A High Dynamic Range SiGe HBT Variable Gain Amplifier for WCDMA Applications

被引：0
|
作者：
Gan Jun-ning [1 ]
Zhang Wan-rong [1 ]
Xie Hong-yun [1 ]
Jin Dong-yue [1 ]
Shen Pei [1 ]
Li Jia [1 ]
He Li-jian [1 ]
机构：
[1] Beijing Univ Technol, Sch Elect Informat & Control Engn, Beijing 100022, Peoples R China
来源：
2008 6TH IEEE INTERNATIONAL CONFERENCE ON INDUSTRIAL INFORMATICS, VOLS 1-3 | 2008年
关键词：
Linear-in-dB gain control; high dynamic range; variable gain amplifier; SiGe HBT;
D O I：
暂无
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
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 mu m f(T) = 43 GHz silicon germanium heterojunction technology.
引用
收藏
页码：577 / 580
页数：4
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