A study of phase noise in colpitts and LC-tank CMOS oscillators
(2005) In IEEE Journal of Solid-State Circuits 40(5). p.1107-1118- Abstract
- This paper presents a study of phase noise in CMOS Colpitts and LC-tank oscillators. Closed-form symbolic formulas for the 1/f/sup 2/ phase-noise region are derived for both the Colpitts oscillator (either single-ended or differential) and the LC-tank oscillator, yielding highly accurate results under very general assumptions. A comparison between the differential Colpitts and the LC-tank oscillator is also carried out, which shows that the latter is capable of a 2-dB lower phase-noise figure-of-merit (FoM) when simplified oscillator designs and ideal MOS models are adopted. Several prototypes of both Colpitts and LC-tank oscillators have been implemented in a 0.35-/spl mu/m CMOS process. The best performance of the LC-tank oscillators... (More)
- This paper presents a study of phase noise in CMOS Colpitts and LC-tank oscillators. Closed-form symbolic formulas for the 1/f/sup 2/ phase-noise region are derived for both the Colpitts oscillator (either single-ended or differential) and the LC-tank oscillator, yielding highly accurate results under very general assumptions. A comparison between the differential Colpitts and the LC-tank oscillator is also carried out, which shows that the latter is capable of a 2-dB lower phase-noise figure-of-merit (FoM) when simplified oscillator designs and ideal MOS models are adopted. Several prototypes of both Colpitts and LC-tank oscillators have been implemented in a 0.35-/spl mu/m CMOS process. The best performance of the LC-tank oscillators shows a phase noise of -142dBc/Hz at 3-MHz offset frequency from a 2.9-GHz carrier with a 16-mW power consumption, resulting in an excellent FoM of /spl sim/189 dBc/Hz. For the same oscillation frequency, the FoM displayed by the differential Colpitts oscillators is /spl sim/5 dB lower. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1049718
- author
- Andreani, Pietro LU ; Wang, Xiaoyan ; Vandi, Luca and Fard, Ali
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- in
- IEEE Journal of Solid-State Circuits
- volume
- 40
- issue
- 5
- pages
- 1107 - 1118
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- external identifiers
-
- scopus:18444372911
- ISSN
- 0018-9200
- DOI
- 10.1109/JSSC.2005.845991
- language
- English
- LU publication?
- no
- id
- e872d195-f5f2-4602-8620-097cc085e948 (old id 1049718)
- date added to LUP
- 2016-04-01 15:40:21
- date last changed
- 2022-04-07 00:12:53
@article{e872d195-f5f2-4602-8620-097cc085e948,
abstract = {{This paper presents a study of phase noise in CMOS Colpitts and LC-tank oscillators. Closed-form symbolic formulas for the 1/f/sup 2/ phase-noise region are derived for both the Colpitts oscillator (either single-ended or differential) and the LC-tank oscillator, yielding highly accurate results under very general assumptions. A comparison between the differential Colpitts and the LC-tank oscillator is also carried out, which shows that the latter is capable of a 2-dB lower phase-noise figure-of-merit (FoM) when simplified oscillator designs and ideal MOS models are adopted. Several prototypes of both Colpitts and LC-tank oscillators have been implemented in a 0.35-/spl mu/m CMOS process. The best performance of the LC-tank oscillators shows a phase noise of -142dBc/Hz at 3-MHz offset frequency from a 2.9-GHz carrier with a 16-mW power consumption, resulting in an excellent FoM of /spl sim/189 dBc/Hz. For the same oscillation frequency, the FoM displayed by the differential Colpitts oscillators is /spl sim/5 dB lower.}},
author = {{Andreani, Pietro and Wang, Xiaoyan and Vandi, Luca and Fard, Ali}},
issn = {{0018-9200}},
language = {{eng}},
number = {{5}},
pages = {{1107--1118}},
publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
series = {{IEEE Journal of Solid-State Circuits}},
title = {{A study of phase noise in colpitts and LC-tank CMOS oscillators}},
url = {{http://dx.doi.org/10.1109/JSSC.2005.845991}},
doi = {{10.1109/JSSC.2005.845991}},
volume = {{40}},
year = {{2005}},
}