广西师范大学学报（自然科学版）2024，Vol.42Issue(5)：52-60,9.DOI:10.16088/j.issn.1001-6600.2023101304
基于开关电容的差分无源N通道滤波器
Differential Passive N-path Filter Based on Switched Capacitors
摘要
Abstract
A differential passive N-path filter based on switching capacitors is designed to address the issue that traditional N-path filters are unable to suppress harmonics and harmonic aliasing,and have certain insertion losses.This filter eliminates odd harmonics by using capacitance weighted multiphase signals with different capacitance values,suppresses harmonic aliasing by combining different clock signals,and uses capacitance stacking technology to provide certain gain and reduce insertion loss.The filter adopts TSMC 40 nm CMOS process,and the simulation results show that the center frequency fs of the filter can be adjusted from 0.3-1.5 GHz,and the rejection effect of fs=500 MHz is more than 48 dB for the 3rd and 5th harmonics,and the suppression of the most powerful harmonic folding reaches more than 60 dB,and there is no insertion loss,the noise figure(NF)is 2.5-2.8 dB,and the linearity(IIP3)is above 15 dBm.关键词
N通道滤波器/谐波抑制/谐波混叠/无源/差分结构Key words
N-path filter/harmonic rejection/harmonic folding/passive/differential structure分类
信息技术与安全科学引用本文复制引用
刘畅平,宋树祥,蒋品群,岑明灿..基于开关电容的差分无源N通道滤波器[J].广西师范大学学报（自然科学版）,2024,42(5):52-60,9.基金项目
国家自然科学基金(62061005) （62061005）
广西高校中青年教师科研基础能力提升项目(2020KY02028) （2020KY02028）
