Advanced

A filtering technique to lower LC oscillator phase noise

Hegazi, Emad; Sjöland, Henrik LU and Abidi, Asad (2001) In IEEE Journal of Solid-State Circuits 36(12). p.1921-1930
Abstract
Based on a physical understanding of phase-noise mechanisms, a passive LC filter is found to lower the phase-noise factor in a differential oscillator to its fundamental minimum. Three fully integrated LC voltage-controlled oscillators (VCOs) serve as a proof of concept. Two 1.1-GHz VCOs achieve -153 dBc/Hz at 3 MHz offset, biased at 3.7 mA from 2.5 V. A 2.1-GHz VCO achieves -148 dBc/Hz at 15 MHz offset, taking 4 mA from a 2.7-V supply. All oscillators use fully integrated resonators, and the first two exceed discrete transistor modules in figure of merit. Practical aspects and repercussions of the technique are discussed.
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
UHF oscillators, passive filters, phase noise, voltage-controlled oscillators
in
IEEE Journal of Solid-State Circuits
volume
36
issue
12
pages
1921 - 1930
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • scopus:0035696224
ISSN
0018-9200
DOI
10.1109/4.972142
language
English
LU publication?
yes
id
c3a118fd-c8d5-40f7-80f7-0503dfaab42c (old id 1244430)
date added to LUP
2008-10-07 09:55:33
date last changed
2018-12-09 04:07:29
@article{c3a118fd-c8d5-40f7-80f7-0503dfaab42c,
  abstract     = {Based on a physical understanding of phase-noise mechanisms, a passive LC filter is found to lower the phase-noise factor in a differential oscillator to its fundamental minimum. Three fully integrated LC voltage-controlled oscillators (VCOs) serve as a proof of concept. Two 1.1-GHz VCOs achieve -153 dBc/Hz at 3 MHz offset, biased at 3.7 mA from 2.5 V. A 2.1-GHz VCO achieves -148 dBc/Hz at 15 MHz offset, taking 4 mA from a 2.7-V supply. All oscillators use fully integrated resonators, and the first two exceed discrete transistor modules in figure of merit. Practical aspects and repercussions of the technique are discussed.},
  author       = {Hegazi, Emad and Sjöland, Henrik and Abidi, Asad},
  issn         = {0018-9200},
  keyword      = {UHF oscillators,passive filters,phase noise,voltage-controlled oscillators},
  language     = {eng},
  number       = {12},
  pages        = {1921--1930},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  series       = {IEEE Journal of Solid-State Circuits},
  title        = {A filtering technique to lower LC oscillator phase noise},
  url          = {http://dx.doi.org/10.1109/4.972142},
  volume       = {36},
  year         = {2001},
}