Low-noise sub-harmonic injection locked multiloop ring oscillator  

作　　者：徐卫林 吴迪 韦雪明 韦保林 段吉海 归发弟 

机构地区：[1]Guangxi Key Laboratory of Precision Navigation Technology and Application, Guilin University of Electronic Technology

出　　处：《Journal of Semiconductors》2016年第9期100-104,共5页半导体学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(No.61264001);the Guangxi Natural Science Foundation(Nos.2013GXNSFAA019333,2015GXNSFAA139301,2014GXNSFAA118386);the Graduate Education Innovation Program of GUET(No.GDYCSZ201457);the Project of Guangxi Education Department(No.LD14066B);the High-Level-Innovation Team and Outstanding Scholar Project of Guangxi Higher Education Institutes

摘　　要：A three-stage differential voltage-controlled ring oscillator is presented for wide-tuning and low-phase noise requirement of clock and data recovery circuit in ultra wideband（UWB） wireless body area network. To improve the performance of phase noise of delay cell with coarse and fine frequency tuning, injection locked technology together with pseudo differential architecture are adopted. In addition, a multiloop is employed for frequency boosting. Two RVCOs, the standard RVCO without the IL block and the proposed IL RVCO, were fabricated in SMIC 0.18 m 1P6 M Salicide CMOS process. The proposed IL RVCO exhibits a measured phase noise of –112.37 d Bc/Hz at 1 MHz offset from the center frequency of 1 GHz, while dissipating a current of 8 m A excluding the buffer from a 1.8-V supply voltage. It shows a 16.07 d B phase noise improvement at 1 MHz offset compared to the standard topology.A three-stage differential voltage-controlled ring oscillator is presented for wide-tuning and low-phase noise requirement of clock and data recovery circuit in ultra wideband（UWB） wireless body area network. To improve the performance of phase noise of delay cell with coarse and fine frequency tuning, injection locked technology together with pseudo differential architecture are adopted. In addition, a multiloop is employed for frequency boosting. Two RVCOs, the standard RVCO without the IL block and the proposed IL RVCO, were fabricated in SMIC 0.18 m 1P6 M Salicide CMOS process. The proposed IL RVCO exhibits a measured phase noise of –112.37 d Bc/Hz at 1 MHz offset from the center frequency of 1 GHz, while dissipating a current of 8 m A excluding the buffer from a 1.8-V supply voltage. It shows a 16.07 d B phase noise improvement at 1 MHz offset compared to the standard topology.

关 键 词：ring VCO injection-locked multiloop frequency tuning 

分 类 号：TN752[电子电信—电路与系统] TN461