摘要
设计了一种可快速锁定的宽频带CMOS电荷泵锁相环电路.通过增加一个自适应带宽控制模块,当锁相环处于捕捉状态时,增加环路带宽实现快速锁定;锁相环接近锁定状态时,减小带宽,保证环路的稳定性和减小杂散.同时还设计了能工作在宽频率范围的压控振荡器.该锁相环基于0.25μm CMOS工艺,供电电压为2.5V时,工作范围在960～2 560MHz,功耗为8.9～23.2mW,锁定时间小于12μs.
A Fast-lock phase-locked loop（PLL）with a wide band width was designed based on CMOS process.By adding a bandwidth-control module,a wider bandwidth was used during transient to reduce lock time.While a phase lock was attained,the bandwidth was shifted to a smaller value for optimum spectrum.A wide-range voltage-controlled oscillator（VCO）was also designed in the circuit.The PLL can operate in the frequency range from 960to 2 560MHz with a setting time of less than 12 μs,and the power dissipation is from 8.9to 23.2mW at a 2.5Vsupply.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2012年第7期71-74,共4页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
湖北省自然科学基金资助项目(2010CDB02706)
华中科技大学自主创新基金资助项目(C2009Q060)
关键词
锁相环
快速锁定
环形压控振荡器
宽频带
相位噪声
phase-locked loop
fast lock
ring voltage-controlled oscillator
wide rage
phase noise
