Nonlinear analysis of a cross-coupled quadrature harmonic oscillator

被引：16

作者：

Djurhuus, T ^{[1
]}

Krozer, V ^{[1
]}

Vidkjær, J ^{[1
]}

Johansen, TK ^{[1
]}

机构：

[1] Tech Univ Denmark, Dept Electromagnet Syst, Orsted DTU, DK-2800 Lyngby, Denmark

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS | 2005年 / 52卷 / 11期

关键词：

AM-to-PM noise conversion; LC oscillator; nonlinear analysis; phase error; phase noise; quadrature oscillator;

D O I：

10.1109/TCSI.2005.853586

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 dynamic equations governing the cross-coupled quadrature harmonic oscillator are derived assuming quasi-sinusoidal operation. This allows for an investigation of the previously reported tradeoff between close-to-carrier phase noise and quadrature precision. The results explain how nonlinearity in the coupling transconductances, in conjunction with a finite amplitude relaxation time and de-tuning of the individual oscillators, cause close-to-carrier AM-to-PNI noise conversion. A discussion is presented of how the theoretic results translate into design rules for quadrature oscillator ICs. SPECTRE RF simulations verify the developed theory.

引用

页码：2276 / 2285

页数：10

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