A high dynamic range SiGe HBT variable gain amplifier for WCDMA applications - 文章详情页

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EI Scopus

摘要：

A　high　dynamic　range　linear-in-dB　variable　gain　amplifier　(VGA)　using　SiGe　HBT　devices　for　WCDMA　applications　is　presented　in　this　paper.　The　gain　is　achieved　through　four　stages　of　amplifiers.　The　first,　third　and　the　fourth　stage　is　the　normal　amplify　stage,　and　the　second　stage　is　the　gain　control　stage.　The　gain　control　is　implemented　by　adjusting　the　bias　of　the　second　amplifier.　The　VGA　is　driven　by　a　2.7-V　power　supply,　and　has　a　49dB　linear　gain　control　range　varying　from　11dB　to　60dB　when　control　voltage　varies　from　0　to　2.7V.　The　maximum　gain　is　60dB　at　the　frequency　of　1.95GHz,　the　noise　figure　is　4.685dB　at　maximum　gain,　input/output　VSWRs　keep　low　and　constant.　The　VGA　is　fabricated　in　a　0.35　μm　fT　=　43　GHz　silicon　germanium　heterojunction　technology.　©2008　IEEE.

关键词：

Analog circuits Gain control Heterojunctions Industrial informatics Noise figure Si-Ge alloys Variable gain amplifiers Voltage regulators

作者机构：

[ 1 ] [Gan, Jun-Ning]School of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100022, China
[ 2 ] [Zhang, Wan-Rong]School of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100022, China
[ 3 ] [Xie, Hong-Yun]School of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100022, China
[ 4 ] [Jin, Dong-Yue]School of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100022, China
[ 5 ] [Shen, Pei]School of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100022, China
[ 6 ] [Li, Jia]School of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100022, China
[ 7 ] [He, Li-Jian]School of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100022, China

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电子邮件地址：

jun@bjut.edu.cn

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