A study of phase noise in colpitts and LC-tank CMOS oscillators

Publication: Research - peer-review › Journal article – Annual report year: 2005

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A study of phase noise in colpitts and LC-tank CMOS oscillators. / Andreani, Pietro ; Wang, Xiaoyan ; Vandi, Luca; Fard, A.

In: I E E E Journal of Solid State Circuits, Vol. 40, No. 5, 2005, p. 1107-1118.

Publication: Research - peer-review › Journal article – Annual report year: 2005

In: I E E E Journal of Solid State Circuits, Vol. 40, No. 5, 2005, p. 1107-1118.

Publication: Research - peer-review › Journal article – Annual report year: 2005

Bibtex

@article{6f7cede2102c48dbbce1b311a6d1fb04,

title = "A study of phase noise in colpitts and LC-tank CMOS oscillators",

publisher = "I E E E",

author = "Pietro Andreani and Xiaoyan Wang and Luca Vandi and A. Fard",

note = "Copyright: 2005 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE",

year = "2005",

volume = "40",

number = "5",

pages = "1107--1118",

journal = "I E E E Journal of Solid State Circuits",

issn = "0018-9200",

}

RIS

TY - JOUR

T1 - A study of phase noise in colpitts and LC-tank CMOS oscillators

A1 - Andreani,Pietro

A1 - Wang,Xiaoyan

A1 - Vandi,Luca

A1 - Fard,A.

AU - Andreani,Pietro

AU - Wang,Xiaoyan

AU - Vandi,Luca

AU - Fard,A.

PB - I E E E

PY - 2005

Y1 - 2005

N2 - This paper presents a study of phase noise in CMOS Colpitts and LC-tank oscillators. Closed-form symbolic formulas for the 1/f(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-mu m CMOS process. The best performance of the LC-tank oscillators shows a phase noise of -142 dBc/Hz at 3-MHz offset frequency from a 2.9-GHz carrier with a 16-mW power consumption, resulting in an excellent FoM of similar to 189 dBc/Hz. For the same oscillation frequency, the FoM displayed by the differential Colpitts oscillators is similar to 5 dB lower.

AB - This paper presents a study of phase noise in CMOS Colpitts and LC-tank oscillators. Closed-form symbolic formulas for the 1/f(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-mu m CMOS process. The best performance of the LC-tank oscillators shows a phase noise of -142 dBc/Hz at 3-MHz offset frequency from a 2.9-GHz carrier with a 16-mW power consumption, resulting in an excellent FoM of similar to 189 dBc/Hz. For the same oscillation frequency, the FoM displayed by the differential Colpitts oscillators is similar to 5 dB lower.

KW - LC-tank

KW - Colpitts

KW - CMOS

KW - phase noise

KW - oscillators

U2 - 10.1109/JSSC.2005.845991

DO - 10.1109/JSSC.2005.845991

JO - I E E E Journal of Solid State Circuits

JF - I E E E Journal of Solid State Circuits

SN - 0018-9200

IS - 5

VL - 40

SP - 1107

EP - 1118

ER -