A PIN Diode SiGe HBT Variable Gain Amplifier for WCDMA Applications

摘要：

We report a novel PIN diode SiGe HBT variable gain amplifier (VGA) suited for the standard of WCDMA. The PIN diode which is employed in the feedback loop of the VGA play as a variable resistor to realize the gain control function. By adjusting the bias of the diode, the gain of the VGA can be changed. An inductor is utilized in the feedback loop to reduce the noise figure of the circuit. After matching the circuit, we get a variable gain amplifier with 21dB dynamic range, about 19dB maximum gain, and 2.6dB minimum noise figure. This work demonstrates a new method controlling the gain by adding a PIN diode in the feedback loop except changing the bias of the transistor.

作者: Jun-ning Gan Wan-rong Zhang Hong-yun Xie Dong-yue Jin Pei Shen Jia Li Lu Huang Yi-wen Huang Ning Hu

作者单位: School of Electronic Information and Control Engineering, Beijing University of Technology,Beijing 100124, P. R. China

会议类型: 国际会议

会议名称: The International Conference on Communication Software and Networks(2009 IEEE通信软件与网络国际会议 ICCSN 2009)

会议地点: 成都

会议语种:英文

页码: 593-596

在线出版日期: 2009-02-20（万方平台首次上网日期，不代表论文的发表时间）