Q-enhanced 5GHz CMOS VCO using 4-port transformer

被引：3
|
作者：
Lee, Young Tae [1 ]
Kim, Cheon Soo [1 ]
机构：
[1] ETRI, RF Analog SoC Design Team, Taejon 305700, South Korea
来源：
2007 TOPICAL MEETING ON SILICON MONOLITHIC INTEGRATED CIRCUITS IN RF SYSTEMS, DIGEST OF PAPERS | 2007年
关键词：
CMOS; LC resonators; quality factor; transformer; voltage controlled oscillator;
D O I：
10.1109/SMIC.2007.322795
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 LC VCO having oscillation frequency of 5GHz and using the transformer-coupled LC tank in 0.13 mu m CMOS technology is developed. The LC tank that employs the drain-gate transformer feedback configuration is composed of a 4-port transformer and varactor diodes. The transformer has the quality factor increased by 1+k where k is the coupling factor between each port and it is characterized to propose the equivalent circuit for the 2-port transformer using the measured S-parameters. The measured phase noise of LC VCO is -110dBc/Hz at the offset frequency of 1MHz and the tuning range of 450MHz is achieved.
引用
收藏
页码：119 / +
页数：2
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