3阶FLFB低通滤波器的最小可接受功耗分析  

Analysis of Minimum Acceptable Power Consumption of the 3^(rd) Follow-the-Leader-Feed Back Low Pass Filter

作　　者：张旭东 雷倩倩[1] 张芳玲 李弦 李连碧[1] ZHANG Xu-dong;LEI Qian-qian;ZHANG Fang-ling;LI Xian;LI Lian-bi(School of Science,Xi’an Polytechnic University,Xi’an,Shaanxi 710000,China;NewRadio Tech,Shenzhen,Guangdong 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：《电子学报》2022年第6期1480-1486,共7页Acta Electronica Sinica

基　　金：深圳市科技计划资助项目(No.KQTD20190929172628244)。

摘　　要：对于多重反馈滤波器提出了一种最小可接受功耗的分析方法.采用劳斯-赫尔维茨稳定性判据对3阶FLFB(Follow-the-Leader-Feed Back)低通滤波器进行分析,当滤波器处于稳定临界状态时,利用MATLAB拟合出最小可接受相位裕度曲线和跨导图,通过电路级分析和验证,给出了滤波器设计参数与功耗之间的关系.采用UMC 40 nmCMOS工艺进行电路设计,后仿结果表明:滤波器的带宽可调范围为0.9~9.9 MHz,版图面积0.03 mm^(2),此时总功耗为0.36 m W,与传统采用60°相位裕度的设计相比,功耗减小了近30%.在保证滤波器稳定工作的前提下,降低了功耗,与理论相吻合.An analysis method about the minimum acceptable power consumption of multiple-loop feedback filter is presented.When a 3^(rd)follow-the-leader-feedback(FLFB)low pass filter working at the stable state edge,based on Routh-Hurwitz stability criteria,synthesize the minimum acceptable phase margin curve and transconductance figure by MATLAB,and the relationship between filter design parameters and power consumption is given through circuit-level analysis and verification.Design is fabricated in UMC40 nm CMOS technology,the post-simulation results show that the cutoff frequency is adjustable for 0.9~9.9 MHz,the layout area is 0.03 mm~2,and the total power consumption is 0.36 m W,reduced nearly 30%compared with the traditional design that phase margin is 60°.Under the premise of ensuring the stable operation of the filter,the power consumption is reduced,confirmed the minimum acceptable power consumption theory.

关 键 词：低通滤波器 最小可接受功耗 FLFB 稳定性判据 

分 类 号：TN713[电子电信—电路与系统]