采用负电容结构的新型CTLE均衡器设计  

Design of New CTLE Equalizer with Negative Capacitance Structure

作　　者：陆德超 郑旭强 吕方旭[1] 王和明[1] 陈江 吴苗苗 刘涛[1] LU Dechao;ZHENG Xuqiang;LYU Fangxu;WANG Heming;CHEN Jiang;WU Miaomiao;LIU Tao(Air and Missile Defense College,Air Force Engineering University,Xi'an 710000,China;Institute of Microelectronics,Chinese Academy of Sciences,Beijing 100000,China)

机构地区：[1]空军工程大学防空反导学院,西安710000 [2]中国科学院微电子研究所,北京100000

出　　处：《电光与控制》2022年第4期68-71,94,共5页Electronics Optics & Control

基　　金：国家重点研发计划(2018YFB2202300)。

摘　　要：随着数据传输的速率不断提高,信道对数据的损耗愈发严重,采用传统的连续时间线性均衡器(CTLE)对信号的均衡补偿已无法抵消信道对信号的严重衰减。为了更好地补偿衰减,对传统的CTLE均衡器做了进一步的改进,提出了基于负电容的新型CTLE。在传统的CTLE基础上,使用两个交叉耦合的MOS管构成负电容,将其叠加在传统一级CTLE的输出端,形成二级结构,可以增加高频增益和实现更大的带宽,以便更好地补偿信道的衰减。仿真结果显示,在25 Gibit/s的数据传输速率下,负电容结构的均衡器具有良好的补偿能力,经过均衡后,眼图的水平张开度达到了0.9个码元间隔(UI)以上,采用负电容结构的新型CTLE,对于提升整体传输数据速率具有重要意义。As the rate of data transmission continues to increase,the data loss caused by the channel becomes more and more serious.Using the traditional Continuous-Time Linear Equalizer(CTLE) to equalize and compensate for the signal can no longer offset the serious signal attenuation caused by the channel.In order to better compensate for the attenuation,the traditional CTLE equalizer is further improved,and a new CTLE based on negative capacitance is proposed.On the basis of the traditional CTLE,two cross-connected MOS transistors are used to form a negative capacitor,which is superimposed on the output of the traditional first-level CTLE to form a second-level structure, which can increase high-frequency gain and achieve greater bandwidth,so as to provide better compensation for channel attenuation.The simulation results show that at a data rate of 25 Gibit/s,the equalizer with a negative capacitance has good compensation capability.After equalization,the horizontal opening of the eye diagram reaches 0.9 Unit Interval(UI).The new CTLE based on negative capacitance is helpful for improving the overall data transmission rate.

关 键 词：连续时间线性均衡器 负电容 信道 零极点 眼图 

分 类 号：TN715[电子电信—电路与系统]