半导体学报（英文版）2012，Vol.33Issue(5)：99-104,6.DOI:10.1088/1674-4926/33/5/055003
Design of a CMOS multi-mode GNSS receiver VCO
Design of a CMOS multi-mode GNSS receiver VCO
Long Qiang 1Zhuang Yiqi 1Yin Yue 1Li Zhenrong1
作者信息
- 1. National Key Laboratory of Wide Band-Gap Semiconductor Technology, School of Microelectronics, Xidian University, Xi'an 710071, China
- 折叠
摘要
Abstract
A voltage-controlled oscillator (VCO) with dual stages of accumulation mode varactors for a multimode global navigation satellite system (GNSS) application,which adopts sigma-delta fractional-N technology in the synthesizer,is presented.The structure is selected to optimize the frequency coverage and tuning linearity,based on a general analysis of the parasitic capacitance in the coarse tuning switch bank cells,which cover the global positioning system (GPS) and Beidou (BD) bands.The VCO implemented in the 0.18 μm CMOS process can cover the GPS L1,BD B1,B2 and B3 bands with sufficient margin,and exhibits low phase noise by using this tuning curve linearization technique.The equalized Kvco characteristic behavior further offers a wide voltage tuning range and improves the stability of the closed loop.关键词
VCO/ phase noise/ GPS/ tuning linearity/ GNSS/ multi-modeKey words
VCO/ phase noise/ GPS/ tuning linearity/ GNSS/ multi-mode引用本文复制引用
Long Qiang,Zhuang Yiqi,Yin Yue,Li Zhenrong..Design of a CMOS multi-mode GNSS receiver VCO[J].半导体学报（英文版）,2012,33(5):99-104,6.
