Design of a New Variable Gain Amplifier - 文章详情页

作者：

Li, Juzhe (Li, Juzhe.) | Liu, Xu (Liu, Xu.) | Zhao, Di (Zhao, Di.) | Liu, Jiahui (Liu, Jiahui.) | Bi, Chengju (Bi, Chengju.)

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摘要：

This　paper　proposes　a　new　variable　gain　amplifier　(VGA)　using　the　tunable　exponential　tail　current　source.　Compared　to　the　traditional　digitally　controlled　VGA　where　constant　tail　current　source　is　applied,　the　proposed　design　improves　the　dynamic　range　due　to　the　larger　current　provided　by　the　exponential　tail　current　source.　Moreover,　tail　current　source　array　is　used　in　this　work　to　further　increase　the　dynamic　range.　This　new　VGA　circuit　design　is　completed　using　SMIC　0.18　μm　CMOS　process　in　Cadence.　The　simulation　results　show　that　the　total　exponential　tail　current　for　each　stage　ranges　from　4.7　μA-279　μA,　and　a　dynamic　range　of-3　dB　35　dB,　with　6.67　MHz　bandwidth　is　achieved.　©　2019　IEEE.

关键词：

Analog circuits Variable gain amplifiers Voltage regulators

作者机构：

[ 1 ] [Li, Juzhe]Beijing University of Technology, Beijing, China
[ 2 ] [Liu, Xu]Beijing University of Technology, Beijing, China
[ 3 ] [Zhao, Di]Beijing University of Technology, Beijing, China
[ 4 ] [Liu, Jiahui]Beijing University of Technology, Beijing, China
[ 5 ] [Bi, Chengju]Beijing Construction and Civil Engineering Co. Ltd, Beijing, China

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