低噪声低功耗3阶复数滤波器的设计  

Design of low-noise low-power 3rd complex filter

作　　者：张旭东 雷倩倩[1] 张芳玲 李弦 李连碧[1] Zhang Xudong;Lei Qianqian;Zhang Fangling;Li Xian;Li Lianbi(School of Science,Xi′an Polytechnic University,Xi′an 710000,China;NewRadio Tech,Shenzhen 518000,China)

机构地区：[1]西安工程大学理学院,陕西西安710000 [2]深圳市纽瑞芯科技有限公司,广东深圳518000

出　　处：《电子技术应用》2021年第9期30-34,共5页Application of Electronic Technique

摘　　要：采用UMC 40 nm CMOS工艺,设计了一款低噪声低功耗的3阶复数滤波器。利用FLFB(Follow-the-Leader-Feedback)结构良好的噪声特性,并以劳斯-霍尔维茨稳定性判据为理论依据,采用相位裕度仅为36.8°的运放,达到低噪声低功耗的优化目的。仿真结果表明:滤波器的带宽可调范围为0.98~1.92 MHz,中心频率0.68~1.34 MHz可调,通带内噪声90.6μV,无杂散动态范围73.7 dB,镜像抑制比28.4 dB,此时总功耗为1.33 mW。This paper presents a low-noise low-power third-order complex filter in UMC 40 nm CMOS technology.Based on follow-the-leader-feedback architecture inherently noise figure and routh-hurwitz stability criteria,the phase margin is designed in merely 36.8 deg of operational amplifier,achieving the low-noise low-power optimization.Simulation results show that the bandwidth is adjustable for 0.98~1.92 MHz,center frequency is adjustable for 0.68~1.34 MHz,the noise in-band is 90.6μV,spurious-free dynamic ranges is 73.7 dB,image rejection radio is 28.4 dB,and the total power consumption is 1.33 mW.

关 键 词：复数滤波器 低噪声 低功耗 稳定性判据 

分 类 号：TN713[电子电信—电路与系统]