广西师范大学学报（自然科学版） ›› 2022, Vol. 40 ›› Issue (4): 58-67.doi: 10.16088/j.issn.1001-6600.2021101102

• 研究论文 • 上一篇    下一篇

基于采样计算的差分N通道滤波器

钟辉, 宋树祥*, 岑明灿, 蔡超波, 蒋品群, 刘振宇   

  1. 广西师范大学电子工程学院,广西桂林 541004
  • 发布日期:2022-08-05
  • 通讯作者: 宋树祥(1970—),男,湖南双峰人,广西师范大学教授,博导。E-mail: songshuxiang@mailbox.gxnu.edu.cn
  • 基金资助:
    国家自然科学基金(62061005);广西高校中青年教师科研基础能力提升项目(2020KY02028);广西研究生教育创新计划项目(YCSW2021070)

Differential N-path Filter Based on Sampling Calculation

ZHONG Hui, SONG Shuxiang*, CEN Mingcan, CAI Chaobo, JIANG Pinqun, LIU Zhenyu   

  1. College of Electronic Engineering, Guangxi Normal University, Guilin Guangxi 541004, China
  • Published:2022-08-05

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摘要： 针对传统N通道滤波器中谐波选择性(HS)和谐波折返(HFB)的问题,本文设计一种基于采样计算的差分N通道滤波器结构。该结构不仅能够抑制偶次谐波以及第3、5个谐波,而且在不增加输入参考时钟频率的情况下,解决谐波折返问题。滤波器电路采用SMIC 110 nm工艺,仿真结果表明,该滤波器在3次和5次谐波时分别具有49 dB和67 dB的谐波抑制,电路中心频率fs可调范围为0.3～1.0 GHz,总功耗为25.2 mW,输入回波损耗(S11)小于-10 dB,噪声系数(NF)为3.1～5.8 dB。

关键词: N通道滤波器, 混频器, 谐波抑制, 谐波折返, 差分结构

Abstract: To solve the problems of harmonic selectivity (HS) and harmonic foldback (HFB) in traditional N-path filters, this paper proposes a differential N-path filter based on sampling calculation. Through this method, the proposed filter can not only suppress the even harmonics and the third and the fifth harmonics, but also solve the problem of harmonic foldback without increasing the input reference clock frequency. The simulation results show that the filter has a harmonic suppression of 49 dB and 67 dB at the 3rd and 5th harmonics, respectively. The circuit center frequency fs can be adjusted from 0.3-1.0 GHz, and the total power consumption is 25.2 mW. Input return loss S11<-10 dB, and noise factor (NF) is3.1-5.8 dB.

Key words: N-path filter, mixer, harmonic suppression, harmonic foldback, differential structure

中图分类号: 

  • TN713
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[1] 蒋品群, 顾燊, 宋树祥, 岑明灿. N通道带阻滤波器谐波分析与抗混叠研究[J]. 广西师范大学学报（自然科学版）, 2021, 39(2): 81-89.
[2] 谢丽娜, 蒋品群, 宋树祥, 岑明灿. 一款低损耗低噪声宽调谐的高阶级联N通道滤波器[J]. 广西师范大学学报（自然科学版）, 2019, 37(4): 37-44.
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