A low supply voltage and wide-tuned CMOS Colpitts VCO

被引：3

作者：

Hong, Jong-Phil ^{[1
]}

机构：

[1] Chungbuk Natl Univ, Sch Elect Engn, Cheongju 361763, South Korea

来源：

IEICE ELECTRONICS EXPRESS | 2014年 / 11卷 / 13期

基金：

新加坡国家研究基金会;

关键词：

Colpitts; differential; low supply; voltage controlled oscillator; frequency tuning range;

D O I：

10.1587/elex.11.20140428

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：

This paper presents a g(m)-boosted differential Colpitts VCO with a switched capacitor tuning scheme which achieves low phase noise and a wide tuning range at a low supply voltage. In the proposed VCO, a voltage boosting circuit increases a turn-on resistance of the switching transistor for the capacitor array by generating higher gate bias voltage. As a result, the proposed VCO can achieve a wide frequency tuning range at a low supply voltage. The proposed VCO is implemented with 0.18-mu m CMOS technology and oscillates from 3.60 to 4.14 GHz. Measurement results indicate a phase noise of -123.65 dBc/Hz at 1-MHz offset at 3.63 GHz, while dissipating 2.53mA from the 0.7-V supply.

引用

页数：6

共 4 条

[1] Gm-Boosted Differential Drain-to-Source Feedback Colpitts CMOS VCO [J].