一种新型低噪声放大器的结构分析与设计  

Topology Analysis and Design of New-Style LNA

作　　者：李文杰[1] 张有光[1] 孙泉[1] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100083

出　　处：《微电子学》2007年第3期390-393,398,共5页Microelectronics

摘　　要：将差分输出、套筒式共源共栅、并联负反馈缓冲级相结合,应用到低噪声放大器,设计出一种新型的低噪声运算放大器。给出了用SMIC 0.35μm工艺模型完成电路设计的过程;测得开环增益为60.7 dB,共模抑制比为107 dB,增益平坦带宽为92.5 kHz,噪声为6.203 nV/sqrt(Hz)。测试结果证明了设计的正确性。A new type of low-noise amplifier was designed by combining differential output with telescopic cascode and shunt negative feedback. Design of the circuit based on SMIC＇s 0. 35/zm process model is described. Simulation results show that the LNA has an open-gain of 60.7 dB, a common-mode rejection ratio of 107 dB, a flat-gain bandwidth of 92. 5 kHz and a noise of 6. 203 nV/sqrt （Hz）, which validates the design.

关 键 词：低噪声放大器 套筒式共源共栅 差分输出 共模负反馈 并联负反馈 

分 类 号：TN722.3[电子电信—电路与系统]