A second differential bandpass filter with tuning center frequency and constant Q - 文章详情页

作者：

Zhao, Yanxiao (Zhao, Yanxiao.) | Zhang, Wanrong (Zhang, Wanrong.) | Xie, Hongyun (Xie, Hongyun.) | Huang, Xin (Huang, Xin.) | Zhang, Lianghao (Zhang, Lianghao.)

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EI Scopus

摘要：

A　second　order　differential　filter　with　Q-enhancement　and　tunable　active　inductor　is　presented.　The　design　technique　for　a　tunable　Q-enhancement　SiGe　HBT　active　inductor　operating　in　the　wide　RF-band　for　the　filter　is　described.　Multi-regulated　Cascode　circuit　is　employed　to　enhance　the　quality　factor　Q　by　increasing　the　output　impedance.　Tunable　active　resistor　is　introduced　to　boost　the　tuning　ability　of　the　active　inductor.　Employing　the　proposed　active　inductor,　the　center　frequency　of　the　filter　is　tuned　in　the　frequency　of　1.05∼2.45GHz　by　adjusting　the　bias　current,　Q　reducing　with　different　bias　current　can　be　compensated　via　tuning　the　feedback　effective　resistance　of　the　active　inductor,　and　Q　has　almost　constant　value　of　209∼225　at　the　frequency　of　2.15GHz.　©　(2015)　Trans　Tech　Publications,　Switzerland.

关键词：

Analog circuits Bandpass filters Electric inductors Resistors Si-Ge alloys Tuning

作者机构：

[ 1 ] [Zhao, Yanxiao]College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing; 100124, China
[ 2 ] [Zhang, Wanrong]College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing; 100124, China
[ 3 ] [Xie, Hongyun]College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing; 100124, China
[ 4 ] [Huang, Xin]College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing; 100124, China
[ 5 ] [Zhang, Lianghao]College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing; 100124, China

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