前馈环形振荡器的结构与相位噪声研究

计算机工程与科学 ›› 2022, Vol. 44 ›› Issue (03): 411-416.

前馈环形振荡器的结构与相位噪声研究

桑浩，袁珩洲，梁斌，陈建军，郭阳

(国防科技大学计算机学院,湖南长沙 410073)

收稿日期:2021-03-09 修回日期:2021-04-06 接受日期:2022-03-25 出版日期:2022-03-25 发布日期:2022-03-24
基金资助:
国家自然科学基金（61974163）；国防科技重点实验室基金（WDZC20215250110）;国防科技大学学校预研项目（ZK21-34）

Structure and phase noise of feedforward ring oscillator

SANG Hao,YUAN Heng-zhou,LIANG Bin,CHEN Jian-jun，GUO Yang

(College of Computer Science and Technlolgy,National University of Defense Technology,Changsha 410073,China)

Received:2021-03-09 Revised:2021-04-06 Accepted:2022-03-25 Online:2022-03-25 Published:2022-03-24

摘要/Abstract

摘要： 基于高速串行通信系统中锁相环和时钟数据恢复电路的需求,研究了前馈环形振荡器的结构与工作原理;在传统结构的基础上,将前馈路径耦合至主路径反相器的源极,可以提高输出信号的边沿速率;最后基于Hajimiri模型的脉冲灵敏度函数进行分析,提出的结构有效降低了热噪声和闪烁噪声的引入。在28 nm CMOS工艺下设计了单源极前馈型和双源极前馈型的环形振荡器,仿真结果表明,振荡频率在2.5 GHz时,2种新结构相位噪声分别为-99 dBc/Hz@1 MHz和-105 dBc/Hz@1 MHz,FoM值分别为163 dBc/Hz和164 dBc/Hz。

关键词: 锁相环, 环形振荡器, 脉冲灵敏度函数, 相位噪声

Abstract: Based on the requirement of PLL and clock data recovery circuit in SerDes system, the structure and working principle of feedforward ring oscillator are discussed. On the basis of the traditional structure, the feedforward path is coupled to the source of the main path inverter, which can improve the edge rate of the output signal. Finally, based on the impulse sensitivity function of Hajimiri model, the proposed structure effectively reduces the introduction of thermal noise and flicker noise. Single-source feedforward and dual-source feedforward ring oscillators are designed in 28 nm CMOS process. The simulation results show that when the oscillation frequency is 2.5 GHz, the phase noise of two new structures are -99 dBc/Hz@1 MHz and -105 dBc/Hz@1 MHz respectively, and the FoM are 163 dBc/Hz and 164 dBc/Hz respectively.

Key words: phase locked loop, ring oscillator, impulse sensitivity function, phase noise

桑浩, 袁珩洲, 梁斌, 陈建军, 郭阳. 前馈环形振荡器的结构与相位噪声研究[J]. 计算机工程与科学, 2022, 44(03): 411-416.

SANG Hao, YUAN Heng-zhou, LIANG Bin, CHEN Jian-jun, GUO Yang. Structure and phase noise of feedforward ring oscillator[J]. Computer Engineering & Science, 2022, 44(03): 411-416.

参考文献［5］

［1］	Xia Y J, Shu Z,Shen T M,et al. A 10 GHz low-power serial digital majority voter based on moving accumulative sign filter in a PS-/PI-based CDR［J］.IEEE Transactions on Microwave Theory and Techniques,2020,68(12):5432-5442.
［2］	Goyal A, Ghosh S, Goyal S, et al. A high-resolution digitalphase interpolator based CDR with a half-rate hybrid phase detector［C］∥Proc of 2019 IEEE International Symposium on Circuits and Systems(ISCAS),2019:1-5.
［3］	Jeon G,Kim Y-B. Area efficient 4 Gb/s clock data recovery using improved phase interpolator with error monitor［C］∥Proc of 2018 IEEE 61st International Midwest Symposium on Circuits and Systems(MWSCAS),2018:1-4.
［4］	Ma Zhuo,Pan Guo-teng,Guo Yang,et al.An on-chip DC signal amplifier based on linear frequency modulation and demodulation［J］.Journal of National University of Defense Technology,2012,34(3):136-141.(in Chinese)
［5］	Song Yi-liang,Yuan Heng-zhou,Liu Yao,et al.A low noise eight phase locked loop design［J］.Computer Engineering & Science,2016,38(1):28-32.(in Chinese)
［6］	Ghonoodi H,Miar-Naimi H.Phase error analysis in CMOS injection-coupled LC quadrature oscillator(IC-QO)［J］.International Journal of Circuit Theory and Applications,2014,42(11):1123-1138.
［7］	Yan C G,Hu C.A 0.65-V process variation and supply noise insensitive ring VCO［J］.International Journal of Electronics,2018,105(2):337-347.
［8］	Sun I-F,Yin J,Mak P-I,et al.A comparative study of 8-phase feedforward-coupling ring VCOs［J］.IEEE Transactions on Circuits and Systems II:Express Briefs,2019,66(4):527-531.
［9］	Hajimiri A,Lee T H. A general theory of phase noise in electrical oscillators［J］.IEEE Journal of Solid-State Circuits,1998,33(2):179-194.
［10］	Hajimiri A,Lee T H.Corrections to “A general theory of phase noise in electrical oscillators”［J］.IEEE Journal of Solid-State Circuits,1998,33(6):928.
［11］	Gaidioz D,De Matos M,Cathelin A,et al.Ring VCO phase noise optimization by pseudo-differential architecture in 28 nm FD-SOI CMOS［C］∥Proc of 2020 IEEE International Symposium on Circuits and Systems(ISCAS),2020:1-4.
	附中文参考文献：
［4］	马卓，潘国腾，郭阳，等.基于线性频率调制与解调的片上直流电压信号放大器［J］.国防科技大学学报,2012,34(3):136-141.
［5］	宋意良，袁珩洲，刘尧，等.一款低噪声八相位锁相环设计［J］.计算机工程与科学,2016,38(1):28-32.