Low-Noise Design for Wideband Front-End Circuits and Systems of Optical and Microwave Receivers  

作　　者：WANG Jun 

机构地区：[1]School of Information Engineering, Southwest University of Science and Technology, Mianyang 621010, China

出　　处：《Chinese Journal of Electronics》2008年第3期558-562,共5页电子学报（英文版）

基　　金：Manuscript Received Apr. 2006; Accepted Nov. 2007. This work is supported by the National Natural Science Foundation of China （No.69901003）, the Foundation of Southwest University of Science and Technology （No.06zx7106） and the Key Program of Sichuan Province Education Department （No.07ZA131）.

摘　　要：Analog front-end circuits and systems is becoming increasingly important as technology continues to wideband. In this paper, based on the two-port equivalent noise models, a modularized method is developed to fast and accurate noise analysis and design of preamplifier, which is the most critical building block in the front-end circuits. A fundamental noise model is En - In model. Using the En - In model data, all noise performance indexes can be predicted easily. Moreover, the correlation coeffi- cient between En and In is assumed to be a complex here, not a real in the conventional, for the accurate estimation of optimum source impedance. In addition, the matching networks and noise canceling technique for wideband appli- cation are overviewed and summarized here. Finally, the illustrative experiments verify that the proposed technique has a significant potential use for high sensitivity receivers.

关 键 词：Low-noise design Wideband front-end circuits Optical and microwave receivers 

分 类 号：TN929.5[电子电信—通信与信息系统]