A fully integrated CMOS VCXO-IC with low phase noise, wide tuning range and high tuning linearity

被引：0

作者：

杨艳军 ^{[1
]}

曾云 ^{[1
]}

机构：

[1] School of Physics and Electronics, Hunan University

来源：

Journal of Semiconductors | 2015年 / 06期

基金：

中国国家自然科学基金;

关键词：

VCXO; varactor; linear frequency tuning; low phase noise;

D O I：

暂无

中图分类号：

TN752 [振荡器];

学科分类号：

080904 ;

摘要：

This paper describes a low phase noise, wide tuning range and high tuning linearity CMOS voltage controlled crystal oscillator IC(VCXO-IC) with LVCMOS and LVPECL output. A differential coupled frequency doubling Colpitts oscillator is adopted to obtain low noise 2 frequency output. Wide tuning range and high linearity are simultaneously achieved by using MOS varactor arrays. The measurement results show that the designed VCXO-IC achieves 134 d Bc/Hz phase noise at 1 k Hz offset frequency and˙135 ppm output frequency tuning range within 3% linearity by using 40 MHz fundamental AT-cut crystal. The VCXO-IC is fabricated in the chartered0.35 m standard CMOS process and occupies a total silicon area of 2.4 mm2.

引用

页码：152 / 159

页数：8