A 57-GHz CMOS VCO WITH 185.3% TUNING-RANGE ENHANCEMENT USING TUNABLE LC SOURCE-DEGENERATION

被引：3

作者：

Tsou, Chuan-Wei ^{[1
]}

Chen, Chi-Chen ^{[1
]}

Lin, Yo-Sheng ^{[1
]}

机构：

[1] Natl Chi Nan Univ, Dept Elect Engn, Puli, Taiwan

来源：

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS | 2009年 / 51卷 / 11期

关键词：

index tersmillimeter-wave; CMOS; VCO; tuning range; tunable; LC source-degeneration;

D O I：

10.1002/mop.24706

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 57-GHz CMOS voltage-controlled oscillator (VCO) using tunable LC source-degeneration for operation frequency and tuning-range enhancement is demonstrated. The tunable LC source-degeneration is made by adding two tunable LC tanks, where varactors are used as the needed capacitors, to the source terminals of the cross-coupled transistor pair of the VCO. Compared with the traditional cross-coupled transistor pair, the proposed one significantly decreases the equivalent parallel capacitance (C-EQ). This in turn results in the increase of both the operation frequency and the tuning range of the VCO. The measurement result shows the tunable LC source-degeneration achieved a 185.3% enhancement [from 1.36 GHz (53.36-54.72 GHz) to 3.88 GHz (53.36-57.24 GHz)] in tuning range by tuning the varactors of the proposed cross-coupled transistor pair. (C) 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2682-2685, 2009: Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24706

引用

页码：2682 / 2684

页数：3

共 4 条

[1] Millimeter-wave voltage-controlled oscillators in 0.13-μm CMOS technology [J].