A Current Mode Low-Noise Gm-C Filter with a Cut-Off Frequency of 5 GHz in Telecommunication System  

应用于通信系统中的5 GHz电流模低噪声Gm-C滤波器

作　　者：WU Xu LI Lianming 吴旭;李连鸣(东南大学信息科学与工程学院,南京210096,中国;东南大学移动通信国家重点实验室,南京210096,中国;网络通信与安全紫金山实验室,南京210096,中国)

机构地区：[1]School of Information Science and Engineering,Southeast University,Nanjing 210096,P.R.China [2]National Mobile Communication Research Laboratory,Southeast University,Nanjing 210096,P.R.China [3]Purple Mountain Laboratories,Nanjing 210096,P.R.China

出　　处：《Transactions of Nanjing University of Aeronautics and Astronautics》2022年第4期493-498,共6页南京航空航天大学学报（英文版）

基　　金：supported in part by the National Key R&D Program of China(No.2018YFE0205900);in part by the Natural Science Foundation of Jiangsu Province of China(No.BK20180368)。

摘　　要：The high linearity low-noise filter is an indispensable key circuit in the communication system.Based on the structure of current-reuse source-degradation operational transconductance amplifier(OTA),a 5 GHz current-mode low-noise Gm-C filter suitable for high-speed communication systems is proposed.Thanks to the proposed current mode structure and the OTA’s high-power efficiency and high linearity,the filter obtains good noise and high linearity performance with very low power consumption.The filter is designed in standard 65 nm CMOS technology and occupies a core area of 0.06 mm^(2).The simulation results show that the operating bandwidth is 5 GHz,the IIP3 is35 d Bm,and the power consumption is only 3.2 m W.高线性度低噪声滤波器是通信系统中不可缺少的关键电路。基于电流复用型源极退化运算跨导放大器(Operational transconductance amplifier,OTA)结构,本文提出了一种适用于高速通信系统的5 GHz电流模低噪声Gm-C滤波器。利用电流模滤波器的结构特点和电流复用型源极退化OTA的高能效和高线性度,本文设计的滤波器可在低功耗条件下仍具有良好的噪声和线性度性能。该滤波器采用标准65 nm CMOS工艺,核心面积为0.06 mm^(2)。仿真结果表明,其工作带宽为5 GHz,IIP3为35 d Bm,而功耗仅为3.2 m W。

关 键 词：Gm-C filter lowpass filter current mode filter 

分 类 号：TN925[电子电信—通信与信息系统]