Design and realization of an ultra-low-power low-phase-noise CMOS LC-VCO

A fully integrated cross-coupled LC tank voltage-controlled oscillator（LC-VCO） using transformer feedback is proposed to achieve a low phase noise and ultra-low-power design even at a supply below the threshold voltage. The ultra-low-power VCO is implemented in the mixed-signal and RF 1P6M 0.18-μm C...

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Bibliographic Details
Published inJournal of semiconductors Vol. 31; no. 8; pp. 137 - 140
Main Author 吴秀山 王志功 李智群 夏峻 李青
Format Journal Article
LanguageChinese
English
Published IOP Publishing 01.08.2010
Subjects
CMOS技术
LC谐振
VCO
交叉耦合
低相位噪声
压控振荡器
电压控制振荡器
超低功耗设计
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Summary:A fully integrated cross-coupled LC tank voltage-controlled oscillator（LC-VCO） using transformer feedback is proposed to achieve a low phase noise and ultra-low-power design even at a supply below the threshold voltage. The ultra-low-power VCO is implemented in the mixed-signal and RF 1P6M 0.18-μm CMOS technology of SMIC. The measured phase noise is-125.3 dBc/Hz at an offset frequency of 1 MHz from a carrier of 2.433 GHz,while the VCO core circuit draws only 640μW from a 0.4-V supply.The designed VCO can cover a frequency range from 2.28 to 2.48 GHz.The tuning range of the circuit is 200 MHz（8.7%） and the FOM is-195.7 dB,which is suitable for an IEEE 802.11b receiver.
Bibliography:feedback
TP212.11
low phase noise; low-power transformer; voltage-controlled oscillator; feedback
low phase noise
TN912.3
low-power transformer
11-5781/TN
voltage-controlled oscillator
ISSN:1674-4926
DOI:10.1088/1674-4926/31/8/085007