电子学报 ›› 2022, Vol. 50 ›› Issue (6): 1480-1486.DOI: 10.12263/DZXB.20210002

• 学术论文 • 上一篇    下一篇

3阶FLFB低通滤波器的最小可接受功耗分析

张旭东1, 雷倩倩1(), 张芳玲1, 李弦2, 李连碧1   

  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
  • 收稿日期:2020-12-22 修回日期:2021-03-24 出版日期:2022-06-25
    • 通讯作者:
    • 雷倩倩
    • 作者简介:
    • 张旭东 男,1996年出生,河南平顶山人.西安工程大学在读硕士.研究方向为模拟基带有源滤波器.E-mail: 15202462872@163.com
      雷倩倩(通讯作者) 女,1984年出生,陕西西安人.博士、副教授.主要研究方向为模拟、数模混合集成电路设计. E-mail: leiqianqian@163.com
    • 基金资助:
    • 深圳市科技计划资助项目 (KQTD20190929172628244)

Analysis of Minimum Acceptable Power Consumption of the 3rd Follow-the-Leader-FeedBack Low Pass Filter

ZHANG Xu-dong1, LEI Qian-qian1(), ZHANG Fang-ling1, LI Xian2, LI Lian-bi1   

  1. 1.School of Science, Xi’an Polytechnic University, Xi’an, Shaanxi 710000, China
    2.NewRadio Tech, Shenzhen, Guangdong 518000, China
  • Received:2020-12-22 Revised:2021-03-24 Online:2022-06-25 Published:2022-06-25
    • Corresponding author:
    • LEI Qian-qian
    • Supported by:
    • Program supported by Shenzhen Science and Technology Project of Guangdong Province (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-FeedBack)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 nm CMOS 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 mm2,此时总功耗为0.36 mW,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.

关键词: 低通滤波器, 最小可接受功耗, FLFB, 稳定性判据

Abstract:

An analysis method about the minimum acceptable power consumption of multiple-loop feedback filter is presented. When a 3rd 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 UMC 40 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 mm2, and the total power consumption is 0.36 mW, 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.

Key words: low pass filter, minimum acceptable power consumption, follow-the-leader-feedback, stability criteria

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