The effect of parameter mismatches on the output waveform of an LC-VCO

被引：20

作者：

Buonomo, Antonio ^{[1
]}

Lo Schiavo, Alessandro ^{[1
]}

机构：

[1] Univ Naples 2, Fac Ingn, I-81031 Aversa, CE, Italy

来源：

INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS | 2010年 / 38卷 / 05期

关键词：

nonlinear circuits; nonlinear oscillators; perturbation methods; voltage-controlled oscillators; locked oscillators; OSCILLATORS;

D O I：

10.1002/cta.580

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：

The effect of parameter mismatches on the output waveforms of a popular voltage-controlled oscillator is investigated, schematizing the circuit as a system of two mutually coupled oscillators, whose describing equations are derived in a perturbation form. The circuit is studied using the method of two time-scales showing the existence of synchronization phenomena leading in presence of mismatches to a locking frequency, which significantly differs from the natural frequencies of the tanks, and to an oscillation amplitude different from that of the symmetric case. We also show that in-phase and quadrature oscillations at the drain nodes can be generated with a proper parameter setting. Circuit simulations confirm the presence of a synchronized oscillation, which is consistent with the prediction of the presented analysis. Copyright (C) 2009 John Wiley & Sons, Ltd

引用

页码：487 / 501

页数：15

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