低噪声低功耗3阶复数滤波器的设计
2021年电子技术应用第9期
张旭东1,雷倩倩1,张芳玲1,李 弦2,李连碧1
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
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90.6 μV,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。
中图分类号: TN713
文献标识码: A
DOI:10.16157/j.issn.0258-7998.211278
中文引用格式: 张旭东,雷倩倩,张芳玲,等. 低噪声低功耗3阶复数滤波器的设计[J].电子技术应用,2021,47(9):30-34.
英文引用格式: Zhang Xudong,Lei Qianqian,Zhang Fangling,et al. Design of low-noise low-power 3rd complex filter[J]. Application of Electronic Technique,2021,47(9):30-34.
文献标识码: A
DOI:10.16157/j.issn.0258-7998.211278
中文引用格式: 张旭东,雷倩倩,张芳玲,等. 低噪声低功耗3阶复数滤波器的设计[J].电子技术应用,2021,47(9):30-34.
英文引用格式: Zhang Xudong,Lei Qianqian,Zhang Fangling,et al. Design of low-noise low-power 3rd complex filter[J]. Application of Electronic Technique,2021,47(9):30-34.
Design of low-noise low-power 3rd complex filter
Zhang Xudong1,Lei Qianqian1,Zhang Fangling1,Li Xian2,Li Lianbi1
1.School of Science,Xi′an Polytechnic University,Xi′an 710000,China;2.NewRadio Tech,Shenzhen 518000,China
Abstract: his 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 90.6 ?滋V, spurious-free dynamic ranges is 73.7 dB, image rejection radio is 28.4 dB, and the total power consumption is 1.33 mW.
Key words : complex filter;low noise;low power;stability criteria
0 引言
在低中频接收机中,常采用复数滤波器来抑制混频过程中产生的镜像信号[1-3]。复数滤波器一般以低通滤波器为基础,通过交叉通路,使得对称轴频移jω0,由原先以j轴为对称的低通滤波器,变为以ω0为中心频率的带通滤波器,形成了以j轴非对称滤波的效果,达到选择有用信号而抑制镜像信号的目的[4-5]。
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作者信息:
张旭东1,雷倩倩1,张芳玲1,李 弦2,李连碧1
(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)
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