Advanced

Tail current noise suppression in RF CMOS VCOs

Andreani, Pietro LU and Sjöland, Henrik LU (2002) In IEEE Journal of Solid-State Circuits 37(3). p.342-348
Abstract
This paper presents the experimental results of two different techniques, inductive degeneration and capacitive filtering, for reducing the phase noise in tail-biased RF CMOS voltage-controlled oscillators (VCOs). Both techniques prevent the low-frequency tail current noise from being converted into phase noise. The techniques are applied to two distinct VCO designs, showing that the largest phase noise reduction (up to 6-7 dB at 3-MHz offset frequency from the carrier) is achieved via inductive degeneration. Capacitive filtering, however, also substantially reduces the phase noise at high offset frequencies and may therefore become a valid alternative to inductive degeneration, as discrete capacitors are of more common use than discrete... (More)
This paper presents the experimental results of two different techniques, inductive degeneration and capacitive filtering, for reducing the phase noise in tail-biased RF CMOS voltage-controlled oscillators (VCOs). Both techniques prevent the low-frequency tail current noise from being converted into phase noise. The techniques are applied to two distinct VCO designs, showing that the largest phase noise reduction (up to 6-7 dB at 3-MHz offset frequency from the carrier) is achieved via inductive degeneration. Capacitive filtering, however, also substantially reduces the phase noise at high offset frequencies and may therefore become a valid alternative to inductive degeneration, as discrete capacitors are of more common use than discrete inductors. (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
phase noise, CMOS, VCO, RF
in
IEEE Journal of Solid-State Circuits
volume
37
issue
3
pages
342 - 348
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • wos:000174099700011
  • scopus:0036504292
ISSN
0018-9200
DOI
10.1109/4.987086
language
English
LU publication?
yes
id
d1766ae0-11a2-4624-a7d4-30a865c3e19b (old id 342917)
date added to LUP
2007-08-07 11:15:05
date last changed
2017-11-19 04:07:51
@article{d1766ae0-11a2-4624-a7d4-30a865c3e19b,
  abstract     = {This paper presents the experimental results of two different techniques, inductive degeneration and capacitive filtering, for reducing the phase noise in tail-biased RF CMOS voltage-controlled oscillators (VCOs). Both techniques prevent the low-frequency tail current noise from being converted into phase noise. The techniques are applied to two distinct VCO designs, showing that the largest phase noise reduction (up to 6-7 dB at 3-MHz offset frequency from the carrier) is achieved via inductive degeneration. Capacitive filtering, however, also substantially reduces the phase noise at high offset frequencies and may therefore become a valid alternative to inductive degeneration, as discrete capacitors are of more common use than discrete inductors.},
  author       = {Andreani, Pietro and Sjöland, Henrik},
  issn         = {0018-9200},
  keyword      = {phase noise,CMOS,VCO,RF},
  language     = {eng},
  number       = {3},
  pages        = {342--348},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  series       = {IEEE Journal of Solid-State Circuits},
  title        = {Tail current noise suppression in RF CMOS VCOs},
  url          = {http://dx.doi.org/10.1109/4.987086},
  volume       = {37},
  year         = {2002},
}