Concepts and methods in optimization of integrated LC VCOs

被引：461

作者：

Ham, D ^{[1
]}

Hajimiri, A ^{[1
]}

机构：

[1] CALTECH, Dept Elect Engn, Pasadena, CA 91125 USA

来源：

IEEE JOURNAL OF SOLID-STATE CIRCUITS | 2001年 / 36卷 / 06期

关键词：

analog integrated circuits; CMOS integrated circuits; LC oscillators; optimization; phase noise; radio frequency; voltage-controlled oscillators;

D O I：

10.1109/4.924852

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Underlying physical mechanisms controlling the noise properties of oscillators are studied, This treatment shows the importance of inductance selection for oscillator noise optimization. A design strategy centered around an inductance selection scheme is executed using a practical graphical optimization method to optimize phase noise subject to design constraints such as power dissipation, tank amplitude, tuning range, startup condition, and diameters of spiral inductors, The optimization technique is demonstrated through a design example, leading to a 2,4-GHz fully integrated, LC voltage-controlled oscillator (VCO) implemented using 0.35-mum MOS transistors. The measured phase-noise values are - 121, - 117, and - 115 dBc/Hz at 600-kHz offset from 1.91, 2.03, and 2.60-GHz carriers, respectively The VCO dissipates 4 mA from a 2.5-V supply voltage. The inversion mode MOSCAP tuning is used to achieve 26% of tuning range, Two figures of merit for performance comparison of various oscillators are introduced and used to compare this work to previously reported results.

引用

页码：896 / 909

页数：14

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