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Analysis and design of a 1.8-GHz CMOS LC quadrature VCO

Andreani, Pietro LU ; Bonfanti, A ; Romano, L and Samori, C (2002) In IEEE Journal of Solid-State Circuits 37(12). p.1737-1747
Abstract
This paper presents a quadrature voltage-controlled oscillator (QVCO) based on the coupling of two LC-tank VCOs. A simplified theoretical analysis for the oscillation frequency and phase noise displayed by the QVCO in the 1/f/sup 3/ region is developed, and good agreement is found between theory and simulation results. A prototype for the QVCO was implemented in a 0.35-/spl mu/m CMOS process with three standard metal layers. The QVCO could be tuned between 1.64 and 1.97 GHz, and showed a phase noise of -140 dBc/Hz or less across the tuning range at a 3-MHz offset frequency from the carrier, for a current consumption of 25 mA from a 2-V power supply. The equivalent phase error between I and Q signals was at most 0.25/spl deg/.
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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
IEEE Journal of Solid-State Circuits
volume
37
issue
12
pages
1737 - 1747
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • scopus:0036918499
ISSN
0018-9200
DOI
10.1109/JSSC.2002.804352
language
English
LU publication?
yes
id
a5b395fe-b53f-4625-9cdd-2bd6eb7cb286 (old id 1049725)
date added to LUP
2016-04-01 16:43:35
date last changed
2022-04-07 18:11:25
@article{a5b395fe-b53f-4625-9cdd-2bd6eb7cb286,
  abstract     = {{This paper presents a quadrature voltage-controlled oscillator (QVCO) based on the coupling of two LC-tank VCOs. A simplified theoretical analysis for the oscillation frequency and phase noise displayed by the QVCO in the 1/f/sup 3/ region is developed, and good agreement is found between theory and simulation results. A prototype for the QVCO was implemented in a 0.35-/spl mu/m CMOS process with three standard metal layers. The QVCO could be tuned between 1.64 and 1.97 GHz, and showed a phase noise of -140 dBc/Hz or less across the tuning range at a 3-MHz offset frequency from the carrier, for a current consumption of 25 mA from a 2-V power supply. The equivalent phase error between I and Q signals was at most 0.25/spl deg/.}},
  author       = {{Andreani, Pietro and Bonfanti, A and Romano, L and Samori, C}},
  issn         = {{0018-9200}},
  language     = {{eng}},
  number       = {{12}},
  pages        = {{1737--1747}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  series       = {{IEEE Journal of Solid-State Circuits}},
  title        = {{Analysis and design of a 1.8-GHz CMOS LC quadrature VCO}},
  url          = {{http://dx.doi.org/10.1109/JSSC.2002.804352}},
  doi          = {{10.1109/JSSC.2002.804352}},
  volume       = {{37}},
  year         = {{2002}},
}