Design of Q-enhanced Class-C VCO with robust start-up and high oscillation stability

被引：5

作者：

Tian, Mi ^{[1
]}

Wang, Zhigong ^{[1
]}

Xu, Jian ^{[1
]}

Zhang, Changchun ^{[2
]}

机构：

[1] Southeast Univ, Inst RF & OE ICs, Nanjing 210096, Jiangsu, Peoples R China

[2] Nanjing Univ Posts & Telecommun, Coll Elect Sci & Engn, Nanjing 210003, Jiangsu, Peoples R China

来源：

IEICE ELECTRONICS EXPRESS | 2014年 / 11卷 / 22期

关键词：

Class-C VCO; quality factor; phase noise; oscillation stability; squegging phenomenon; NOISE;

D O I：

10.1587/elex.11.20140982

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：

A novel topology of Q (quality factor)-enhanced dynamically self-biasing Class-C VCO is proposed in this article. It introduces a bridging capacitor to enhance the quality factor of the oscillator. The enhancement of the quality factor suppresses the squegging phenomenon and the harmonic distortion, and thus improves the phase noise and oscillation stability. The prototype of the proposed circuit was fabricated in SMIC 0.18 mu m CMOS process and the measurement results showed a low phase noise of -125 dBc/Hz@ 1MHz from 3.331 GHz carrier with a total power consumption of 3.36mW from a 1.2V supply. The proposed work exhibited an excellent Figure of Merit (FoM) of -190 dBc/Hz.

引用

页数：9

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