pages        = {374--384},
  publisher    = {ARRAY(0x97eb050)},
  series       = {IEEE Journal of Solid-State Circuits},
  title        = {An analysis of 1/f2 phase noise in bipolar colpitts oscillators (With a digression on bipolar differential-pair LC oscillators)},
  url          = {http://dx.doi.org/10.1109/JSSC.2006.889388},
  volume       = {42},
  year         = {2007},
}