一种应用于高速锁相环的宽锁定范围注入锁定分频器  

A wide locking range injection-locked frequency divider for high-speed phase-locked loop

作　　者：邢子哲 XING Zizhe(Tianjin Key Laboratory of Imaging and Sensing Microelectronic Technology,Tianjin University,Tianjin 300072,P.R.China)

机构地区：[1]天津大学天津市成像与感知微电子技术重点实验室,天津300072

出　　处：《重庆大学学报》2021年第11期1-8,共8页Journal of Chongqing University

基　　金：国家重点研发计划资助项目(2016YFA0202200)。

摘　　要：针对传统的注入锁定分频器锁定范围较窄的问题,提出了一种用于毫米波锁相环的注入锁定分频器。基于55 nm CMOS工艺,设计了一种宽锁定范围的二分频注入锁定分频器。提出分布式差分注入的方式,增强注入电流与注入效率,采用高阶变压器作为谐振腔,在不使用调谐机制的条件下,有效增大了分频器的锁定范围。此外,还对传统buffer的结构进行改进,增强谐波抑制能力,保持了较宽的锁定范围。电路仿真结果表明,提出的分频器电路在0 dBm注入功率下可在22.8~36.3 GHz频段内完成二分频功能,达到45.7%的锁定范围,电路的功耗为3.54 mW(不含buffer)。A 30 GHz wide locking range injection-locked frequency divider based on 55 nm CMOS process for millimeter-wave phase-locked loop was proposed to overcome the problem of narrow locking range of traditional injection-locked frequency dividers.Distributed direct injection and high-order transformer resonator were applied to the frequency divider to increase the injection current and injection efficiency,thus achieving wide locking range without tuning mechanisms.Harmonic suppression technique was also adopted to the output buffer to improve the locking range with no penalty in power consumption.The post simulation results show that the locking range of the proposed frequency divider was 22.8-36.3 GHz(45.7%)at the injection power of 0 dBm and the power dissipation of core circuit was 3.54 mW.

关 键 词：分频器 CMOS 锁相环 宽锁定范围 分布式注入 高阶谐振腔 

分 类 号：TN433[电子电信—微电子学与固体电子学]