基于采样计算的差分N通道滤波器  

Differential N-path Filter Based on Sampling Calculation

作　　者：钟辉 宋树祥[1] 岑明灿 蔡超波 蒋品群[1] 刘振宇 ZHONG Hui;SONG Shuxiang;CEN Mingcan;CAI Chaobo;JIANG Pinqun;LIU Zhenyu(College of Electronic Engineering,Guangxi Normal University,Guilin Guangxi 541004,China)

机构地区：[1]广西师范大学电子工程学院,广西桂林541004

出　　处：《广西师范大学学报（自然科学版）》2022年第4期58-67,共10页Journal of Guangxi Normal University:Natural Science Edition

基　　金：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)。

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f_(s)可调范围为0.3~1.0 GHz,总功耗为25.2 mW,输入回波损耗(S_(11))小于-10 dB,噪声系数(NF)为3.1~5.8 dB。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 f_(s) can be adjusted from 0.3-1.0 GHz,and the total power consumption is 25.2 mW.Input return loss S_(11)<-10 dB,and noise factor(NF)is 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 

分 类 号：TN713[电子电信—电路与系统]